.forgejo/workflows/test.yml

@@ -16,9 +16,6 @@ jobs:
       - uses: https://git.libre-chip.org/mirrors/rust-cache@v2
         with:
           save-if: ${{ github.ref == 'refs/heads/master' }}
-      - run: rustup override set 1.93.0
-      - run: rustup component add rust-src
-      - run: make -C rocq-demo
       - run: cargo test
       - run: cargo build --tests --features=unstable-doc
       - run: cargo test --doc --features=unstable-doc

Cargo.lock

@@ -319,12 +319,10 @@ dependencies = [
  "jobslot",
  "num-bigint",
  "num-traits",
- "once_cell",
  "ordered-float",
  "petgraph",
  "serde",
  "serde_json",
- "sha2",
  "tempfile",
  "trybuild",
  "vec_map",
@@ -523,9 +521,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.21.3"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "ordered-float"

Cargo.toml

@@ -11,7 +11,7 @@ edition = "2024"
 repository = "https://git.libre-chip.org/libre-chip/fayalite"
 keywords = ["hdl", "hardware", "semiconductors", "firrtl", "fpga"]
 categories = ["simulation", "development-tools", "compilers"]
-rust-version = "1.93.0"
+rust-version = "1.89.0"
 
 [workspace.dependencies]
 fayalite-proc-macros = { version = "=0.3.0", path = "crates/fayalite-proc-macros" }
@@ -30,7 +30,6 @@ indexmap = { version = "2.5.0", features = ["serde"] }
 jobslot = "0.2.23"
 num-bigint = "0.4.6"
 num-traits = "0.2.16"
-once_cell = "1.21.3"
 ordered-float = { version = "5.1.0", features = ["serde"] }
 petgraph = "0.8.1"
 prettyplease = "0.2.20"

crates/fayalite-proc-macros-impl/src/fold.rs

@@ -257,6 +257,5 @@ no_op_fold!(syn::Token![let]);
 no_op_fold!(syn::Token![mut]);
 no_op_fold!(syn::Token![static]);
 no_op_fold!(syn::Token![struct]);
-no_op_fold!(syn::Token![type]);
 no_op_fold!(syn::Token![where]);
 no_op_fold!(usize);

crates/fayalite-proc-macros-impl/src/hdl_bundle.rs

@@ -3,9 +3,8 @@
 use crate::{
     Errors, HdlAttr, PairsIterExt,
     hdl_type_common::{
-        CustomDebugOptions, CustomDebugTrait, ItemOptions, MakeHdlTypeExpr, MaybeParsed,
+        ItemOptions, MakeHdlTypeExpr, MaybeParsed, ParsedField, ParsedFieldsNamed, ParsedGenerics,
-        ParsedField, ParsedFieldsNamed, ParsedGenerics, SplitForImpl, TypesParser, WrappedInConst,
+        SplitForImpl, TypesParser, WrappedInConst, common_derives, get_target,
-        common_derives, create_struct_debug_impl, get_target,
     },
     kw,
 };
@@ -31,7 +30,6 @@ pub(crate) struct ParsedBundle {
     pub(crate) fields: MaybeParsed<ParsedFieldsNamed, FieldsNamed>,
     pub(crate) field_flips: Vec<Option<HdlAttr<kw::flip, kw::hdl>>>,
     pub(crate) mask_type_ident: Ident,
-    pub(crate) mask_type_name: String,
     pub(crate) mask_type_match_variant_ident: Ident,
     pub(crate) mask_type_sim_value_ident: Ident,
     pub(crate) match_variant_ident: Ident,
@@ -90,8 +88,6 @@ impl ParsedBundle {
             no_runtime_generics: _,
             cmp_eq: _,
             ref get,
-            custom_debug: _,
-            custom_sim_display: _,
         } = options.body;
         if let Some((get, ..)) = get {
             errors.error(get, "#[hdl(get(...))] is not allowed on structs");
@@ -135,7 +131,6 @@ impl ParsedBundle {
             fields,
             field_flips,
             mask_type_ident: format_ident!("__{}__MaskType", ident),
-            mask_type_name: format!("MaskType<{}>", ident),
             mask_type_match_variant_ident: format_ident!("__{}__MaskType__MatchVariant", ident),
             mask_type_sim_value_ident: format_ident!("__{}__MaskType__SimValue", ident),
             match_variant_ident: format_ident!("__{}__MatchVariant", ident),
@@ -453,7 +448,6 @@ impl ToTokens for ParsedBundle {
             fields,
             field_flips,
             mask_type_ident,
-            mask_type_name,
             mask_type_match_variant_ident,
             mask_type_sim_value_ident,
             match_variant_ident,
@@ -470,20 +464,11 @@ impl ToTokens for ParsedBundle {
             no_runtime_generics,
             cmp_eq,
             get: _,
-            custom_debug: _,
-            custom_sim_display,
         } = &options.body;
-        let CustomDebugOptions {
-            type_: custom_debug_type,
-            sim: custom_debug_sim,
-            mask_type: custom_debug_mask_type,
-            mask_sim: custom_debug_mask_sim,
-        } = options.body.custom_debug();
         let target = get_target(target, ident);
-        let struct_name = ident.to_string();
         let mut item_attrs = attrs.clone();
-        item_attrs.push(common_derives(span, false));
+        item_attrs.push(common_derives(span));
-        let type_struct = ItemStruct {
+        ItemStruct {
             attrs: item_attrs,
             vis: vis.clone(),
             struct_token: *struct_token,
@@ -491,8 +476,8 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(fields.clone().into()),
             semi_token: None,
-        };
+        }
-        type_struct.to_tokens(tokens);
+        .to_tokens(tokens);
         let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
         if let (MaybeParsed::Parsed(generics), MaybeParsed::Parsed(fields), None) =
             (generics, fields, no_runtime_generics)
@@ -518,9 +503,6 @@ impl ToTokens for ParsedBundle {
         }
         let mut wrapped_in_const = WrappedInConst::new(tokens, span);
         let tokens = wrapped_in_const.inner();
-        if custom_debug_type.is_none() {
-            create_struct_debug_impl(&type_struct, &struct_name, None).to_tokens(tokens);
-        }
         let builder = Builder {
             vis: vis.clone(),
             struct_token: *struct_token,
@@ -548,9 +530,9 @@ impl ToTokens for ParsedBundle {
         mask_type_builder.to_tokens(tokens);
         let unfilled_mask_type_builder_ty =
             mask_type_builder.builder_struct_ty(|_| BuilderFieldState::Unfilled);
-        let mask_type_struct = ItemStruct {
+        ItemStruct {
             attrs: vec![
-                common_derives(span, false),
+                common_derives(span),
                 parse_quote_spanned! {span=>
                     #[allow(non_camel_case_types, dead_code)]
                 },
@@ -561,20 +543,17 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(mask_type_fields.clone()),
             semi_token: None,
-        };
-        mask_type_struct.to_tokens(tokens);
-        if custom_debug_mask_type.is_none() {
-            create_struct_debug_impl(&mask_type_struct, mask_type_name, None).to_tokens(tokens);
         }
+        .to_tokens(tokens);
         let mut mask_type_match_variant_fields = mask_type_fields.clone();
         for Field { ty, .. } in &mut mask_type_match_variant_fields.named {
             *ty = parse_quote_spanned! {span=>
                 ::fayalite::expr::Expr<#ty>
             };
         }
-        let mask_type_match_variant_struct = ItemStruct {
+        ItemStruct {
             attrs: vec![
-                common_derives(span, false),
+                common_derives(span),
                 parse_quote_spanned! {span=>
                     #[allow(non_camel_case_types, dead_code)]
                 },
@@ -585,19 +564,17 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(mask_type_match_variant_fields),
             semi_token: None,
-        };
+        }
-        mask_type_match_variant_struct.to_tokens(tokens);
+        .to_tokens(tokens);
-        create_struct_debug_impl(&mask_type_match_variant_struct, mask_type_name, None)
-            .to_tokens(tokens);
         let mut match_variant_fields = FieldsNamed::from(fields.clone());
         for Field { ty, .. } in &mut match_variant_fields.named {
             *ty = parse_quote_spanned! {span=>
                 ::fayalite::expr::Expr<#ty>
             };
         }
-        let match_variant_struct = ItemStruct {
+        ItemStruct {
             attrs: vec![
-                common_derives(span, false),
+                common_derives(span),
                 parse_quote_spanned! {span=>
                     #[allow(non_camel_case_types, dead_code)]
                 },
@@ -608,19 +585,19 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(match_variant_fields),
             semi_token: None,
-        };
+        }
-        match_variant_struct.to_tokens(tokens);
+        .to_tokens(tokens);
-        create_struct_debug_impl(&match_variant_struct, &struct_name, None).to_tokens(tokens);
         let mut mask_type_sim_value_fields = mask_type_fields;
         for Field { ty, .. } in &mut mask_type_sim_value_fields.named {
             *ty = parse_quote_spanned! {span=>
                 ::fayalite::sim::value::SimValue<#ty>
             };
         }
-        let mask_type_sim_value_struct = ItemStruct {
+        ItemStruct {
             attrs: vec![
                 parse_quote_spanned! {span=>
                     #[::fayalite::__std::prelude::v1::derive(
+                        ::fayalite::__std::fmt::Debug,
                         ::fayalite::__std::clone::Clone,
                     )]
                 },
@@ -634,34 +611,19 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(mask_type_sim_value_fields),
             semi_token: None,
-        };
-        mask_type_sim_value_struct.to_tokens(tokens);
-        if custom_debug_mask_sim.is_none() {
-            create_struct_debug_impl(
-                &mask_type_struct,
-                mask_type_name,
-                Some(CustomDebugTrait {
-                    trait_path: &parse_quote_spanned! {span=>
-                        ::fayalite::ty::SimValueDebug
-                    },
-                    fn_name: &format_ident!("sim_value_debug", span = span),
-                    this_arg: &parse_quote_spanned! {span=>
-                        value: &<Self as ::fayalite::ty::Type>::SimValue
-                    },
-                }),
-            )
-            .to_tokens(tokens);
         }
+        .to_tokens(tokens);
         let mut sim_value_fields = FieldsNamed::from(fields.clone());
         for Field { ty, .. } in &mut sim_value_fields.named {
             *ty = parse_quote_spanned! {span=>
                 ::fayalite::sim::value::SimValue<#ty>
             };
         }
-        let sim_value_struct = ItemStruct {
+        ItemStruct {
             attrs: vec![
                 parse_quote_spanned! {span=>
                     #[::fayalite::__std::prelude::v1::derive(
+                        ::fayalite::__std::fmt::Debug,
                         ::fayalite::__std::clone::Clone,
                     )]
                 },
@@ -675,36 +637,8 @@ impl ToTokens for ParsedBundle {
             generics: generics.into(),
             fields: Fields::Named(sim_value_fields),
             semi_token: None,
-        };
-        sim_value_struct.to_tokens(tokens);
-        if custom_debug_sim.is_none() {
-            create_struct_debug_impl(
-                &type_struct,
-                &struct_name,
-                Some(CustomDebugTrait {
-                    trait_path: &parse_quote_spanned! {span=>
-                        ::fayalite::ty::SimValueDebug
-                    },
-                    fn_name: &format_ident!("sim_value_debug", span = span),
-                    this_arg: &parse_quote_spanned! {span=>
-                        value: &<Self as ::fayalite::ty::Type>::SimValue
-                    },
-                }),
-            )
-            .to_tokens(tokens);
-        }
-        if custom_sim_display.is_some() {
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::__std::fmt::Display for #sim_value_ident #type_generics
-                #where_clause
-                {
-                    fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                        <#target #type_generics as ::fayalite::ty::SimValueDisplay>::sim_value_display(self, f)
-                    }
-                }
-            }.to_tokens(tokens);
         }
+        .to_tokens(tokens);
         let this_token = Ident::new("__this", span);
         let fields_token = Ident::new("__fields", span);
         let self_token = Token![self](span);
@@ -886,14 +820,6 @@ impl ToTokens for ParsedBundle {
                 }
             }
             #[automatically_derived]
-            impl #impl_generics ::fayalite::__std::fmt::Debug for #mask_type_sim_value_ident #type_generics
-            #where_clause
-            {
-                fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                    <#mask_type_ident #type_generics as ::fayalite::ty::SimValueDebug>::sim_value_debug(self, f)
-                }
-            }
-            #[automatically_derived]
             impl #impl_generics ::fayalite::expr::ValueType for #mask_type_sim_value_ident #type_generics
             #where_clause
             {
@@ -1054,14 +980,6 @@ impl ToTokens for ParsedBundle {
                 }
             }
             #[automatically_derived]
-            impl #impl_generics ::fayalite::__std::fmt::Debug for #sim_value_ident #type_generics
-            #where_clause
-            {
-                fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                    <#target #type_generics as ::fayalite::ty::SimValueDebug>::sim_value_debug(self, f)
-                }
-            }
-            #[automatically_derived]
             impl #impl_generics ::fayalite::expr::ValueType for #sim_value_ident #type_generics
             #where_clause
             {
@@ -1223,7 +1141,7 @@ impl ToTokens for ParsedBundle {
                 valueless_eq_body = quote_spanned! {span=>
                     let __lhs = ::fayalite::expr::ValueType::ty(&__lhs);
                     let __rhs = ::fayalite::expr::ValueType::ty(&__rhs);
-                    #(#fields_valueless_eq)&*
+                    #(#fields_valueless_eq)|*
                 };
                 valueless_ne_body = quote_spanned! {span=>
                     let __lhs = ::fayalite::expr::ValueType::ty(&__lhs);

crates/fayalite-proc-macros-impl/src/hdl_enum.rs

@@ -3,9 +3,8 @@
 use crate::{
     Errors, HdlAttr, PairsIterExt,
     hdl_type_common::{
-        CustomDebugOptions, ItemOptions, MakeHdlTypeExpr, MaybeParsed, ParsedGenerics, ParsedType,
+        ItemOptions, MakeHdlTypeExpr, MaybeParsed, ParsedGenerics, ParsedType, SplitForImpl,
-        SplitForImpl, TypesParser, WrappedInConst, common_derives, create_struct_debug_impl,
+        TypesParser, WrappedInConst, common_derives, get_target,
-        get_target,
     },
     kw,
 };
@@ -159,32 +158,15 @@ impl ParsedEnum {
             custom_bounds,
             no_static: _,
             no_runtime_generics: _,
-            cmp_eq: _,
+            cmp_eq,
             ref get,
-            custom_debug: _,
-            custom_sim_display: _,
         } = options.body;
+        if let Some((cmp_eq,)) = cmp_eq {
+            errors.error(cmp_eq, "#[hdl(cmp_eq)] is not yet implemented for enums");
+        }
         if let Some((get, ..)) = get {
             errors.error(get, "#[hdl(get(...))] is not allowed on enums");
         }
-        let CustomDebugOptions {
-            type_: _,
-            sim: _,
-            mask_type,
-            mask_sim,
-        } = options.body.custom_debug();
-        if let Some((mask_type,)) = mask_type {
-            errors.error(
-                mask_type,
-                "#[hdl(custom_debug(mask_type)] is not allowed on enums",
-            );
-        }
-        if let Some((mask_sim,)) = mask_sim {
-            errors.error(
-                mask_sim,
-                "#[hdl(custom_debug(mask_sim)] is not allowed on enums",
-            );
-        }
         attrs.retain(|attr| {
             if attr.path().is_ident("repr") {
                 errors.error(attr, "#[repr] is not supported on #[hdl] enums");
@@ -246,21 +228,12 @@ impl ToTokens for ParsedEnum {
             custom_bounds: _,
             no_static,
             no_runtime_generics,
-            cmp_eq,
+            cmp_eq: _, // TODO: implement cmp_eq for enums
             get: _,
-            custom_debug: _,
-            custom_sim_display,
         } = &options.body;
-        let CustomDebugOptions {
-            type_: custom_debug_type,
-            sim: custom_debug_sim,
-            mask_type: _,
-            mask_sim: _,
-        } = options.body.custom_debug();
         let target = get_target(target, ident);
-        let enum_name = ident.to_string();
         let mut struct_attrs = attrs.clone();
-        struct_attrs.push(common_derives(span, false));
+        struct_attrs.push(common_derives(span));
         struct_attrs.push(parse_quote_spanned! {span=>
             #[allow(non_snake_case)]
         });
@@ -300,7 +273,7 @@ impl ToTokens for ParsedEnum {
                 }
             },
         ));
-        let type_struct = ItemStruct {
+        ItemStruct {
             attrs: struct_attrs,
             vis: vis.clone(),
             struct_token: Token![struct](enum_token.span),
@@ -315,8 +288,8 @@ impl ToTokens for ParsedEnum {
                 })
             },
             semi_token: None,
-        };
+        }
-        type_struct.to_tokens(tokens);
+        .to_tokens(tokens);
         let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
         if let (MaybeParsed::Parsed(generics), None) = (generics, no_runtime_generics) {
             generics.make_runtime_generics(tokens, vis, ident, &target, |context| {
@@ -400,9 +373,6 @@ impl ToTokens for ParsedEnum {
             }
             .to_tokens(tokens);
         }
-        if custom_debug_type.is_none() {
-            create_struct_debug_impl(&type_struct, &enum_name, None).to_tokens(tokens);
-        }
         let mut enum_attrs = attrs.clone();
         enum_attrs.push(parse_quote_spanned! {span=>
             #[allow(dead_code, non_camel_case_types)]
@@ -483,6 +453,7 @@ impl ToTokens for ParsedEnum {
         let mut enum_attrs = attrs.clone();
         enum_attrs.push(parse_quote_spanned! {span=>
             #[::fayalite::__std::prelude::v1::derive(
+                ::fayalite::__std::fmt::Debug,
                 ::fayalite::__std::clone::Clone,
             )]
         });
@@ -867,240 +838,6 @@ impl ToTokens for ParsedEnum {
                     },
                 )),
         );
-        if custom_debug_sim.is_none() {
-            let debug_match_arms = Vec::from_iter(
-                variants
-                    .iter()
-                    .map(
-                        |ParsedVariant {
-                             attrs: _,
-                             options: _,
-                             ident,
-                             field,
-                         }| {
-                            let variant_name = ident.to_string();
-                            if let Some(_) = field {
-                                quote_spanned! {span=>
-                                    #sim_value_ident::#ident(field, _) => {
-                                        f.debug_tuple(#variant_name).field(field).finish()
-                                    }
-                                }
-                            } else {
-                                quote_spanned! {span=>
-                                    #sim_value_ident::#ident(_) => {
-                                        f.write_str(#variant_name)
-                                    }
-                                }
-                            }
-                        },
-                    )
-                    .chain(sim_value_unknown_variant_name.as_ref().map(
-                        |sim_value_unknown_variant_name| {
-                            let sim_value_unknown_variant_name_str =
-                                sim_value_unknown_variant_name.to_string();
-                            quote_spanned! {span=>
-                                #sim_value_ident::#sim_value_unknown_variant_name(_) => {
-                                    f.write_str(#sim_value_unknown_variant_name_str)
-                                }
-                            }
-                        },
-                    )),
-            );
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::ty::SimValueDebug for #target #type_generics
-                #where_clause
-                {
-                    fn sim_value_debug(
-                        value: &<Self as ::fayalite::ty::Type>::SimValue,
-                        f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                    ) -> ::fayalite::__std::fmt::Result {
-                        match value {
-                            #(#debug_match_arms)*
-                        }
-                    }
-                }
-            }
-            .to_tokens(tokens);
-        }
-        if custom_sim_display.is_some() {
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::__std::fmt::Display for #sim_value_ident #type_generics
-                #where_clause
-                {
-                    fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                        <#target #type_generics as ::fayalite::ty::SimValueDisplay>::sim_value_display(self, f)
-                    }
-                }
-            }.to_tokens(tokens);
-        }
-        if let Some((cmp_eq,)) = cmp_eq {
-            let mut cmp_eq_where_clause =
-                Generics::from(generics)
-                    .where_clause
-                    .unwrap_or_else(|| syn::WhereClause {
-                        where_token: Token![where](span),
-                        predicates: Punctuated::new(),
-                    });
-            let mut variants_value_eq = vec![];
-            let mut variants_expr_eq = vec![];
-            let mut fields_valueless_eq = vec![];
-            for (
-                variant_index,
-                ParsedVariant {
-                    attrs: _,
-                    options: variant_options,
-                    ident: variant_ident,
-                    field,
-                },
-            ) in variants.iter().enumerate()
-            {
-                let VariantOptions {} = variant_options.body;
-                if let Some(ParsedVariantField {
-                    paren_token: _,
-                    attrs: _,
-                    options: field_options,
-                    ty: field_ty,
-                    comma_token: _,
-                }) = field
-                {
-                    let FieldOptions {} = field_options.body;
-                    cmp_eq_where_clause
-                        .predicates
-                        .push(parse_quote_spanned! {cmp_eq.span=>
-                            #field_ty: ::fayalite::expr::HdlPartialEqImpl<#field_ty>
-                        });
-                    variants_value_eq.push(quote_spanned! {span=>
-                        (#sim_value_ident::#variant_ident(__lhs_field, _), #sim_value_ident::#variant_ident(__rhs_field, _)) => {
-                            ::fayalite::expr::HdlPartialEqImpl::cmp_value_eq(
-                                __lhs.#variant_ident,
-                                ::fayalite::__std::borrow::Cow::Borrowed(__lhs_field),
-                                __rhs.#variant_ident,
-                                ::fayalite::__std::borrow::Cow::Borrowed(__rhs_field),
-                            )
-                        }
-                    });
-                    variants_expr_eq.push(quote_spanned! {span=>
-                        {
-                            let (#match_variant_ident::#variant_ident(__lhs), __scope) =
-                                ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(
-                                    ::fayalite::__std::iter::Iterator::next(&mut __lhs_match_variant_iter)
-                                        .expect("known to have enough variants"),
-                                )
-                            else {
-                                ::fayalite::__std::unreachable!();
-                            };
-                            let (#match_variant_ident::#variant_ident(__rhs), __scope) =
-                                ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(
-                                    ::fayalite::__std::iter::Iterator::nth(
-                                        &mut ::fayalite::module::match_(__rhs),
-                                        #variant_index,
-                                    )
-                                        .expect("known to have variant"),
-                                )
-                            else {
-                                ::fayalite::__std::unreachable!();
-                            };
-                            ::fayalite::module::connect(__retval, ::fayalite::expr::HdlPartialEqImpl::cmp_expr_eq(__lhs, __rhs));
-                        }
-                    });
-                    fields_valueless_eq.push(quote_spanned! {span=>
-                        ::fayalite::expr::HdlPartialEqImpl::cmp_valueless_eq(
-                            ::fayalite::expr::Valueless::new(__lhs.#variant_ident),
-                            ::fayalite::expr::Valueless::new(__rhs.#variant_ident),
-                        )
-                    });
-                } else {
-                    variants_value_eq.push(quote_spanned! {span=>
-                        (#sim_value_ident::#variant_ident(_), #sim_value_ident::#variant_ident(_)) => true,
-                    });
-                    variants_expr_eq.push(quote_spanned! {span=>
-                        {
-                            let (#match_variant_ident::#variant_ident, __scope) =
-                                ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(
-                                    ::fayalite::__std::iter::Iterator::next(&mut __lhs_match_variant_iter)
-                                        .expect("known to have enough variants"),
-                                )
-                            else {
-                                ::fayalite::__std::unreachable!();
-                            };
-                            let (#match_variant_ident::#variant_ident, __scope) =
-                                ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(
-                                    ::fayalite::__std::iter::Iterator::nth(
-                                        &mut ::fayalite::module::match_(__rhs),
-                                        #variant_index,
-                                    )
-                                        .expect("known to have variant"),
-                                )
-                            else {
-                                ::fayalite::__std::unreachable!();
-                            };
-                            ::fayalite::module::connect(__retval, true);
-                        }
-                    });
-                }
-            }
-            if let Some(sim_value_unknown_variant_name) = &sim_value_unknown_variant_name {
-                variants_value_eq.push(quote_spanned! {span=>
-                    (#sim_value_ident::#sim_value_unknown_variant_name(__lhs_unknown), #sim_value_ident::#sim_value_unknown_variant_name(__rhs_unknown)) => {
-                        __lhs_unknown == __rhs_unknown
-                    }
-                });
-            }
-            let valueless_eq_body = if fields_valueless_eq.is_empty() {
-                quote_spanned! {span=>
-                    ::fayalite::expr::Valueless::new(::fayalite::int::Bool)
-                }
-            } else {
-                quote_spanned! {span=>
-                    let __lhs = ::fayalite::expr::ValueType::ty(&__lhs);
-                    let __rhs = ::fayalite::expr::ValueType::ty(&__rhs);
-                    #(#fields_valueless_eq)&*
-                }
-            };
-            let cmp_expr_eq_wire_name = format!("{ident}_cmp_eq");
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::expr::HdlPartialEqImpl<Self> for #target #type_generics
-                #cmp_eq_where_clause
-                {
-                    #[track_caller]
-                    fn cmp_value_eq(
-                        __lhs: Self,
-                        __lhs_value: ::fayalite::__std::borrow::Cow<'_, <Self as ::fayalite::ty::Type>::SimValue>,
-                        __rhs: Self,
-                        __rhs_value: ::fayalite::__std::borrow::Cow<'_, <Self as ::fayalite::ty::Type>::SimValue>,
-                    ) -> ::fayalite::__std::primitive::bool {
-                        match (&*__lhs_value, &*__rhs_value) {
-                            #(#variants_value_eq)*
-                            _ => false,
-                        }
-                    }
-
-                    #[track_caller]
-                    fn cmp_expr_eq(
-                        __lhs: ::fayalite::expr::Expr<Self>,
-                        __rhs: ::fayalite::expr::Expr<Self>,
-                    ) -> ::fayalite::expr::Expr<::fayalite::int::Bool> {
-                        let __retval = ::fayalite::module::wire(::fayalite::module::ImplicitName(#cmp_expr_eq_wire_name), ::fayalite::int::Bool);
-                        ::fayalite::module::connect(__retval, false);
-                        let mut __lhs_match_variant_iter = ::fayalite::module::match_(__lhs);
-                        #(#variants_expr_eq)*
-                        __retval
-                    }
-
-                    #[track_caller]
-                    fn cmp_valueless_eq(
-                        __lhs: ::fayalite::expr::Valueless<Self>,
-                        __rhs: ::fayalite::expr::Valueless<Self>,
-                    ) -> ::fayalite::expr::Valueless<::fayalite::int::Bool> {
-                        #valueless_eq_body
-                    }
-                }
-            }
-            .to_tokens(tokens);
-        }
         let variants_len = variants.len();
         quote_spanned! {span=>
             #[automatically_derived]
@@ -1151,7 +888,6 @@ impl ToTokens for ParsedEnum {
                         #(#sim_value_from_opaque_match_arms)*
                     }
                 }
-                #[allow(irrefutable_let_patterns)]
                 fn sim_value_clone_from_opaque(
                     &self,
                     value: &mut <Self as ::fayalite::ty::Type>::SimValue,
@@ -1197,14 +933,6 @@ impl ToTokens for ParsedEnum {
                 }
             }
             #[automatically_derived]
-            impl #impl_generics ::fayalite::__std::fmt::Debug for #sim_value_ident #type_generics
-            #where_clause
-            {
-                fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                    <#target #type_generics as ::fayalite::ty::SimValueDebug>::sim_value_debug(self, f)
-                }
-            }
-            #[automatically_derived]
             impl #impl_generics ::fayalite::sim::value::ToSimValueWithType<#target #type_generics>
             for #sim_value_ident #type_generics
             #where_clause

crates/fayalite-proc-macros-impl/src/hdl_type_alias.rs

@@ -215,8 +215,6 @@ impl ParsedTypeAlias {
             no_runtime_generics,
             cmp_eq,
             get: _,
-            ref custom_debug,
-            custom_sim_display,
         } = options.body;
         if let Some((no_static,)) = no_static {
             errors.error(no_static, "no_static is not valid on type aliases");
@@ -236,15 +234,6 @@ impl ParsedTypeAlias {
         if let Some((cmp_eq,)) = cmp_eq {
             errors.error(cmp_eq, "cmp_eq is not valid on type aliases");
         }
-        if let Some((custom_debug, _, _)) = custom_debug {
-            errors.error(custom_debug, "custom_debug is not valid on type aliases");
-        }
-        if let Some((custom_sim_display,)) = custom_sim_display {
-            errors.error(
-                custom_sim_display,
-                "custom_sim_display is not valid on type aliases",
-            );
-        }
         if let Some((custom_bounds,)) = custom_bounds {
             errors.error(
                 custom_bounds,
@@ -298,8 +287,6 @@ impl ParsedTypeAlias {
             no_runtime_generics: _,
             cmp_eq,
             ref mut get,
-            ref custom_debug,
-            custom_sim_display,
         } = options.body;
         if let Some(get) = get.take() {
             return Self::parse_phantom_const_accessor(
@@ -324,15 +311,6 @@ impl ParsedTypeAlias {
         if let Some((cmp_eq,)) = cmp_eq {
             errors.error(cmp_eq, "cmp_eq is not valid on type aliases");
         }
-        if let Some((custom_debug, _, _)) = custom_debug {
-            errors.error(custom_debug, "custom_debug is not valid on type aliases");
-        }
-        if let Some((custom_sim_display,)) = custom_sim_display {
-            errors.error(
-                custom_sim_display,
-                "custom_sim_display is not valid on type aliases",
-            );
-        }
         let generics = if custom_bounds.is_some() {
             MaybeParsed::Unrecognized(generics)
         } else if let Some(generics) = errors.ok(ParsedGenerics::parse(&mut generics)) {
@@ -378,8 +356,6 @@ impl ToTokens for ParsedTypeAlias {
                     no_runtime_generics,
                     cmp_eq: _,
                     get: _,
-                    custom_debug: _,
-                    custom_sim_display: _,
                 } = &options.body;
                 let target = get_target(target, ident);
                 let mut type_attrs = attrs.clone();
@@ -426,8 +402,6 @@ impl ToTokens for ParsedTypeAlias {
                     no_runtime_generics: _,
                     cmp_eq: _,
                     get: _,
-                    custom_debug: _,
-                    custom_sim_display: _,
                 } = &options.body;
                 let span = ident.span();
                 let mut type_attrs = attrs.clone();
@@ -453,7 +427,7 @@ impl ToTokens for ParsedTypeAlias {
                     format_ident!("__{}__GenericsAccumulation", ident);
                 ItemStruct {
                     attrs: vec![
-                        common_derives(span, true),
+                        common_derives(span),
                         parse_quote_spanned! {span=>
                             #[allow(non_camel_case_types)]
                         },

crates/fayalite-proc-macros-impl/src/hdl_type_common.rs

@@ -7,10 +7,10 @@ use std::{collections::HashMap, fmt, mem};
 use syn::{
     AngleBracketedGenericArguments, Attribute, Block, ConstParam, Expr, ExprBlock, ExprGroup,
     ExprIndex, ExprParen, ExprPath, ExprTuple, Field, FieldMutability, Fields, FieldsNamed,
-    FieldsUnnamed, FnArg, GenericArgument, GenericParam, Generics, Ident, ImplGenerics, Index,
+    FieldsUnnamed, GenericArgument, GenericParam, Generics, Ident, ImplGenerics, Index, ItemStruct,
-    ItemStruct, Path, PathArguments, PathSegment, PredicateType, QSelf, Stmt, Token, TraitBound,
+    Path, PathArguments, PathSegment, PredicateType, QSelf, Stmt, Token, TraitBound, Turbofish,
-    Turbofish, Type, TypeGenerics, TypeGroup, TypeParam, TypeParamBound, TypeParen, TypePath,
+    Type, TypeGenerics, TypeGroup, TypeParam, TypeParamBound, TypeParen, TypePath, TypeTuple,
-    TypeTuple, Visibility, WhereClause, WherePredicate,
+    Visibility, WhereClause, WherePredicate,
     parse::{Parse, ParseStream},
     parse_quote, parse_quote_spanned,
     punctuated::{Pair, Punctuated},
@@ -18,17 +18,6 @@ use syn::{
     token::{Brace, Bracket, Paren},
 };
 
-crate::options! {
-    #[options = CustomDebugOptions]
-    #[no_ident_fragment]
-    pub(crate) enum CustomDebugOption {
-        Type(type_),
-        Sim(sim),
-        MaskType(mask_type),
-        MaskSim(mask_sim),
-    }
-}
-
 crate::options! {
     #[options = ItemOptions]
     pub(crate) enum ItemOption {
@@ -39,8 +28,6 @@ crate::options! {
         NoRuntimeGenerics(no_runtime_generics),
         CmpEq(cmp_eq),
         Get(get, Expr),
-        CustomDebug(custom_debug, CustomDebugOptions),
-        CustomSimDisplay(custom_sim_display),
     }
 }
 
@@ -54,36 +41,8 @@ impl ItemOptions {
         {
             self.no_static = Some((kw::no_static(custom_bounds.span),));
         }
-        if let Some((kw, _, custom_debug)) = &mut self.custom_debug {
-            if let CustomDebugOptions {
-                type_: None,
-                sim: None,
-                mask_type: None,
-                mask_sim: None,
-            } = custom_debug
-            {
-                *custom_debug = CustomDebugOptions {
-                    type_: Some((kw::type_(kw.span),)),
-                    sim: Some((kw::sim(kw.span),)),
-                    mask_type: None,
-                    mask_sim: None,
-                };
-            }
-        }
         Ok(())
     }
-    pub(crate) fn custom_debug(&self) -> &CustomDebugOptions {
-        self.custom_debug.as_ref().map(|v| &v.2).unwrap_or(
-            const {
-                &CustomDebugOptions {
-                    type_: None,
-                    sim: None,
-                    mask_type: None,
-                    mask_sim: None,
-                }
-            },
-        )
-    }
 }
 
 pub(crate) struct WrappedInConst<'a> {
@@ -125,17 +84,10 @@ pub(crate) fn get_target(target: &Option<(kw::target, Paren, Path)>, item_ident:
     }
 }
 
-pub(crate) fn common_derives(span: Span, include_debug: bool) -> Attribute {
+pub(crate) fn common_derives(span: Span) -> Attribute {
-    let debug = include_debug
-        .then(|| {
-            quote_spanned! {span=>
-                ::fayalite::__std::fmt::Debug
-            }
-        })
-        .into_iter();
     parse_quote_spanned! {span=>
         #[::fayalite::__std::prelude::v1::derive(
-            #(#debug,)*
+            ::fayalite::__std::fmt::Debug,
             ::fayalite::__std::cmp::Eq,
             ::fayalite::__std::cmp::PartialEq,
             ::fayalite::__std::hash::Hash,
@@ -3023,7 +2975,7 @@ impl ParsedGenerics {
         let span = ident.span();
         ItemStruct {
             attrs: vec![
-                common_derives(span, true),
+                common_derives(span),
                 parse_quote_spanned! {span=>
                     #[allow(non_camel_case_types)]
                 },
@@ -4781,109 +4733,3 @@ impl ParsedVisibility {
             .map(|ord| if ord.is_lt() { self } else { other })
     }
 }
-
-pub(crate) struct CustomDebugTrait<'a> {
-    pub(crate) trait_path: &'a Path,
-    pub(crate) fn_name: &'a Ident,
-    pub(crate) this_arg: &'a FnArg,
-}
-
-#[must_use]
-pub(crate) fn create_struct_debug_impl(
-    item_struct: &ItemStruct,
-    debug_struct_name: &str,
-    custom_debug_trait: Option<CustomDebugTrait<'_>>,
-) -> TokenStream {
-    let ident = &item_struct.ident;
-    let span = ident.span();
-    let (impl_generics, type_generics, where_clause) = item_struct.generics.split_for_impl();
-    let trait_path;
-    let fn_name;
-    let this_arg;
-    let CustomDebugTrait {
-        trait_path,
-        fn_name,
-        this_arg,
-    } = match custom_debug_trait {
-        Some(v) => v,
-        None => {
-            trait_path = parse_quote_spanned! {span=>
-                ::fayalite::__std::fmt::Debug
-            };
-            fn_name = parse_quote_spanned! {span=>
-                fmt
-            };
-            this_arg = parse_quote_spanned! {span=>
-                &self
-            };
-            CustomDebugTrait {
-                trait_path: &trait_path,
-                fn_name: &fn_name,
-                this_arg: &this_arg,
-            }
-        }
-    };
-    let this_arg_name = match this_arg {
-        FnArg::Receiver(this_arg) => this_arg.self_token.to_token_stream(),
-        FnArg::Typed(this_arg) => match &*this_arg.pat {
-            syn::Pat::Ident(pat_ident) => pat_ident.ident.to_token_stream(),
-            _ => unreachable!(),
-        },
-    };
-    match &item_struct.fields {
-        Fields::Named(fields) => {
-            let field_idents = fields
-                .named
-                .iter()
-                .map(|v| v.ident.as_ref().expect("known to have field name"));
-            let field_names = field_idents.clone().map(|v| v.to_string());
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics #trait_path for #ident #type_generics
-                #where_clause
-                {
-                    fn #fn_name(#this_arg, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                        let _ = #this_arg_name;
-                        f.debug_struct(#debug_struct_name)
-                            #(.field(#field_names, &#this_arg_name.#field_idents))*
-                            .finish()
-                    }
-                }
-            }
-        }
-        Fields::Unnamed(fields) => {
-            let field_members = fields
-                .unnamed
-                .iter()
-                .enumerate()
-                .map(|(index, _)| syn::Index {
-                    index: index as _,
-                    span,
-                });
-            quote_spanned! {span=>
-                #[automatically_derived]
-                impl #impl_generics #trait_path for #ident #type_generics
-                #where_clause
-                {
-                    fn #fn_name(#this_arg, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                        let _ = #this_arg_name;
-                        f.debug_tuple(#debug_struct_name)
-                            #(.field(&#this_arg_name.#field_members))*
-                            .finish()
-                    }
-                }
-            }
-        }
-        Fields::Unit => quote_spanned! {ident.span()=>
-            #[automatically_derived]
-            impl #impl_generics #trait_path for #ident #type_generics
-            #where_clause
-            {
-                fn #fn_name(#this_arg, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
-                    let _ = #this_arg_name;
-                    f.write_str(#debug_struct_name)
-                }
-            }
-        },
-    }
-}

crates/fayalite-proc-macros-impl/src/lib.rs

@@ -42,7 +42,6 @@ pub(crate) trait CustomToken:
 
 mod kw {
     pub(crate) use syn::token::Extern as extern_;
-    pub(crate) use syn::token::Type as type_;
 
     macro_rules! custom_keyword {
         ($kw:ident) => {
@@ -76,8 +75,6 @@ mod kw {
     custom_keyword!(cmp_eq);
     custom_keyword!(connect_inexact);
     custom_keyword!(custom_bounds);
-    custom_keyword!(custom_debug);
-    custom_keyword!(custom_sim_display);
     custom_keyword!(flip);
     custom_keyword!(get);
     custom_keyword!(hdl);
@@ -86,8 +83,6 @@ mod kw {
     custom_keyword!(input);
     custom_keyword!(instance);
     custom_keyword!(m);
-    custom_keyword!(mask_sim);
-    custom_keyword!(mask_type);
     custom_keyword!(memory);
     custom_keyword!(memory_array);
     custom_keyword!(memory_with_init);

crates/fayalite/Cargo.toml

@@ -26,12 +26,10 @@ hashbrown.workspace = true
 jobslot.workspace = true
 num-bigint.workspace = true
 num-traits.workspace = true
-once_cell.workspace = true
 ordered-float.workspace = true
 petgraph.workspace = true
 serde_json.workspace = true
 serde.workspace = true
-sha2.workspace = true
 tempfile.workspace = true
 vec_map.workspace = true
 which.workspace = true

crates/fayalite/src/array.rs

@@ -13,13 +13,13 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, MatchVariantWithoutScope, OpaqueSimValueSlice, OpaqueSimValueWriter,
-        OpaqueSimValueWritten, SimValueDebug, StaticType, Type, TypeProperties, TypeWithDeref,
+        OpaqueSimValueWritten, StaticType, Type, TypeProperties, TypeWithDeref,
         serde_impls::SerdeCanonicalType,
     },
     util::ConstUsize,
 };
 use serde::{Deserialize, Deserializer, Serialize, Serializer, de::Error};
-use std::{borrow::Cow, fmt, iter::FusedIterator, ops::Index};
+use std::{borrow::Cow, iter::FusedIterator, ops::Index};
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash)]
 pub struct ArrayType<T: Type = CanonicalType, Len: Size = DynSize> {
@@ -28,8 +28,8 @@ pub struct ArrayType<T: Type = CanonicalType, Len: Size = DynSize> {
     type_properties: TypeProperties,
 }
 
-impl<T: Type, Len: Size> fmt::Debug for ArrayType<T, Len> {
+impl<T: Type, Len: Size> std::fmt::Debug for ArrayType<T, Len> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "Array<{:?}, {}>", self.element, self.len())
     }
 }
@@ -109,42 +109,14 @@ impl<T: StaticType, Len: KnownSize> Default for ArrayType<T, Len> {
     }
 }
 
-struct MakeType<T: StaticType>(Interned<T>);
-
-impl<T: StaticType> From<MakeType<T>> for Interned<T> {
-    fn from(value: MakeType<T>) -> Self {
-        value.0
-    }
-}
-
-impl<T: StaticType> Default for MakeType<T> {
-    fn default() -> Self {
-        Self(T::TYPE.intern_sized())
-    }
-}
-
-struct MakeMaskType<T: StaticType>(Interned<T::MaskType>);
-
-impl<T: StaticType> From<MakeMaskType<T>> for Interned<T::MaskType> {
-    fn from(value: MakeMaskType<T>) -> Self {
-        value.0
-    }
-}
-
-impl<T: StaticType> Default for MakeMaskType<T> {
-    fn default() -> Self {
-        Self(T::MASK_TYPE.intern_sized())
-    }
-}
-
 impl<T: StaticType, Len: KnownSize> StaticType for ArrayType<T, Len> {
     const TYPE: Self = Self {
-        element: LazyInterned::new_const::<MakeType<T>>(),
+        element: LazyInterned::new_lazy(&|| T::TYPE.intern_sized()),
         len: Len::SIZE,
         type_properties: Self::TYPE_PROPERTIES,
     };
     const MASK_TYPE: Self::MaskType = ArrayType::<T::MaskType, Len> {
-        element: LazyInterned::new_const::<MakeMaskType<T>>(),
+        element: LazyInterned::new_lazy(&|| T::MASK_TYPE.intern_sized()),
         len: Len::SIZE,
         type_properties: Self::MASK_TYPE_PROPERTIES,
     };
@@ -182,15 +154,6 @@ impl<T: Type + Visit<State>, Len: Size, State: Visitor + ?Sized> Visit<State>
     }
 }
 
-impl<T: Type, Len: Size> SimValueDebug for ArrayType<T, Len> {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl<T: Type, Len: Size> Type for ArrayType<T, Len> {
     type BaseType = Array;
     type MaskType = ArrayType<T::MaskType, Len>;

crates/fayalite/src/bundle.rs

@@ -14,8 +14,8 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, MatchVariantWithoutScope, OpaqueSimValue, OpaqueSimValueSize,
-        OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten, SimValueDebug,
+        OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten, StaticType, Type,
-        StaticType, Type, TypeProperties, TypeWithDeref, impl_match_variant_as_self,
+        TypeProperties, TypeWithDeref, impl_match_variant_as_self,
     },
     util::HashMap,
 };
@@ -271,15 +271,6 @@ impl Type for Bundle {
     }
 }
 
-impl SimValueDebug for Bundle {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 pub trait BundleType: Type<BaseType = Bundle> {
     type Builder: Default;
     fn fields(&self) -> Interned<[BundleField]>;
@@ -480,14 +471,6 @@ macro_rules! impl_tuples {
                 #[var($var)]
             })*]
         }
-        impl<$($T: Type,)*> SimValueDebug for ($($T,)*) {
-            fn sim_value_debug(
-                value: &<Self as Type>::SimValue,
-                f: &mut fmt::Formatter<'_>,
-            ) -> fmt::Result {
-                fmt::Debug::fmt(value, f)
-            }
-        }
         impl<$($T: Type,)*> Type for ($($T,)*) {
             type BaseType = Bundle;
             type MaskType = ($($T::MaskType,)*);
@@ -790,15 +773,6 @@ impl_tuples! {
     ]
 }
 
-impl<T: ?Sized + Send + Sync + 'static> SimValueDebug for PhantomData<T> {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl<T: ?Sized + Send + Sync + 'static> Type for PhantomData<T> {
     type BaseType = Bundle;
     type MaskType = ();

crates/fayalite/src/clock.rs

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
-
 use crate::{
     expr::{Expr, ValueType},
     hdl,
@@ -10,12 +9,10 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, OpaqueSimValueSize, OpaqueSimValueSlice, OpaqueSimValueWriter,
-        OpaqueSimValueWritten, SimValueDebug, StaticType, Type, TypeProperties,
+        OpaqueSimValueWritten, StaticType, Type, TypeProperties, impl_match_variant_as_self,
-        impl_match_variant_as_self,
     },
 };
 use bitvec::{bits, order::Lsb0};
-use std::fmt;
 
 #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
 pub struct Clock;
@@ -72,15 +69,6 @@ impl Type for Clock {
     }
 }
 
-impl SimValueDebug for Clock {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl Clock {
     pub fn type_properties(self) -> TypeProperties {
         Self::TYPE_PROPERTIES

crates/fayalite/src/enum_.rs

@@ -2,7 +2,7 @@
 // See Notices.txt for copyright information
 
 use crate::{
-    expr::{Expr, ToExpr, ValueType, ops::VariantAccess},
+    expr::{Expr, HdlPartialEq, HdlPartialEqImpl, ToExpr, ValueType, ops::VariantAccess},
     hdl,
     int::{Bool, UIntValue},
     intern::{Intern, Interned},
@@ -10,18 +10,18 @@ use crate::{
         EnumMatchVariantAndInactiveScopeImpl, EnumMatchVariantsIterImpl, Scope, connect,
         enum_match_variants_helper, incomplete_wire, wire,
     },
-    sim::value::{SimValue, ToSimValue, ToSimValueWithType},
+    sim::value::SimValue,
     source_location::SourceLocation,
     ty::{
         CanonicalType, MatchVariantAndInactiveScope, OpaqueSimValue, OpaqueSimValueSize,
-        OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten, SimValueDebug,
+        OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten, StaticType, Type,
-        StaticType, Type, TypeProperties,
+        TypeProperties,
     },
     util::HashMap,
 };
 use bitvec::{order::Lsb0, slice::BitSlice, view::BitView};
 use serde::{Deserialize, Serialize};
-use std::{convert::Infallible, fmt, iter::FusedIterator, sync::Arc};
+use std::{borrow::Cow, convert::Infallible, fmt, iter::FusedIterator, sync::Arc};
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, Serialize, Deserialize)]
 pub struct EnumVariant {
@@ -410,15 +410,6 @@ impl Type for Enum {
     }
 }
 
-impl SimValueDebug for Enum {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 #[derive(Clone, PartialEq, Eq, Hash, Debug, Default)]
 pub struct EnumPaddingSimValue {
     bits: Option<UIntValue>,
@@ -732,12 +723,95 @@ pub fn enum_type_to_sim_builder<T: EnumType>(v: T) -> T::SimBuilder {
     v.into()
 }
 
-#[hdl(cmp_eq)]
+#[hdl]
 pub enum HdlOption<T: Type> {
     HdlNone,
     HdlSome(T),
 }
 
+impl<Lhs: Type + HdlPartialEqImpl<Rhs>, Rhs: Type> HdlPartialEqImpl<HdlOption<Rhs>>
+    for HdlOption<Lhs>
+{
+    fn cmp_value_eq(
+        lhs: Self,
+        lhs_value: Cow<'_, Self::SimValue>,
+        rhs: HdlOption<Rhs>,
+        rhs_value: Cow<'_, <HdlOption<Rhs> as Type>::SimValue>,
+    ) -> bool {
+        type SimValueMatch<T> = <T as Type>::SimValue;
+        match (&*lhs_value, &*rhs_value) {
+            (SimValueMatch::<Self>::HdlNone(_), SimValueMatch::<HdlOption<Rhs>>::HdlNone(_)) => {
+                true
+            }
+            (SimValueMatch::<Self>::HdlSome(..), SimValueMatch::<HdlOption<Rhs>>::HdlNone(_))
+            | (SimValueMatch::<Self>::HdlNone(_), SimValueMatch::<HdlOption<Rhs>>::HdlSome(..)) => {
+                false
+            }
+            (
+                SimValueMatch::<Self>::HdlSome(l, _),
+                SimValueMatch::<HdlOption<Rhs>>::HdlSome(r, _),
+            ) => HdlPartialEqImpl::cmp_value_eq(
+                lhs.HdlSome,
+                Cow::Borrowed(&**l),
+                rhs.HdlSome,
+                Cow::Borrowed(&**r),
+            ),
+        }
+    }
+
+    #[hdl]
+    fn cmp_expr_eq(lhs: Expr<Self>, rhs: Expr<HdlOption<Rhs>>) -> Expr<Bool> {
+        #[hdl]
+        let cmp_eq = wire();
+        #[hdl]
+        match lhs {
+            HdlSome(lhs) =>
+            {
+                #[hdl]
+                match rhs {
+                    HdlSome(rhs) => connect(cmp_eq, lhs.cmp_eq(rhs)),
+                    HdlNone => connect(cmp_eq, false),
+                }
+            }
+            HdlNone =>
+            {
+                #[hdl]
+                match rhs {
+                    HdlSome(_) => connect(cmp_eq, false),
+                    HdlNone => connect(cmp_eq, true),
+                }
+            }
+        }
+        cmp_eq
+    }
+
+    #[hdl]
+    fn cmp_expr_ne(lhs: Expr<Self>, rhs: Expr<HdlOption<Rhs>>) -> Expr<Bool> {
+        #[hdl]
+        let cmp_ne = wire();
+        #[hdl]
+        match lhs {
+            HdlSome(lhs) =>
+            {
+                #[hdl]
+                match rhs {
+                    HdlSome(rhs) => connect(cmp_ne, lhs.cmp_ne(rhs)),
+                    HdlNone => connect(cmp_ne, true),
+                }
+            }
+            HdlNone =>
+            {
+                #[hdl]
+                match rhs {
+                    HdlSome(_) => connect(cmp_ne, true),
+                    HdlNone => connect(cmp_ne, false),
+                }
+            }
+        }
+        cmp_ne
+    }
+}
+
 #[allow(non_snake_case)]
 pub fn HdlNone<T: StaticType>() -> Expr<HdlOption<T>> {
     HdlOption[T::TYPE].HdlNone()
@@ -749,123 +823,6 @@ pub fn HdlSome<T: Type>(value: impl ToExpr<Type = T>) -> Expr<HdlOption<T>> {
     HdlOption[value.ty()].HdlSome(value)
 }
 
-impl<T: Type> From<SimValue<HdlOption<T>>> for Option<SimValue<T>> {
-    #[hdl]
-    fn from(value: SimValue<HdlOption<T>>) -> Self {
-        #[hdl(sim)]
-        match value {
-            HdlSome(v) => Some(v),
-            HdlNone => None,
-        }
-    }
-}
-
-impl<'a, T: Type> From<&'a SimValue<HdlOption<T>>> for Option<&'a SimValue<T>> {
-    #[hdl]
-    fn from(value: &'a SimValue<HdlOption<T>>) -> Self {
-        #[hdl(sim)]
-        match value {
-            HdlSome(v) => Some(v),
-            HdlNone => None,
-        }
-    }
-}
-
-impl<'a, T: Type> From<&'a mut SimValue<HdlOption<T>>> for Option<&'a mut SimValue<T>> {
-    #[hdl]
-    fn from(value: &'a mut SimValue<HdlOption<T>>) -> Self {
-        #[hdl(sim)]
-        match value {
-            HdlSome(v) => Some(v),
-            HdlNone => None,
-        }
-    }
-}
-
-impl<T: ValueType<Type: StaticType<MaskType: StaticType>>> ValueType for Option<T> {
-    type Type = HdlOption<T::Type>;
-    type ValueCategory = T::ValueCategory;
-
-    fn ty(&self) -> Self::Type {
-        StaticType::TYPE
-    }
-}
-
-impl<T: Type, V: ToSimValueWithType<T>> ToSimValueWithType<HdlOption<T>> for Option<V> {
-    #[hdl]
-    fn to_sim_value_with_type(&self, ty: HdlOption<T>) -> SimValue<HdlOption<T>> {
-        match self {
-            Some(v) =>
-            {
-                #[hdl(sim)]
-                ty.HdlSome(v)
-            }
-            None =>
-            {
-                #[hdl(sim)]
-                ty.HdlNone()
-            }
-        }
-    }
-    #[hdl]
-    fn into_sim_value_with_type(self, ty: HdlOption<T>) -> SimValue<HdlOption<T>> {
-        match self {
-            Some(v) =>
-            {
-                #[hdl(sim)]
-                ty.HdlSome(v)
-            }
-            None =>
-            {
-                #[hdl(sim)]
-                ty.HdlNone()
-            }
-        }
-    }
-}
-
-impl<T: ToSimValue<Type: StaticType<MaskType: StaticType>>> ToSimValue for Option<T> {
-    #[hdl]
-    fn to_sim_value(&self) -> SimValue<Self::Type> {
-        match self {
-            Some(v) =>
-            {
-                #[hdl(sim)]
-                HdlSome(v)
-            }
-            None =>
-            {
-                #[hdl(sim)]
-                HdlNone()
-            }
-        }
-    }
-    #[hdl]
-    fn into_sim_value(self) -> SimValue<Self::Type> {
-        match self {
-            Some(v) =>
-            {
-                #[hdl(sim)]
-                HdlSome(v)
-            }
-            None =>
-            {
-                #[hdl(sim)]
-                HdlNone()
-            }
-        }
-    }
-}
-
-impl<T: ToExpr<Type: StaticType<MaskType: StaticType>>> ToExpr for Option<T> {
-    fn to_expr(&self) -> Expr<Self::Type> {
-        match self {
-            Some(v) => HdlSome(v),
-            None => HdlNone(),
-        }
-    }
-}
-
 impl<T: Type> HdlOption<T> {
     #[track_caller]
     pub fn try_map<R: Type, E>(

crates/fayalite/src/expr/ops.rs

@@ -579,8 +579,6 @@ macro_rules! make_impls {
     (#[kind(i64)] $($rest:tt)*) => {make_impls! { #[type([][] (i64))] $($rest)* }};
     (#[kind(i128)] $($rest:tt)*) => {make_impls! { #[type([][] (i128))] $($rest)* }};
 }
-
-#[cfg(test)]
 pub(crate) use make_impls;
 
 #[cfg(test)]

crates/fayalite/src/int.rs

@@ -10,13 +10,13 @@ use crate::{
         value_category::ValueCategoryValue,
     },
     hdl,
-    intern::{Intern, Interned, Memoize, OnceInterned},
+    intern::{Intern, Interned, Memoize},
     sim::value::{SimValue, ToSimValueWithType},
     source_location::SourceLocation,
     ty::{
         CanonicalType, FillInDefaultedGenerics, OpaqueSimValueSize, OpaqueSimValueSlice,
-        OpaqueSimValueWriter, OpaqueSimValueWritten, SimValueDebug, SimValueDisplay, StaticType,
+        OpaqueSimValueWriter, OpaqueSimValueWritten, StaticType, Type, TypeProperties,
-        Type, TypeProperties, impl_match_variant_as_self,
+        impl_match_variant_as_self,
     },
     util::{ConstBool, ConstUsize, GenericConstBool, GenericConstUsize, interned_bit, slice_range},
 };
@@ -65,21 +65,14 @@ pub type DynSize = ConstUsize<DYN_SIZE>;
 
 trait KnownSizeBaseSealed {}
 
-impl<const N: usize> KnownSizeBaseSealed for ConstUsize<N> {}
+impl<const N: usize> KnownSizeBaseSealed for [(); N] {}
 
 #[expect(private_bounds)]
-pub trait KnownSizeBase: KnownSizeBaseSealed + GetInternedIntCaches {}
+pub trait KnownSizeBase: KnownSizeBaseSealed {}
 
 macro_rules! impl_known_size_base {
     ($($size:literal),* $(,)?) => {
-        $(impl KnownSizeBase for ConstUsize<$size> {})*
+        $(impl KnownSizeBase for [(); $size] {})*
-        $(impl GetInternedIntCaches for ConstUsize<$size> {
-            #[inline(always)]
-            fn get_interned_int_caches() -> &'static InternedIntCaches<Self> {
-                static CACHES: InternedIntCaches<ConstUsize<$size>> = InternedIntCaches::new();
-                &CACHES
-            }
-        })*
     };
 }
 
@@ -120,34 +113,12 @@ impl_known_size_base! {
     0x200,
 }
 
-trait GetInternedIntCaches {
-    fn get_interned_int_caches() -> &'static InternedIntCaches<Self>
-    where
-        Self: KnownSize;
-}
-
-struct InternedIntCaches<Width: KnownSize> {
-    uint: OnceInterned<UIntType<Width>>,
-    sint: OnceInterned<SIntType<Width>>,
-}
-
-impl<Width: KnownSize> InternedIntCaches<Width> {
-    const fn new() -> Self {
-        Self {
-            uint: OnceInterned::new(),
-            sint: OnceInterned::new(),
-        }
-    }
-}
-
-#[expect(private_bounds)]
 pub trait KnownSize:
     GenericConstUsize
     + sealed::SizeTypeSealed
     + sealed::SizeSealed
     + Default
     + FillInDefaultedGenerics<Type = Self>
-    + GetInternedIntCaches
 {
     const SIZE: Self;
     type ArrayMatch<Element: Type>: AsRef<[Expr<Element>]>
@@ -177,7 +148,7 @@ pub trait KnownSize:
 
 impl<const N: usize> KnownSize for ConstUsize<N>
 where
-    ConstUsize<N>: KnownSizeBase,
+    [(); N]: KnownSizeBase,
 {
     const SIZE: Self = Self;
     type ArrayMatch<Element: Type> = [Expr<Element>; N];
@@ -250,10 +221,6 @@ pub trait Size:
     fn from_usize(v: usize) -> Self::SizeType {
         Self::try_from_usize(v).expect("wrong size")
     }
-    #[doc(hidden)]
-    fn interned_uint(size_type: Self::SizeType) -> Interned<UIntType<Self>>;
-    #[doc(hidden)]
-    fn interned_sint(size_type: Self::SizeType) -> Interned<SIntType<Self>>;
 }
 
 impl sealed::SizeTypeSealed for usize {}
@@ -262,8 +229,6 @@ impl SizeType for usize {
     type Size = DynSize;
 }
 
-const MAX_CACHED_INT_WIDTH: usize = 1 << 10;
-
 impl Size for DynSize {
     type ArrayMatch<Element: Type> = Box<[Expr<Element>]>;
     type ArraySimValue<Element: Type> = Box<[SimValue<Element>]>;
@@ -277,36 +242,6 @@ impl Size for DynSize {
     fn try_from_usize(v: usize) -> Option<Self::SizeType> {
         Some(v)
     }
-
-    #[doc(hidden)]
-    fn interned_uint(size_type: Self::SizeType) -> Interned<UIntType<Self>> {
-        static CACHED: [OnceInterned<UInt>; MAX_CACHED_INT_WIDTH] =
-            [const { OnceInterned::new() }; _];
-        #[cold]
-        fn intern_cold(width: usize) -> Interned<UInt> {
-            Intern::intern_sized(UInt::new(width))
-        }
-        if let Some(cached) = CACHED.get(size_type) {
-            cached.get_or_init(|| intern_cold(size_type))
-        } else {
-            intern_cold(size_type)
-        }
-    }
-
-    #[doc(hidden)]
-    fn interned_sint(size_type: Self::SizeType) -> Interned<SIntType<Self>> {
-        static CACHED: [OnceInterned<SInt>; MAX_CACHED_INT_WIDTH] =
-            [const { OnceInterned::new() }; _];
-        #[cold]
-        fn intern_cold(width: usize) -> Interned<SInt> {
-            Intern::intern_sized(SInt::new(width))
-        }
-        if let Some(cached) = CACHED.get(size_type) {
-            cached.get_or_init(|| intern_cold(size_type))
-        } else {
-            intern_cold(size_type)
-        }
-    }
 }
 
 impl<const VALUE: usize> sealed::SizeSealed for ConstUsize<VALUE> {}
@@ -332,20 +267,6 @@ impl<T: KnownSize> Size for T {
     fn try_from_usize(v: usize) -> Option<Self::SizeType> {
         if v == T::VALUE { Some(T::SIZE) } else { None }
     }
-
-    #[doc(hidden)]
-    fn interned_uint(_size_type: Self::SizeType) -> Interned<UIntType<Self>> {
-        T::get_interned_int_caches()
-            .uint
-            .get_or_init(|| UIntType::new_static().intern_sized())
-    }
-
-    #[doc(hidden)]
-    fn interned_sint(_size_type: Self::SizeType) -> Interned<SIntType<Self>> {
-        T::get_interned_int_caches()
-            .sint
-            .get_or_init(|| SIntType::new_static().intern_sized())
-    }
 }
 
 #[derive(Clone, PartialEq, Eq, Debug)]
@@ -665,7 +586,7 @@ macro_rules! impl_valueless_op_forward {
 }
 
 macro_rules! impl_int {
-    ($pretty_name:ident, $name:ident, $generic_name:ident, $value:ident, $SIGNED:literal, $interned_int:ident) => {
+    ($pretty_name:ident, $name:ident, $generic_name:ident, $value:ident, $SIGNED:literal) => {
         #[derive(Copy, Clone, PartialEq, Eq, Hash)]
         #[repr(transparent)]
         pub struct $name<Width: Size = DynSize> {
@@ -1019,24 +940,6 @@ macro_rules! impl_int {
             }
         }
 
-        impl<Width: Size> SimValueDebug for $name<Width> {
-            fn sim_value_debug(
-                value: &<Self as Type>::SimValue,
-                f: &mut fmt::Formatter<'_>,
-            ) -> fmt::Result {
-                fmt::Debug::fmt(value, f)
-            }
-        }
-
-        impl<Width: Size> SimValueDisplay for $name<Width> {
-            fn sim_value_display(
-                value: &<Self as Type>::SimValue,
-                f: &mut fmt::Formatter<'_>,
-            ) -> fmt::Result {
-                fmt::Display::fmt(value, f)
-            }
-        }
-
         impl<Width: KnownSize> Default for $name<Width> {
             fn default() -> Self {
                 Self::TYPE
@@ -1100,7 +1003,7 @@ macro_rules! impl_int {
             type Output = $name<Width::Size>;
 
             fn index(&self, width: Width) -> &Self::Output {
-                Interned::into_inner(Width::Size::$interned_int(width))
+                Interned::into_inner(Intern::intern_sized($name::new(width)))
             }
         }
 
@@ -1281,22 +1184,8 @@ macro_rules! impl_int {
     };
 }
 
-impl_int!(
+impl_int!(UInt, UIntType, UIntWithoutGenerics, UIntValue, false);
-    UInt,
+impl_int!(SInt, SIntType, SIntWithoutGenerics, SIntValue, true);
-    UIntType,
-    UIntWithoutGenerics,
-    UIntValue,
-    false,
-    interned_uint
-);
-impl_int!(
-    SInt,
-    SIntType,
-    SIntWithoutGenerics,
-    SIntValue,
-    true,
-    interned_sint
-);
 
 impl UInt {
     /// gets the smallest `UInt` that fits `v` losslessly
@@ -1917,15 +1806,6 @@ impl Type for Bool {
     }
 }
 
-impl SimValueDebug for Bool {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl StaticType for Bool {
     const TYPE: Self = Bool;
     const MASK_TYPE: Self::MaskType = Bool;

crates/fayalite/src/int/uint_in_range.rs

@@ -14,7 +14,7 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten,
-        SimValueDebug, StaticType, Type, TypeProperties, impl_match_variant_as_self,
+        StaticType, Type, TypeProperties, impl_match_variant_as_self,
     },
 };
 use bitvec::{order::Lsb0, view::BitView};
@@ -94,15 +94,6 @@ impl Type for UIntInRangeMaskType {
     }
 }
 
-impl SimValueDebug for UIntInRangeMaskType {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl BundleType for UIntInRangeMaskType {
     type Builder = NoBuilder;
 
@@ -348,15 +339,6 @@ macro_rules! define_uint_in_range_type {
             }
         }
 
-        impl<Start: Size, End: Size> SimValueDebug for $UIntInRangeType<Start, End> {
-            fn sim_value_debug(
-                value: &<Self as Type>::SimValue,
-                f: &mut fmt::Formatter<'_>,
-            ) -> fmt::Result {
-                fmt::Debug::fmt(value, f)
-            }
-        }
-
         impl<Start: Size, End: Size> fmt::Debug for $UIntInRangeType<Start, End> {
             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 let Self { value, range } = self;

crates/fayalite/src/intern.rs

@@ -4,191 +4,68 @@
 use crate::{intern::type_map::TypeIdMap, util::DefaultBuildHasher};
 use bitvec::{ptr::BitPtr, slice::BitSlice, vec::BitVec};
 use hashbrown::HashTable;
-use once_cell::race::OnceRef;
 use serde::{Deserialize, Serialize};
 use std::{
     any::{Any, TypeId},
     borrow::{Borrow, Cow},
-    cell::RefCell,
     cmp::Ordering,
     ffi::{OsStr, OsString},
     fmt,
     hash::{BuildHasher, Hash, Hasher},
     iter::FusedIterator,
+    marker::PhantomData,
     ops::Deref,
     path::{Path, PathBuf},
-    sync::RwLock,
+    sync::{Mutex, RwLock},
 };
 
-mod interner;
 mod type_map;
 
-/// invariant: T must be zero-sized, `type_id` is unique for every possible T value.
+pub trait LazyInternedTrait<T: ?Sized + Send + Sync + 'static>: Send + Sync + Any {
-struct LazyInternedLazyInner<T: ?Sized + 'static> {
+    fn get(&self) -> Interned<T>;
-    type_id: TypeId,
-    value: T,
 }
 
-impl<T: ?Sized + 'static> Hash for LazyInternedLazyInner<T> {
+impl<T: ?Sized + Send + Sync + 'static, F: ?Sized + Fn() -> Interned<T> + Send + Sync + Any>
-    fn hash<H: Hasher>(&self, state: &mut H) {
+    LazyInternedTrait<T> for F
-        let Self { type_id, value: _ } = self;
+{
-        type_id.hash(state);
+    fn get(&self) -> Interned<T> {
+        self()
     }
 }
 
-impl<T: ?Sized + 'static> PartialEq for LazyInternedLazyInner<T> {
+#[repr(transparent)]
-    fn eq(&self, other: &Self) -> bool {
+pub struct LazyInternedFn<T: ?Sized + Send + Sync + 'static>(pub &'static dyn LazyInternedTrait<T>);
-        let Self { type_id, value: _ } = self;
-        *type_id == other.type_id
-    }
-}
 
-impl<T: ?Sized + 'static> Eq for LazyInternedLazyInner<T> {}
+impl<T: ?Sized + Send + Sync + 'static> Copy for LazyInternedFn<T> {}
 
-impl<T: ?Sized + 'static> fmt::Debug for LazyInternedLazyInner<T> {
+impl<T: ?Sized + Send + Sync + 'static> Clone for LazyInternedFn<T> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("LazyInternedLazyInner")
-            .finish_non_exhaustive()
-    }
-}
-
-impl<T: ?Sized + 'static> LazyInternedLazyInner<T> {
-    const fn new(value: T) -> Self
-    where
-        T: Sized,
-    {
-        const { assert!(size_of::<T>() == 0) };
-        Self {
-            type_id: TypeId::of::<T>(),
-            value,
-        }
-    }
-}
-
-pub struct LazyInternedLazy<T: ?Sized + Send + Sync + 'static>(
-    &'static LazyInternedLazyInner<dyn Fn() -> Interned<T> + Send + Sync>,
-);
-
-impl<T: ?Sized + Send + Sync + 'static> LazyInternedLazy<T> {
-    pub const fn new_const<V: Default + Into<Interned<T>>>() -> Self {
-        Self(&const { LazyInternedLazyInner::new(|| V::default().into()) })
-    }
-    pub const fn new_const_default() -> Self
-    where
-        Interned<T>: Default,
-    {
-        Self::new_const::<Interned<T>>()
-    }
-    pub fn interned(self) -> Interned<T> {
-        struct Map(hashbrown::HashTable<(TypeId, &'static (dyn Any + Send + Sync))>);
-        impl Map {
-            const EMPTY: Self = Self(hashbrown::HashTable::new());
-            fn get<T: ?Sized + Send + Sync + 'static>(
-                &self,
-                lazy_interned_lazy: LazyInternedLazy<T>,
-                hash: u64,
-            ) -> Option<&'static Interned<T>> {
-                let &(_, v) = self.0.find(hash, |v| v.0 == lazy_interned_lazy.0.type_id)?;
-                let Some(retval) = v.downcast_ref::<Interned<T>>() else {
-                    unreachable!();
-                };
-                Some(retval)
-            }
-            fn get_or_insert<T: ?Sized + Send + Sync + 'static>(
-                &mut self,
-                lazy_interned_lazy: LazyInternedLazy<T>,
-                hash: u64,
-                v: &'static Interned<T>,
-            ) -> &'static Interned<T> {
-                let entry = self
-                    .0
-                    .entry(
-                        hash,
-                        |&(k, _)| k == lazy_interned_lazy.0.type_id,
-                        |&(k, _)| type_map::TypeIdBuildHasher.hash_one(k),
-                    )
-                    .or_insert_with(|| (lazy_interned_lazy.0.type_id, v));
-                let &(_, v) = entry.get();
-                let Some(retval) = v.downcast_ref::<Interned<T>>() else {
-                    unreachable!();
-                };
-                retval
-            }
-        }
-        static GLOBAL_CACHE: RwLock<Map> = RwLock::new(Map::EMPTY);
-        #[cold]
-        fn insert_in_thread_local_cache<T: ?Sized + Send + Sync + 'static>(
-            cache: &RefCell<Map>,
-            this: LazyInternedLazy<T>,
-            hash: u64,
-        ) -> Interned<T> {
-            let read_lock = GLOBAL_CACHE.read().unwrap();
-            let v = read_lock.get(this, hash);
-            drop(read_lock);
-            let v = v.unwrap_or_else(|| {
-                let v = Box::leak(Box::new((this.0.value)()));
-                GLOBAL_CACHE.write().unwrap().get_or_insert(this, hash, v)
-            });
-            *cache.borrow_mut().get_or_insert(this, hash, v)
-        }
-        thread_local! {
-            static THREAD_LOCAL_CACHE: RefCell<Map> = const { RefCell::new(Map::EMPTY) };
-        }
-        let hash = type_map::TypeIdBuildHasher.hash_one(self.0.type_id);
-        THREAD_LOCAL_CACHE.with(|cache| {
-            let borrow = cache.borrow();
-            if let Some(v) = borrow.get(self, hash) {
-                *v
-            } else {
-                drop(borrow);
-                insert_in_thread_local_cache(cache, self, hash)
-            }
-        })
-    }
-}
-
-impl<T: ?Sized + Send + Sync + 'static> Copy for LazyInternedLazy<T> {}
-
-impl<T: ?Sized + Send + Sync + 'static> Clone for LazyInternedLazy<T> {
     fn clone(&self) -> Self {
         *self
     }
 }
 
-impl<T: ?Sized + Send + Sync + 'static> Hash for LazyInternedLazy<T> {
+impl<T: ?Sized + Send + Sync + 'static> Hash for LazyInternedFn<T> {
     fn hash<H: Hasher>(&self, state: &mut H) {
-        self.0.hash(state);
+        self.0.get_ptr_eq_with_type_id().hash(state);
     }
 }
 
-impl<T: ?Sized + Send + Sync + 'static> Eq for LazyInternedLazy<T> {}
+impl<T: ?Sized + Send + Sync + 'static> Eq for LazyInternedFn<T> {}
 
-impl<T: ?Sized + Send + Sync + 'static> PartialEq for LazyInternedLazy<T> {
+impl<T: ?Sized + Send + Sync + 'static> PartialEq for LazyInternedFn<T> {
     fn eq(&self, other: &Self) -> bool {
-        self.0 == other.0
+        self.0.get_ptr_eq_with_type_id() == other.0.get_ptr_eq_with_type_id()
     }
 }
 
 pub enum LazyInterned<T: ?Sized + Send + Sync + 'static> {
     Interned(Interned<T>),
-    Lazy(LazyInternedLazy<T>),
+    Lazy(LazyInternedFn<T>),
 }
 
 impl<T: ?Sized + Send + Sync + 'static> LazyInterned<T> {
-    pub const fn new_const<V: Default + Into<Interned<T>>>() -> Self {
+    pub const fn new_lazy(v: &'static dyn LazyInternedTrait<T>) -> Self {
-        Self::Lazy(LazyInternedLazy::new_const::<V>())
+        Self::Lazy(LazyInternedFn(v))
-    }
-    pub const fn new_const_default() -> Self
-    where
-        Interned<T>: Default,
-    {
-        Self::new_const::<Interned<T>>()
-    }
-    pub fn interned(self) -> Interned<T> {
-        match self {
-            Self::Interned(retval) => retval,
-            Self::Lazy(retval) => retval.interned(),
-        }
     }
 }
 
@@ -200,7 +77,7 @@ impl<T: ?Sized + Sync + Send + 'static> Clone for LazyInterned<T> {
 
 impl<T: ?Sized + Sync + Send + 'static> Copy for LazyInterned<T> {}
 
-impl<T: ?Sized + Sync + Send + 'static> Deref for LazyInterned<T> {
+impl<T: ?Sized + Sync + Send + 'static + Intern> Deref for LazyInterned<T> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
@@ -208,9 +85,9 @@ impl<T: ?Sized + Sync + Send + 'static> Deref for LazyInterned<T> {
     }
 }
 
-impl<T: ?Sized + Sync + Send + 'static> Eq for LazyInterned<T> where Interned<T>: Eq {}
+impl<T: ?Sized + Sync + Send + 'static + Intern> Eq for LazyInterned<T> where Interned<T>: Eq {}
 
-impl<T: ?Sized + Sync + Send + 'static> PartialEq for LazyInterned<T>
+impl<T: ?Sized + Sync + Send + 'static + Intern> PartialEq for LazyInterned<T>
 where
     Interned<T>: PartialEq,
 {
@@ -219,7 +96,7 @@ where
     }
 }
 
-impl<T: ?Sized + Sync + Send + 'static> Ord for LazyInterned<T>
+impl<T: ?Sized + Sync + Send + 'static + Intern> Ord for LazyInterned<T>
 where
     Interned<T>: Ord,
 {
@@ -228,7 +105,7 @@ where
     }
 }
 
-impl<T: ?Sized + Sync + Send + 'static> PartialOrd for LazyInterned<T>
+impl<T: ?Sized + Sync + Send + 'static + Intern> PartialOrd for LazyInterned<T>
 where
     Interned<T>: PartialOrd,
 {
@@ -237,7 +114,7 @@ where
     }
 }
 
-impl<T: ?Sized + Sync + Send + 'static> Hash for LazyInterned<T>
+impl<T: ?Sized + Sync + Send + 'static + Intern> Hash for LazyInterned<T>
 where
     Interned<T>: Hash,
 {
@@ -246,6 +123,77 @@ where
     }
 }
 
+impl<T: ?Sized + Sync + Send + 'static> LazyInterned<T> {
+    pub fn interned(self) -> Interned<T>
+    where
+        T: Intern,
+    {
+        struct MemoizeInterned<T: ?Sized + Intern>(PhantomData<T>);
+
+        impl<T: ?Sized + Intern> Hash for MemoizeInterned<T> {
+            fn hash<H: Hasher>(&self, _state: &mut H) {}
+        }
+
+        impl<T: ?Sized + Intern> PartialEq for MemoizeInterned<T> {
+            fn eq(&self, _other: &Self) -> bool {
+                true
+            }
+        }
+
+        impl<T: ?Sized + Intern> Eq for MemoizeInterned<T> {}
+
+        impl<T: ?Sized + Intern> Clone for MemoizeInterned<T> {
+            fn clone(&self) -> Self {
+                *self
+            }
+        }
+
+        impl<T: ?Sized + Intern> Copy for MemoizeInterned<T> {}
+
+        impl<T: ?Sized + Intern> MemoizeGeneric for MemoizeInterned<T> {
+            type InputRef<'a> = LazyInternedFn<T>;
+
+            type InputOwned = LazyInternedFn<T>;
+
+            type InputCow<'a> = LazyInternedFn<T>;
+
+            type Output = Interned<T>;
+
+            fn input_eq(a: Self::InputRef<'_>, b: Self::InputRef<'_>) -> bool {
+                a == b
+            }
+
+            fn input_borrow(input: &Self::InputOwned) -> Self::InputRef<'_> {
+                *input
+            }
+
+            fn input_cow_into_owned(input: Self::InputCow<'_>) -> Self::InputOwned {
+                input
+            }
+
+            fn input_cow_borrow<'a>(input: &'a Self::InputCow<'_>) -> Self::InputRef<'a> {
+                *input
+            }
+
+            fn input_cow_from_owned<'a>(input: Self::InputOwned) -> Self::InputCow<'a> {
+                input
+            }
+
+            fn input_cow_from_ref(input: Self::InputRef<'_>) -> Self::InputCow<'_> {
+                input
+            }
+
+            fn inner(self, input: Self::InputRef<'_>) -> Self::Output {
+                input.0.get()
+            }
+        }
+        match self {
+            Self::Interned(retval) => retval,
+            Self::Lazy(retval) => MemoizeInterned(PhantomData).get(retval),
+        }
+    }
+}
+
 pub trait InternedCompare {
     type InternedCompareKey: Ord + Hash;
     fn interned_compare_key_ref(this: &Self) -> Self::InternedCompareKey;
@@ -645,6 +593,71 @@ impl<T: ?Sized + 'static + Send + Sync + ToOwned> From<Interned<T>> for Cow<'_,
     }
 }
 
+struct InternerState<T: ?Sized + 'static + Send + Sync> {
+    table: HashTable<&'static T>,
+    hasher: DefaultBuildHasher,
+}
+
+pub struct Interner<T: ?Sized + 'static + Send + Sync> {
+    state: Mutex<InternerState<T>>,
+}
+
+impl<T: ?Sized + 'static + Send + Sync> Interner<T> {
+    fn get() -> &'static Interner<T> {
+        static TYPE_ID_MAP: TypeIdMap = TypeIdMap::new();
+        TYPE_ID_MAP.get_or_insert_default()
+    }
+}
+
+impl<T: ?Sized + 'static + Send + Sync> Default for Interner<T> {
+    fn default() -> Self {
+        Self {
+            state: Mutex::new(InternerState {
+                table: HashTable::new(),
+                hasher: Default::default(),
+            }),
+        }
+    }
+}
+
+impl<T: ?Sized + 'static + Send + Sync + Hash + Eq + ToOwned> Interner<T> {
+    fn intern<F: FnOnce(Cow<'_, T>) -> &'static T>(
+        &self,
+        alloc: F,
+        value: Cow<'_, T>,
+    ) -> Interned<T> {
+        let mut state = self.state.lock().unwrap();
+        let InternerState { table, hasher } = &mut *state;
+        let inner = *table
+            .entry(
+                hasher.hash_one(&*value),
+                |k| **k == *value,
+                |k| hasher.hash_one(&**k),
+            )
+            .or_insert_with(|| alloc(value))
+            .get();
+        Interned { inner }
+    }
+}
+
+impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<T> {
+    fn intern_sized(&self, value: Cow<'_, T>) -> Interned<T> {
+        self.intern(|value| Box::leak(Box::new(value.into_owned())), value)
+    }
+}
+
+impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<[T]> {
+    fn intern_slice(&self, value: Cow<'_, [T]>) -> Interned<[T]> {
+        self.intern(|value| value.into_owned().leak(), value)
+    }
+}
+
+impl Interner<BitSlice> {
+    fn intern_bit_slice(&self, value: Cow<'_, BitSlice>) -> Interned<BitSlice> {
+        self.intern(|value| value.into_owned().leak(), value)
+    }
+}
+
 pub struct Interned<T: ?Sized + 'static + Send + Sync> {
     inner: &'static T,
 }
@@ -964,7 +977,7 @@ impl<T: Clone + Send + Sync + 'static + Hash + Eq> Intern for T {
     where
         Self: ToOwned,
     {
-        interner::Interner::get().intern_sized(this)
+        Interner::get().intern_sized(this)
     }
 }
 
@@ -984,7 +997,7 @@ impl<T: Clone + Send + Sync + 'static + Hash + Eq> Intern for [T] {
     where
         Self: ToOwned,
     {
-        interner::Interner::get().intern_slice(this)
+        Interner::get().intern_slice(this)
     }
 }
 
@@ -1004,7 +1017,7 @@ impl Intern for BitSlice {
     where
         Self: ToOwned,
     {
-        interner::Interner::get().intern_bit_slice(this)
+        Interner::get().intern_bit_slice(this)
     }
 }
 
@@ -1022,17 +1035,10 @@ pub trait MemoizeGeneric: 'static + Send + Sync + Hash + Eq + Copy {
     fn inner(self, input: Self::InputRef<'_>) -> Self::Output;
     fn get_cow(self, input: Self::InputCow<'_>) -> Self::Output {
         static TYPE_ID_MAP: TypeIdMap = TypeIdMap::new();
-        thread_local! {
-            static TYPE_ID_MAP_CACHE: TypeIdMap = const { TypeIdMap::new() };
-        }
         let map: &RwLock<(
             DefaultBuildHasher,
             HashTable<(Self, Self::InputOwned, Self::Output)>,
-        )> = TYPE_ID_MAP_CACHE.with(|cache| {
+        )> = TYPE_ID_MAP.get_or_insert_default();
-            cache.get_or_insert_with(|| {
-                TYPE_ID_MAP.get_or_insert_with(|| Box::leak(Default::default()))
-            })
-        });
         fn hash_eq_key<'a, 'b, T: MemoizeGeneric>(
             this: &'a T,
             input: T::InputRef<'b>,
@@ -1134,35 +1140,3 @@ pub trait Memoize: 'static + Send + Sync + Hash + Eq + Copy {
         self.get_cow(Cow::Borrowed(input))
     }
 }
-
-/// like `once_cell::race::OnceBox` but for `Interned<T>` instead of `Box<T>`
-pub struct OnceInterned<T: 'static + Send + Sync>(OnceRef<'static, T>);
-
-impl<T: 'static + Send + Sync + fmt::Debug> fmt::Debug for OnceInterned<T> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_tuple("OnceInterned").field(&self.get()).finish()
-    }
-}
-
-impl<T: 'static + Send + Sync> Default for OnceInterned<T> {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl<T: 'static + Send + Sync> OnceInterned<T> {
-    pub const fn new() -> Self {
-        Self(OnceRef::new())
-    }
-    pub fn set(&self, v: Interned<T>) -> Result<(), ()> {
-        self.0.set(v.inner)
-    }
-    pub fn get(&self) -> Option<Interned<T>> {
-        self.0.get().map(|inner| Interned { inner })
-    }
-    pub fn get_or_init<F: FnOnce() -> Interned<T>>(&self, f: F) -> Interned<T> {
-        Interned {
-            inner: self.0.get_or_init(|| f().inner),
-        }
-    }
-}

crates/fayalite/src/intern/interner.rs

@@ -1,117 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-
-use crate::{
-    intern::{Interned, type_map::TypeIdMap},
-    util::DefaultBuildHasher,
-};
-use bitvec::slice::BitSlice;
-use hashbrown::HashTable;
-use std::{
-    borrow::Cow,
-    hash::{BuildHasher, Hash},
-    sync::RwLock,
-};
-
-struct InternerShard<T: ?Sized + 'static + Send + Sync> {
-    table: HashTable<&'static T>,
-}
-
-const LOG2_SHARD_COUNT: u32 = 6;
-
-fn shard_index_from_hash(hash: u64) -> usize {
-    // number of bits used for hashbrown's Tag
-    const HASH_BROWN_TAG_BITS: u32 = 7;
-    // try to extract bits of the hash that hashbrown isn't using,
-    // while accounting for some hash functions only returning `usize` bits.
-    const SHARD_INDEX_START: u32 = usize::BITS
-        .saturating_sub(HASH_BROWN_TAG_BITS)
-        .saturating_sub(LOG2_SHARD_COUNT);
-    let mut shard_index = hash >> SHARD_INDEX_START;
-    shard_index %= 1 << LOG2_SHARD_COUNT;
-    shard_index as usize
-}
-
-pub(crate) struct Interner<T: ?Sized + 'static + Send + Sync> {
-    shards: [RwLock<InternerShard<T>>; 1 << LOG2_SHARD_COUNT],
-    hasher: DefaultBuildHasher,
-}
-
-impl<T: ?Sized + 'static + Send + Sync> Interner<T> {
-    pub(crate) fn get() -> &'static Interner<T> {
-        static TYPE_ID_MAP: TypeIdMap = TypeIdMap::new();
-        thread_local! {
-            static TYPE_ID_MAP_CACHE: TypeIdMap = const { TypeIdMap::new() };
-        }
-        TYPE_ID_MAP_CACHE.with(|cache| {
-            cache.get_or_insert_with(|| {
-                TYPE_ID_MAP.get_or_insert_with(|| Box::leak(Default::default()))
-            })
-        })
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync> Default for Interner<T> {
-    fn default() -> Self {
-        Self {
-            shards: [const {
-                RwLock::new(InternerShard {
-                    table: HashTable::new(),
-                })
-            }; _],
-            hasher: Default::default(),
-        }
-    }
-}
-
-impl<T: ?Sized + 'static + Send + Sync + Hash + Eq + ToOwned> Interner<T> {
-    fn intern<F: FnOnce(Cow<'_, T>) -> &'static T>(
-        &self,
-        alloc: F,
-        value: Cow<'_, T>,
-    ) -> Interned<T> {
-        let hash = self.hasher.hash_one(&*value);
-        let shard_index = shard_index_from_hash(hash);
-        let shard = &self.shards[shard_index];
-        let shard_read = shard.read().unwrap();
-        let Some(&inner) = shard_read.table.find(hash, |k| **k == *value) else {
-            drop(shard_read);
-            return self.intern_cold(alloc, value, hash, shard);
-        };
-        Interned { inner }
-    }
-    #[cold]
-    fn intern_cold<F: FnOnce(Cow<'_, T>) -> &'static T>(
-        &self,
-        alloc: F,
-        value: Cow<'_, T>,
-        hash: u64,
-        shard: &RwLock<InternerShard<T>>,
-    ) -> Interned<T> {
-        let mut shard = shard.write().unwrap();
-        let inner = *shard
-            .table
-            .entry(hash, |k| **k == *value, |k| self.hasher.hash_one(&**k))
-            .or_insert_with(|| alloc(value))
-            .get();
-        Interned { inner }
-    }
-}
-
-impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<T> {
-    pub(crate) fn intern_sized(&self, value: Cow<'_, T>) -> Interned<T> {
-        self.intern(|value| Box::leak(Box::new(value.into_owned())), value)
-    }
-}
-
-impl<T: Clone + 'static + Send + Sync + Hash + Eq> Interner<[T]> {
-    pub(crate) fn intern_slice(&self, value: Cow<'_, [T]>) -> Interned<[T]> {
-        self.intern(|value| value.into_owned().leak(), value)
-    }
-}
-
-impl Interner<BitSlice> {
-    pub(crate) fn intern_bit_slice(&self, value: Cow<'_, BitSlice>) -> Interned<BitSlice> {
-        self.intern(|value| value.into_owned().leak(), value)
-    }
-}

crates/fayalite/src/intern/type_map.rs

@@ -6,7 +6,7 @@ use std::{
     sync::RwLock,
 };
 
-pub(crate) struct TypeIdHasher(u64);
+struct TypeIdHasher(u64);
 
 // assumes TypeId has at least 64 bits that is a good hash
 impl Hasher for TypeIdHasher {
@@ -63,7 +63,7 @@ impl Hasher for TypeIdHasher {
     }
 }
 
-pub(crate) struct TypeIdBuildHasher;
+struct TypeIdBuildHasher;
 
 impl BuildHasher for TypeIdBuildHasher {
     type Hasher = TypeIdHasher;
@@ -87,23 +87,20 @@ impl TypeIdMap {
     fn insert_slow(
         &self,
         type_id: TypeId,
-        make: impl FnOnce() -> &'static (dyn Any + Sync + Send),
+        make: fn() -> Box<dyn Any + Sync + Send>,
     ) -> &'static (dyn Any + Sync + Send) {
-        let value = make();
+        let value = Box::leak(make());
         let mut write_guard = self.0.write().unwrap();
         *write_guard.entry(type_id).or_insert(value)
     }
-    pub(crate) fn get_or_insert_with<T: Sized + Any + Send + Sync>(
+    pub(crate) fn get_or_insert_default<T: Sized + Any + Send + Sync + Default>(&self) -> &T {
-        &self,
-        make: impl FnOnce() -> &'static T,
-    ) -> &'static T {
         let type_id = TypeId::of::<T>();
         let read_guard = self.0.read().unwrap();
         let retval = read_guard.get(&type_id).map(|v| *v);
         drop(read_guard);
         let retval = match retval {
             Some(retval) => retval,
-            None => self.insert_slow(type_id, move || make()),
+            None => self.insert_slow(type_id, move || Box::new(T::default())),
         };
         retval.downcast_ref().expect("known to have correct TypeId")
     }

crates/fayalite/src/module.rs

@@ -2396,16 +2396,13 @@ impl ModuleBuilder {
     #[track_caller]
     pub fn extern_module_simulation_fn<
         Args: fmt::Debug + Clone + Hash + Eq + Send + Sync + 'static,
-        F: Copy + Fn(Args, crate::sim::ExternModuleSimulationState) -> Fut + Send + Sync + 'static,
         Fut: IntoFuture<Output = ()> + 'static,
     >(
         &self,
         args: Args,
-        f: F,
+        f: fn(Args, crate::sim::ExternModuleSimulationState) -> Fut,
     ) {
-        // use for compile-time side-effect
+        self.extern_module_simulation(crate::sim::SimGeneratorFn { args, f });
-        let _ = crate::sim::SimGeneratorFn::<Args, F, Fut>::ASSERT_F_IS_ZERO_SIZED;
-        self.extern_module_simulation(crate::sim::SimGeneratorFn::new(args, f));
     }
 }
 

crates/fayalite/src/phantom_const.rs

@@ -4,12 +4,12 @@
 use crate::{
     expr::{Expr, HdlPartialEqImpl, HdlPartialOrdImpl, ToExpr, ValueType},
     int::Bool,
-    intern::{Intern, Interned, InternedCompare, LazyInterned, Memoize},
+    intern::{Intern, Interned, InternedCompare, LazyInterned, LazyInternedTrait, Memoize},
     sim::value::{SimValue, ToSimValue, ToSimValueWithType},
     source_location::SourceLocation,
     ty::{
         CanonicalType, OpaqueSimValueSlice, OpaqueSimValueWriter, OpaqueSimValueWritten,
-        SimValueDebug, StaticType, Type, TypeProperties, impl_match_variant_as_self,
+        StaticType, Type, TypeProperties, impl_match_variant_as_self,
         serde_impls::{SerdeCanonicalType, SerdePhantomConst},
     },
 };
@@ -240,17 +240,11 @@ impl<T: ?Sized + PhantomConstValue> PhantomConst<T> {
     {
         Self::new_interned(value.intern_deref())
     }
-    pub const fn new_const<V: Default + Into<Interned<T>>>() -> Self {
+    pub const fn new_lazy(v: &'static dyn LazyInternedTrait<T>) -> Self {
         Self {
-            value: LazyInterned::new_const::<V>(),
+            value: LazyInterned::new_lazy(v),
         }
     }
-    pub const fn new_const_default() -> Self
-    where
-        Interned<T>: Default,
-    {
-        Self::new_const::<Interned<T>>()
-    }
     pub fn get(self) -> Interned<T> {
         self.value.interned()
     }
@@ -327,15 +321,6 @@ impl<T: ?Sized + PhantomConstValue> Type for PhantomConst<T> {
     }
 }
 
-impl<T: ?Sized + PhantomConstValue> SimValueDebug for PhantomConst<T> {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl<T: ?Sized + PhantomConstValue> Default for PhantomConst<T>
 where
     Interned<T>: Default,
@@ -349,7 +334,9 @@ impl<T: ?Sized + PhantomConstValue> StaticType for PhantomConst<T>
 where
     Interned<T>: Default,
 {
-    const TYPE: Self = Self::new_const_default();
+    const TYPE: Self = PhantomConst {
+        value: LazyInterned::new_lazy(&Interned::<T>::default),
+    };
     const MASK_TYPE: Self::MaskType = ();
     const TYPE_PROPERTIES: TypeProperties = <()>::TYPE_PROPERTIES;
     const MASK_TYPE_PROPERTIES: TypeProperties = <()>::TYPE_PROPERTIES;

crates/fayalite/src/reset.rs

@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
-
 use crate::{
     clock::Clock,
     expr::{CastToImpl, Expr, ValueType},
@@ -9,13 +8,11 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, OpaqueSimValueSize, OpaqueSimValueSlice, OpaqueSimValueWriter,
-        OpaqueSimValueWritten, SimValueDebug, StaticType, Type, TypeProperties,
+        OpaqueSimValueWritten, StaticType, Type, TypeProperties, impl_match_variant_as_self,
-        impl_match_variant_as_self,
     },
     util::ConstUsize,
 };
 use bitvec::{bits, order::Lsb0};
-use std::fmt;
 
 mod sealed {
     pub trait ResetTypeSealed {}
@@ -103,15 +100,6 @@ macro_rules! reset_type {
             }
         }
 
-        impl SimValueDebug for $name {
-            fn sim_value_debug(
-                value: &<Self as Type>::SimValue,
-                f: &mut fmt::Formatter<'_>,
-            ) -> fmt::Result {
-                fmt::Debug::fmt(value, f)
-            }
-        }
-
         impl $name {
             pub fn type_properties(self) -> TypeProperties {
                 Self::TYPE_PROPERTIES

crates/fayalite/src/sim.rs

@@ -40,7 +40,7 @@ use crate::{
         OpaqueSimValue, OpaqueSimValueSize, OpaqueSimValueSizeRange, OpaqueSimValueSlice,
         OpaqueSimValueWriter,
     },
-    util::{BitSliceWriteWithBase, DebugAsDisplay, HashMap, HashSet, copy_le_bytes_to_bitslice},
+    util::{BitSliceWriteWithBase, DebugAsDisplay, HashMap, HashSet},
 };
 use bitvec::{bits, order::Lsb0, slice::BitSlice, vec::BitVec, view::BitView};
 use num_bigint::BigInt;
@@ -54,6 +54,7 @@ use std::{
     hash::Hash,
     mem,
     pin::{Pin, pin},
+    ptr,
     rc::Rc,
     sync::{Arc, Mutex, MutexGuard},
     task::Poll,
@@ -828,7 +829,6 @@ where
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
 pub(crate) struct SimTrace<K, S> {
     kind: K,
-    maybe_changed: bool,
     state: S,
     last_state: S,
 }
@@ -849,14 +849,12 @@ impl<K: fmt::Debug> SimTraceDebug<TraceScalarId> for SimTrace<K, ()> {
     fn fmt(&self, id: TraceScalarId, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let Self {
             kind,
-            maybe_changed,
             state,
             last_state,
         } = self;
         f.debug_struct("SimTrace")
             .field("id", &id)
             .field("kind", kind)
-            .field("maybe_changed", maybe_changed)
             .field("state", state)
             .field("last_state", last_state)
             .finish()
@@ -867,14 +865,12 @@ impl<K: fmt::Debug> SimTraceDebug<TraceScalarId> for SimTrace<K, SimTraceState>
     fn fmt(&self, id: TraceScalarId, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let Self {
             kind,
-            maybe_changed,
             state,
             last_state,
         } = self;
         f.debug_struct("SimTrace")
             .field("id", &id)
             .field("kind", kind)
-            .field("maybe_changed", maybe_changed)
             .field("state", state)
             .field("last_state", last_state)
             .finish()
@@ -1300,16 +1296,10 @@ impl SimulationModuleState {
                 if !self.uninitialized_ios.is_empty() {
                     match which_module {
                         WhichModule::Main => {
-                            panic!(
+                            panic!("can't read from an output before initializing all inputs");
-                                "can't read from an output before initializing all inputs\nuninitialized_ios={:#?}",
-                                SortedSetDebug(&self.uninitialized_ios),
-                            );
                         }
                         WhichModule::Extern { .. } => {
-                            panic!(
+                            panic!("can't read from an input before initializing all outputs");
-                                "can't read from an input before initializing all outputs\nuninitialized_ios={:#?}",
-                                SortedSetDebug(&self.uninitialized_ios),
-                            );
                         }
                     }
                 }
@@ -2083,12 +2073,10 @@ impl SimulationImpl {
             traces: SimTraces(Box::from_iter(compiled.traces.0.iter().map(
                 |&SimTrace {
                      kind,
-                     maybe_changed: _,
                      state: _,
                      last_state: _,
                  }| SimTrace {
                     kind,
-                    maybe_changed: true,
                     state: kind.make_state(),
                     last_state: kind.make_state(),
                 },
@@ -2133,16 +2121,13 @@ impl SimulationImpl {
             id,
             &SimTrace {
                 kind,
-                maybe_changed,
                 ref state,
                 ref last_state,
             },
         ) in self.traces.0.iter().enumerate()
         {
-            if ONLY_IF_CHANGED {
+            if ONLY_IF_CHANGED && state == last_state {
-                if !(maybe_changed && state != last_state) {
+                continue;
-                    continue;
-                }
             }
             let id = TraceScalarId(id);
             match kind {
@@ -2203,45 +2188,10 @@ impl SimulationImpl {
     fn read_traces<const IS_INITIAL_STEP: bool>(&mut self) {
         for &mut SimTrace {
             kind,
-            ref mut maybe_changed,
             ref mut state,
             ref mut last_state,
         } in &mut self.traces.0
         {
-            let new_maybe_changed = match kind {
-                SimTraceKind::BigUInt { index, ty: _ }
-                | SimTraceKind::BigSInt { index, ty: _ }
-                | SimTraceKind::BigBool { index }
-                | SimTraceKind::BigAsyncReset { index }
-                | SimTraceKind::BigSyncReset { index }
-                | SimTraceKind::BigClock { index } => self
-                    .state
-                    .big_slots
-                    .state_index_fetch_and_clear_maybe_modified_flag(index),
-                SimTraceKind::SmallUInt { index, ty: _ }
-                | SimTraceKind::SmallSInt { index, ty: _ }
-                | SimTraceKind::SmallBool { index }
-                | SimTraceKind::SmallAsyncReset { index }
-                | SimTraceKind::SmallSyncReset { index }
-                | SimTraceKind::SmallClock { index }
-                | SimTraceKind::EnumDiscriminant { index, ty: _ } => self
-                    .state
-                    .small_slots
-                    .state_index_fetch_and_clear_maybe_modified_flag(index),
-                SimTraceKind::SimOnly { index, ty: _ } => self
-                    .state
-                    .sim_only_slots
-                    .state_index_fetch_and_clear_maybe_modified_flag(index),
-                SimTraceKind::PhantomConst { ty: _ } => IS_INITIAL_STEP,
-            };
-            if !new_maybe_changed && !IS_INITIAL_STEP {
-                if *maybe_changed {
-                    last_state.clone_from(state);
-                }
-                *maybe_changed = false;
-                continue;
-            }
-            *maybe_changed = new_maybe_changed;
             if !IS_INITIAL_STEP {
                 mem::swap(state, last_state);
             }
@@ -2249,11 +2199,14 @@ impl SimulationImpl {
                 SimTraceKind::BigUInt { index, ty: _ } | SimTraceKind::BigSInt { index, ty: _ } => {
                     let state = state.unwrap_bits_mut();
                     let bigint = &self.state.big_slots[index];
-                    copy_le_bytes_to_bitslice(
+                    let mut bytes = bigint.to_signed_bytes_le();
-                        state,
+                    bytes.resize(
-                        &bigint.to_signed_bytes_le(),
+                        state.len().div_ceil(8),
-                        bigint.is_negative(),
+                        if bigint.is_negative() { 0xFF } else { 0 },
                     );
+                    let bitslice = BitSlice::<u8, Lsb0>::from_slice(&bytes);
+                    let bitslice = &bitslice[..state.len()];
+                    state.clone_from_bitslice(bitslice);
                 }
                 SimTraceKind::BigBool { index }
                 | SimTraceKind::BigAsyncReset { index }
@@ -4112,48 +4065,13 @@ pub trait ExternModuleSimGenerator: Clone + Eq + Hash + Any + Send + Sync + fmt:
     fn run<'a>(&'a self, sim: ExternModuleSimulationState) -> impl IntoFuture<Output = ()> + 'a;
 }
 
-/// Type requirements: `F` must be zero-sized, this guarantees that the function called
+pub struct SimGeneratorFn<Args, Fut> {
-/// by `F` is entirely determined by the type `F` and not by its value, allowing us to
+    pub args: Args,
-/// correctly leave `F` out of the stuff used for `Hash` and `Eq`.
+    pub f: fn(Args, ExternModuleSimulationState) -> Fut,
-///
-/// Note we can't just use function pointers instead -- comparing them is non-deterministic
-/// since Rust will duplicate and/or merge functions, even if those functions happen to have
-/// different UB but just happen to compile to the same assembly language:
-/// <https://github.com/rust-lang/unsafe-code-guidelines/issues/589#issuecomment-3515424930>
-pub struct SimGeneratorFn<Args, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> {
-    args: Args,
-    f: F,
 }
 
-impl<Args, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut>
+impl<Args: fmt::Debug, Fut> fmt::Debug for SimGeneratorFn<Args, Fut> {
-    SimGeneratorFn<Args, F, Fut>
-{
-    pub const ASSERT_F_IS_ZERO_SIZED: () = {
-        if size_of::<F>() != 0 {
-            panic!(
-                "F must be zero-sized -- so it must be a closure with no captures or a function item, it can't be a function pointer"
-            );
-        }
-    };
-    pub const fn new(args: Args, f: F) -> Self {
-        // use for compile-time side-effect
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
-        Self { args, f }
-    }
-    pub const fn args(&self) -> &Args {
-        &self.args
-    }
-    pub const fn f(&self) -> F {
-        self.f
-    }
-}
-
-impl<Args: fmt::Debug, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> fmt::Debug
-    for SimGeneratorFn<Args, F, Fut>
-{
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        // use for compile-time side-effect
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
         let Self { args, f: _ } = self;
         f.debug_struct("SimGeneratorFn")
             .field("args", args)
@@ -4162,39 +4080,25 @@ impl<Args: fmt::Debug, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, F
     }
 }
 
-impl<Args: Hash, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> Hash
+impl<Args: Hash, Fut> Hash for SimGeneratorFn<Args, Fut> {
-    for SimGeneratorFn<Args, F, Fut>
-{
     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
-        // use for compile-time side-effect
+        let Self { args, f } = self;
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
-        let Self { args, f: _ } = self;
         args.hash(state);
+        f.hash(state);
     }
 }
 
-impl<Args: Eq, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> Eq
+impl<Args: Eq, Fut> Eq for SimGeneratorFn<Args, Fut> {}
-    for SimGeneratorFn<Args, F, Fut>
-{
-}
 
-impl<Args: PartialEq, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> PartialEq
+impl<Args: PartialEq, Fut> PartialEq for SimGeneratorFn<Args, Fut> {
-    for SimGeneratorFn<Args, F, Fut>
-{
     fn eq(&self, other: &Self) -> bool {
-        // use for compile-time side-effect
+        let Self { args, f } = self;
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
+        *args == other.args && ptr::fn_addr_eq(*f, other.f)
-        let Self { args, f: _ } = self;
-        *args == other.args
     }
 }
 
-impl<Args: Clone, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> Clone
+impl<Args: Clone, Fut> Clone for SimGeneratorFn<Args, Fut> {
-    for SimGeneratorFn<Args, F, Fut>
-{
     fn clone(&self) -> Self {
-        // use for compile-time side-effect
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
         Self {
             args: self.args.clone(),
             f: self.f,
@@ -4202,20 +4106,14 @@ impl<Args: Clone, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> C
     }
 }
 
-impl<Args: Copy, F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut, Fut> Copy
+impl<Args: Copy, Fut> Copy for SimGeneratorFn<Args, Fut> {}
-    for SimGeneratorFn<Args, F, Fut>
-{
-}
 
 impl<
-    Args: fmt::Debug + Clone + Eq + Hash + Send + Sync + 'static,
+    T: fmt::Debug + Clone + Eq + Hash + Send + Sync + 'static,
-    F: Copy + Fn(Args, ExternModuleSimulationState) -> Fut + Send + Sync + 'static,
     Fut: IntoFuture<Output = ()> + 'static,
-> ExternModuleSimGenerator for SimGeneratorFn<Args, F, Fut>
+> ExternModuleSimGenerator for SimGeneratorFn<T, Fut>
 {
     fn run<'a>(&'a self, sim: ExternModuleSimulationState) -> impl IntoFuture<Output = ()> + 'a {
-        // use for compile-time side-effect
-        let _ = Self::ASSERT_F_IS_ZERO_SIZED;
         (self.f)(self.args.clone(), sim)
     }
 }

crates/fayalite/src/sim/compiler.rs

@@ -2234,7 +2234,6 @@ impl Compiler {
         let id = TraceScalarId(self.traces.0.len());
         self.traces.0.push(SimTrace {
             kind,
-            maybe_changed: true,
             state: (),
             last_state: (),
         });
@@ -4088,15 +4087,6 @@ impl Compiler {
             let init = self.compiled_expr_to_value(init, reg.source_location());
             (reg.clock_domain().rst, init)
         });
-
-        // next value defaults to current value
-        self.compile_simple_connect(
-            [].intern_slice(),
-            value.into(),
-            value,
-            reg.source_location(),
-        );
-
         self.compile_reg(
             clk,
             reset_and_init,

crates/fayalite/src/sim/interpreter.rs

@@ -17,11 +17,12 @@ use bitvec::slice::BitSlice;
 use num_bigint::BigInt;
 use num_traits::{One, Signed, ToPrimitive, Zero};
 use std::{
+    borrow::BorrowMut,
     convert::Infallible,
     fmt::{self, Write},
     hash::Hash,
     marker::PhantomData,
-    ops::{ControlFlow, Deref, Index, IndexMut},
+    ops::{ControlFlow, Deref, DerefMut, Index, IndexMut},
 };
 use vec_map::VecMap;
 
@@ -914,12 +915,6 @@ impl<K: StatePartKind> StatePart<K> {
             value: K::borrow_state(&mut self.value),
         }
     }
-    pub(crate) fn state_index_fetch_and_clear_maybe_modified_flag(
-        &mut self,
-        part_index: StatePartIndex<K>,
-    ) -> bool {
-        K::state_index_fetch_and_clear_maybe_modified_flag(&mut self.value, part_index)
-    }
 }
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
@@ -927,38 +922,56 @@ pub(crate) struct BorrowedStatePart<'a, K: StatePartKind> {
     pub(crate) value: K::BorrowedState<'a>,
 }
 
-impl<K: StatePartKind> BorrowedStatePart<'_, K> {
+impl<
+    'a,
+    K: StatePartKind<
+        BorrowedState<'a>: DerefMut<Target: IndexMut<usize, Output = T> + BorrowMut<[T]>>,
+    >,
+    T,
+> BorrowedStatePart<'a, K>
+{
     pub(crate) fn get_disjoint_mut<const N: usize>(
         &mut self,
         indexes: [StatePartIndex<K>; N],
-    ) -> [&mut K::StateElement; N] {
+    ) -> [&mut T; N] {
-        K::borrowed_state_get_disjoint_mut(&mut self.value, indexes)
+        (*self.value)
+            .borrow_mut()
+            .get_disjoint_mut(indexes.map(|v| v.value as usize))
+            .expect("indexes are disjoint")
     }
 }
 
-impl<K: StatePartKind> Index<StatePartIndex<K>> for StatePart<K> {
+impl<K: StatePartKind<State: Deref<Target: Index<usize, Output = T>>>, T> Index<StatePartIndex<K>>
-    type Output = K::StateElement;
+    for StatePart<K>
+{
+    type Output = T;
     fn index(&self, index: StatePartIndex<K>) -> &Self::Output {
-        K::state_index(&self.value, index)
+        &self.value[index.value as usize]
     }
 }
 
-impl<K: StatePartKind> IndexMut<StatePartIndex<K>> for StatePart<K> {
+impl<K: StatePartKind<State: DerefMut<Target: IndexMut<usize, Output = T>>>, T>
+    IndexMut<StatePartIndex<K>> for StatePart<K>
+{
     fn index_mut(&mut self, index: StatePartIndex<K>) -> &mut Self::Output {
-        K::state_index_mut(&mut self.value, index)
+        &mut self.value[index.value as usize]
     }
 }
 
-impl<K: StatePartKind> Index<StatePartIndex<K>> for BorrowedStatePart<'_, K> {
+impl<'a, K: StatePartKind<BorrowedState<'a>: Deref<Target: Index<usize, Output = T>>>, T>
-    type Output = K::StateElement;
+    Index<StatePartIndex<K>> for BorrowedStatePart<'a, K>
+{
+    type Output = T;
     fn index(&self, index: StatePartIndex<K>) -> &Self::Output {
-        K::borrowed_state_index(&self.value, index)
+        &self.value[index.value as usize]
     }
 }
 
-impl<K: StatePartKind> IndexMut<StatePartIndex<K>> for BorrowedStatePart<'_, K> {
+impl<'a, K: StatePartKind<BorrowedState<'a>: DerefMut<Target: IndexMut<usize, Output = T>>>, T>
+    IndexMut<StatePartIndex<K>> for BorrowedStatePart<'a, K>
+{
     fn index_mut(&mut self, index: StatePartIndex<K>) -> &mut Self::Output {
-        K::borrowed_state_index_mut(&mut self.value, index)
+        &mut self.value[index.value as usize]
     }
 }
 

crates/fayalite/src/sim/interpreter/parts.rs

@@ -236,7 +236,6 @@ pub(crate) trait StatePartKind:
     type LayoutData: Send + Sync + Eq + Hash + fmt::Debug + 'static + Copy;
     type State: fmt::Debug + 'static + Clone;
     type BorrowedState<'a>: 'a;
-    type StateElement;
     fn new_state(layout_data: &[Self::LayoutData]) -> Self::State;
     fn borrow_state<'a>(state: &'a mut Self::State) -> Self::BorrowedState<'a>;
     fn part_debug_data<BK: InsnsBuildingKind>(
@@ -248,30 +247,6 @@ pub(crate) trait StatePartKind:
         index: StatePartIndex<Self>,
         f: &mut impl fmt::Write,
     ) -> fmt::Result;
-    fn state_index<'a>(
-        state: &'a Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement;
-    fn state_index_mut<'a>(
-        state: &'a mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement;
-    fn state_index_fetch_and_clear_maybe_modified_flag(
-        state: &mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> bool;
-    fn borrowed_state_index<'a, 'b>(
-        state: &'a Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement;
-    fn borrowed_state_index_mut<'a, 'b>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement;
-    fn borrowed_state_get_disjoint_mut<'a, 'b, const N: usize>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_indexes: [StatePartIndex<Self>; N],
-    ) -> [&'a mut Self::StateElement; N];
 }
 
 macro_rules! make_state_part_kinds {
@@ -297,7 +272,6 @@ impl StatePartKind for StatePartKindMemories {
     type LayoutData = MemoryData<Interned<BitSlice>>;
     type State = Box<[MemoryData<BitBox>]>;
     type BorrowedState<'a> = &'a mut [MemoryData<BitBox>];
-    type StateElement = MemoryData<BitBox>;
     fn new_state(layout_data: &[Self::LayoutData]) -> Self::State {
         layout_data
             .iter()
@@ -323,88 +297,19 @@ impl StatePartKind for StatePartKindMemories {
     ) -> fmt::Result {
         write!(f, "{:#?}", &state.memories[index])
     }
-    fn state_index<'a>(
-        state: &'a Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state[part_index.as_usize()]
-    }
-    fn state_index_mut<'a>(
-        state: &'a mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        &mut state[part_index.as_usize()]
-    }
-    fn state_index_fetch_and_clear_maybe_modified_flag(
-        _state: &mut Self::State,
-        _part_index: StatePartIndex<Self>,
-    ) -> bool {
-        true
-    }
-    fn borrowed_state_index<'a, 'b>(
-        state: &'a Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state[part_index.as_usize()]
-    }
-    fn borrowed_state_index_mut<'a, 'b>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        &mut state[part_index.as_usize()]
-    }
-    fn borrowed_state_get_disjoint_mut<'a, 'b, const N: usize>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_indexes: [StatePartIndex<Self>; N],
-    ) -> [&'a mut Self::StateElement; N] {
-        state
-            .get_disjoint_mut(part_indexes.map(StatePartIndex::as_usize))
-            .expect("indexes are disjoint")
-    }
-}
-
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Default)]
-pub(crate) struct StateAndModified<T, M> {
-    pub(crate) state: T,
-    pub(crate) modified: M,
-}
-
-impl<T: Deref<Target = [E]>, M: Deref<Target = [bool]>, E: fmt::Debug> fmt::Debug
-    for StateAndModified<T, M>
-{
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_list()
-            .entries(self.state.iter().zip(self.modified.iter().copied()).map(
-                |(state, modified)| {
-                    fmt::from_fn(move |f| {
-                        state.fmt(f)?;
-                        if modified {
-                            f.write_str(" (modified)")?;
-                        }
-                        Ok(())
-                    })
-                },
-            ))
-            .finish()
-    }
 }
 
 impl StatePartKind for StatePartKindSmallSlots {
     const NAME: &'static str = "SmallSlots";
     type DebugData = SlotDebugData;
     type LayoutData = ();
-    type State = StateAndModified<Box<[Self::StateElement]>, Box<[bool]>>;
+    type State = Box<[SmallUInt]>;
-    type BorrowedState<'a> = StateAndModified<&'a mut [Self::StateElement], &'a mut [bool]>;
+    type BorrowedState<'a> = &'a mut [SmallUInt];
-    type StateElement = SmallUInt;
     fn new_state(layout_data: &[Self::LayoutData]) -> Self::State {
-        StateAndModified {
+        vec![0; layout_data.len()].into_boxed_slice()
-            state: vec![0; layout_data.len()].into_boxed_slice(),
-            modified: vec![false; layout_data.len()].into_boxed_slice(),
-        }
     }
     fn borrow_state<'a>(state: &'a mut Self::State) -> Self::BorrowedState<'a> {
-        let StateAndModified { state, modified } = state;
+        state
-        StateAndModified { state, modified }
     }
     fn part_debug_data<BK: InsnsBuildingKind>(
         state_layout: &StateLayout<BK>,
@@ -425,69 +330,19 @@ impl StatePartKind for StatePartKindSmallSlots {
         write!(f, "{value:#x} {}", value as SmallSInt)?;
         Ok(())
     }
-    fn state_index<'a>(
-        state: &'a Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn state_index_mut<'a>(
-        state: &'a mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn state_index_fetch_and_clear_maybe_modified_flag(
-        state: &mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> bool {
-        std::mem::replace(&mut state.modified[part_index.as_usize()], false)
-    }
-    fn borrowed_state_index<'a, 'b>(
-        state: &'a Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_index_mut<'a, 'b>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_get_disjoint_mut<'a, 'b, const N: usize>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_indexes: [StatePartIndex<Self>; N],
-    ) -> [&'a mut Self::StateElement; N] {
-        for part_index in part_indexes {
-            state.modified[part_index.as_usize()] = true;
-        }
-        state
-            .state
-            .get_disjoint_mut(part_indexes.map(StatePartIndex::as_usize))
-            .expect("indexes are disjoint")
-    }
 }
 
 impl StatePartKind for StatePartKindBigSlots {
     const NAME: &'static str = "BigSlots";
     type DebugData = SlotDebugData;
     type LayoutData = ();
-    type State = StateAndModified<Box<[Self::StateElement]>, Box<[bool]>>;
+    type State = Box<[BigInt]>;
-    type BorrowedState<'a> = StateAndModified<&'a mut [Self::StateElement], &'a mut [bool]>;
+    type BorrowedState<'a> = &'a mut [BigInt];
-    type StateElement = BigInt;
     fn new_state(layout_data: &[Self::LayoutData]) -> Self::State {
-        let state: Box<[_]> = layout_data.iter().map(|_| BigInt::default()).collect();
+        layout_data.iter().map(|_| BigInt::default()).collect()
-        StateAndModified {
-            modified: vec![false; state.len()].into_boxed_slice(),
-            state,
-        }
     }
     fn borrow_state<'a>(state: &'a mut Self::State) -> Self::BorrowedState<'a> {
-        let StateAndModified { state, modified } = state;
+        state
-        StateAndModified { state, modified }
     }
     fn part_debug_data<BK: InsnsBuildingKind>(
         state_layout: &StateLayout<BK>,
@@ -506,69 +361,19 @@ impl StatePartKind for StatePartKindBigSlots {
     ) -> fmt::Result {
         write!(f, "{:#x}", state.big_slots[index])
     }
-    fn state_index<'a>(
-        state: &'a Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn state_index_mut<'a>(
-        state: &'a mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn state_index_fetch_and_clear_maybe_modified_flag(
-        state: &mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> bool {
-        std::mem::replace(&mut state.modified[part_index.as_usize()], false)
-    }
-    fn borrowed_state_index<'a, 'b>(
-        state: &'a Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_index_mut<'a, 'b>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_get_disjoint_mut<'a, 'b, const N: usize>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_indexes: [StatePartIndex<Self>; N],
-    ) -> [&'a mut Self::StateElement; N] {
-        for part_index in part_indexes {
-            state.modified[part_index.as_usize()] = true;
-        }
-        state
-            .state
-            .get_disjoint_mut(part_indexes.map(StatePartIndex::as_usize))
-            .expect("indexes are disjoint")
-    }
 }
 
 impl StatePartKind for StatePartKindSimOnlySlots {
     const NAME: &'static str = "SimOnlySlots";
     type DebugData = SlotDebugData;
     type LayoutData = DynSimOnly;
-    type State = StateAndModified<Box<[Self::StateElement]>, Box<[bool]>>;
+    type State = Box<[DynSimOnlyValue]>;
-    type BorrowedState<'a> = StateAndModified<&'a mut [Self::StateElement], &'a mut [bool]>;
+    type BorrowedState<'a> = &'a mut [DynSimOnlyValue];
-    type StateElement = DynSimOnlyValue;
     fn new_state(layout_data: &[Self::LayoutData]) -> Self::State {
-        let state: Box<[_]> = layout_data.iter().map(|ty| ty.default_value()).collect();
+        layout_data.iter().map(|ty| ty.default_value()).collect()
-        StateAndModified {
-            modified: vec![false; state.len()].into_boxed_slice(),
-            state,
-        }
     }
     fn borrow_state<'a>(state: &'a mut Self::State) -> Self::BorrowedState<'a> {
-        let StateAndModified { state, modified } = state;
+        state
-        StateAndModified { state, modified }
     }
     fn part_debug_data<BK: InsnsBuildingKind>(
         state_layout: &StateLayout<BK>,
@@ -587,50 +392,6 @@ impl StatePartKind for StatePartKindSimOnlySlots {
     ) -> fmt::Result {
         write!(f, "{:?}", state.sim_only_slots[index])
     }
-    fn state_index<'a>(
-        state: &'a Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn state_index_mut<'a>(
-        state: &'a mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn state_index_fetch_and_clear_maybe_modified_flag(
-        state: &mut Self::State,
-        part_index: StatePartIndex<Self>,
-    ) -> bool {
-        std::mem::replace(&mut state.modified[part_index.as_usize()], false)
-    }
-    fn borrowed_state_index<'a, 'b>(
-        state: &'a Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a Self::StateElement {
-        &state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_index_mut<'a, 'b>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_index: StatePartIndex<Self>,
-    ) -> &'a mut Self::StateElement {
-        state.modified[part_index.as_usize()] = true;
-        &mut state.state[part_index.as_usize()]
-    }
-    fn borrowed_state_get_disjoint_mut<'a, 'b, const N: usize>(
-        state: &'a mut Self::BorrowedState<'b>,
-        part_indexes: [StatePartIndex<Self>; N],
-    ) -> [&'a mut Self::StateElement; N] {
-        for part_index in part_indexes {
-            state.modified[part_index.as_usize()] = true;
-        }
-        state
-            .state
-            .get_disjoint_mut(part_indexes.map(StatePartIndex::as_usize))
-            .expect("indexes are disjoint")
-    }
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

crates/fayalite/src/sim/value.rs

@@ -15,8 +15,7 @@ use crate::{
     source_location::SourceLocation,
     ty::{
         CanonicalType, OpaqueSimValue, OpaqueSimValueSize, OpaqueSimValueSlice,
-        OpaqueSimValueWriter, SimValueDebug, StaticType, Type, TypeProperties,
+        OpaqueSimValueWriter, StaticType, Type, TypeProperties, impl_match_variant_as_self,
-        impl_match_variant_as_self,
     },
     util::{
         ConstUsize, HashMap,
@@ -1395,15 +1394,6 @@ impl Type for DynSimOnly {
     }
 }
 
-impl SimValueDebug for DynSimOnly {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl<T: SimOnlyValueTrait> Type for SimOnly<T> {
     type BaseType = DynSimOnly;
     type MaskType = Bool;
@@ -1469,15 +1459,6 @@ impl<T: SimOnlyValueTrait> Type for SimOnly<T> {
     }
 }
 
-impl<T: SimOnlyValueTrait> SimValueDebug for SimOnly<T> {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 impl<T: SimOnlyValueTrait> StaticType for SimOnly<T> {
     const TYPE: Self = Self::new();
 

crates/fayalite/src/sim/vcd.rs

@@ -21,31 +21,14 @@ use crate::{
 };
 use bitvec::{order::Lsb0, slice::BitSlice};
 use hashbrown::hash_map::Entry;
-use sha2::{Digest, Sha256};
 use std::{
-    collections::BTreeMap,
     fmt::{self, Write as _},
     io, mem,
-    num::NonZeroU64,
 };
 
-#[derive(Default, Clone)]
+#[derive(Default)]
-struct PathHash(Sha256);
-
-impl PathHash {
-    fn joined(mut self, segment: impl AsRef<[u8]>) -> Self {
-        let segment = segment.as_ref();
-        self.0.update(u32::to_le_bytes(
-            segment.len().try_into().expect("path segment is too big"),
-        ));
-        self.0.update(segment);
-        self
-    }
-}
-
 struct Scope {
     last_inserted: HashMap<Interned<str>, usize>,
-    path_hash: PathHash,
 }
 
 #[derive(Copy, Clone)]
@@ -78,13 +61,6 @@ impl fmt::Display for VerilogIdentifier {
 }
 
 impl Scope {
-    fn new(path_hash: PathHash) -> Self {
-        Self {
-            last_inserted: Default::default(),
-            path_hash,
-        }
-    }
-
     fn new_identifier(&mut self, unescaped_name: Interned<str>) -> VerilogIdentifier {
         let next_disambiguator = match self.last_inserted.entry(unescaped_name) {
             Entry::Vacant(entry) => {
@@ -187,26 +163,6 @@ impl<W: io::Write> fmt::Debug for VcdWriterDecls<W> {
     }
 }
 
-/// pass in scope to ensure it's not available in child scope
-fn try_write_vcd_scope<W: io::Write, R>(
-    writer: &mut W,
-    scope_type: &str,
-    scope_name: Interned<str>,
-    scope: Option<&mut Scope>,
-    f: impl FnOnce(&mut W, Option<&mut Scope>) -> io::Result<R>,
-) -> io::Result<R> {
-    let Some(scope) = scope else {
-        return f(writer, None);
-    };
-    write_vcd_scope(
-        writer,
-        scope_type,
-        scope_name,
-        scope,
-        move |writer, scope| f(writer, Some(scope)),
-    )
-}
-
 /// pass in scope to ensure it's not available in child scope
 fn write_vcd_scope<W: io::Write, R>(
     writer: &mut W,
@@ -215,10 +171,12 @@ fn write_vcd_scope<W: io::Write, R>(
     scope: &mut Scope,
     f: impl FnOnce(&mut W, &mut Scope) -> io::Result<R>,
 ) -> io::Result<R> {
-    let path_hash = scope.path_hash.clone().joined(scope_name);
+    writeln!(
-    let scope_name = scope.new_identifier(scope_name);
+        writer,
-    writeln!(writer, "$scope {scope_type} {scope_name} $end")?;
+        "$scope {scope_type} {} $end",
-    let retval = f(writer, &mut Scope::new(path_hash))?;
+        scope.new_identifier(scope_name),
+    )?;
+    let retval = f(writer, &mut Scope::default())?;
     writeln!(writer, "$upscope $end")?;
     Ok(retval)
 }
@@ -258,7 +216,6 @@ trait_arg! {
 struct ArgModule<'a> {
     properties: &'a mut VcdWriterProperties,
     scope: &'a mut Scope,
-    instance_name: Option<Interned<str>>,
 }
 
 impl<'a> ArgModule<'a> {
@@ -266,7 +223,6 @@ impl<'a> ArgModule<'a> {
         ArgModule {
             properties: self.properties,
             scope: self.scope,
-            instance_name: self.instance_name,
         }
     }
 }
@@ -290,7 +246,7 @@ struct ArgInType<'a> {
     sink_var_type: &'static str,
     duplex_var_type: &'static str,
     properties: &'a mut VcdWriterProperties,
-    scope: Option<&'a mut Scope>,
+    scope: &'a mut Scope,
 }
 
 impl<'a> ArgInType<'a> {
@@ -300,7 +256,7 @@ impl<'a> ArgInType<'a> {
             sink_var_type: self.sink_var_type,
             duplex_var_type: self.duplex_var_type,
             properties: self.properties,
-            scope: self.scope.as_deref_mut(),
+            scope: self.scope,
         }
     }
 }
@@ -335,78 +291,19 @@ impl WriteTrace for TraceScalar {
     }
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+fn write_vcd_id<W: io::Write>(writer: &mut W, mut id: usize) -> io::Result<()> {
-#[repr(transparent)]
+    let min_char = b'!';
-struct VcdId(NonZeroU64);
+    let max_char = b'~';
-
+    let base = (max_char - min_char + 1) as usize;
-impl VcdId {
+    loop {
-    const CHAR_RANGE: std::ops::RangeInclusive<u8> = b'!'..=b'~';
+        let digit = (id % base) as u8 + min_char;
-    const BASE: u8 = *Self::CHAR_RANGE.end() - *Self::CHAR_RANGE.start() + 1;
+        id /= base;
-    const LOW_HALF_CHARS: u32 = 5;
+        writer.write_all(&[digit])?;
-    const LOW_HALF_MODULUS: u64 = (Self::BASE as u64).pow(Self::LOW_HALF_CHARS);
+        if id == 0 {
-
+            break;
-    const fn from_str(s: &str) -> Option<Self> {
-        if s.is_empty() {
-            return None;
         }
-        let mut retval = 0u64;
-        let mut bytes = s.as_bytes();
-        while let [ref rest @ .., digit] = *bytes {
-            bytes = rest;
-            let Some(digit) = digit.checked_sub(*Self::CHAR_RANGE.start()) else {
-                return None;
-            };
-            if digit >= Self::BASE {
-                return None;
-            }
-            let Some(v) = retval.checked_mul(Self::BASE as _) else {
-                return None;
-            };
-            let Some(v) = v.checked_add(digit as _) else {
-                return None;
-            };
-            retval = v;
-        }
-        let Some(retval) = NonZeroU64::new(retval) else {
-            return None;
-        };
-        Some(Self(retval))
     }
-    #[must_use]
+    Ok(())
-    const fn write(self, out: &mut [u8]) -> usize {
-        let mut id = self.0.get();
-        let mut len = 0;
-        loop {
-            let digit = (id % Self::BASE as u64) as u8 + *Self::CHAR_RANGE.start();
-            id /= Self::BASE as u64;
-            if len < out.len() {
-                out[len] = digit;
-            }
-            len += 1;
-            if id == 0 {
-                break;
-            }
-        }
-        len
-    }
-    const MAX_ID_LEN: usize = Self(NonZeroU64::MAX).write(&mut []);
-}
-
-/// check that VcdId properly round-trips
-const _: () = {
-    let s = "RoundTrip";
-    let Some(id) = VcdId::from_str(s) else {
-        unreachable!();
-    };
-    let mut buf = [0u8; VcdId::MAX_ID_LEN];
-    let len = id.write(&mut buf);
-    assert!(crate::util::const_bytes_cmp(buf.split_at(len).0, s.as_bytes()).is_eq());
-};
-
-fn write_vcd_id<W: io::Write>(writer: &mut W, id: VcdId) -> io::Result<()> {
-    let mut buf = [0u8; VcdId::MAX_ID_LEN];
-    let len = id.write(&mut buf);
-    writer.write_all(&buf[..len])
 }
 
 struct Escaped<T: fmt::Display>(T);
@@ -449,13 +346,12 @@ impl<T: fmt::Display> fmt::Display for Escaped<T> {
 
 fn write_vcd_var<W: io::Write>(
     properties: &mut VcdWriterProperties,
-    scope: Option<&mut Scope>,
     memory_element_part_body: MemoryElementPartBody,
     writer: &mut W,
     var_type: &str,
     size: usize,
     location: TraceLocation,
-    name: Interned<str>,
+    name: VerilogIdentifier,
 ) -> io::Result<()> {
     let id = match location {
         TraceLocation::Scalar(id) => id.as_usize(),
@@ -488,21 +384,9 @@ fn write_vcd_var<W: io::Write>(
             first_id + *element_index
         }
     };
-    if let Some(scope) = scope {
+    write!(writer, "$var {var_type} {size} ")?;
-        let path_hash = scope.path_hash.clone().joined(name);
+    write_vcd_id(writer, id)?;
-        let name = scope.new_identifier(name);
+    writeln!(writer, " {name} $end")
-        let id = properties
-            .scalar_id_to_vcd_id_map
-            .builder_get_or_insert(id, &path_hash);
-        write!(writer, "$var {var_type} {size} ")?;
-        write_vcd_id(writer, id)?;
-        writeln!(writer, " {name} $end")
-    } else {
-        properties
-            .scalar_id_to_vcd_id_map
-            .builder_unused_scalar_id(id);
-        Ok(())
-    }
 }
 
 impl WriteTrace for TraceUInt {
@@ -530,13 +414,12 @@ impl WriteTrace for TraceUInt {
         }
         write_vcd_var(
             properties,
-            scope,
             MemoryElementPartBody::Scalar,
             writer,
             var_type,
             ty.width(),
             location,
-            name,
+            scope.new_identifier(name),
         )
     }
 }
@@ -611,13 +494,12 @@ impl WriteTrace for TraceEnumDiscriminant {
         } = self;
         write_vcd_var(
             properties,
-            scope,
             MemoryElementPartBody::EnumDiscriminant { ty },
             writer,
             "string",
             1,
             location,
-            name,
+            scope.new_identifier(name),
         )
     }
 }
@@ -687,13 +569,12 @@ impl WriteTrace for TracePhantomConst {
         } = self;
         write_vcd_var(
             properties,
-            scope,
             MemoryElementPartBody::Scalar,
             writer,
             "string",
             1,
             location,
-            name,
+            scope.new_identifier(name),
         )
     }
 }
@@ -715,13 +596,12 @@ impl WriteTrace for TraceSimOnly {
         } = self;
         write_vcd_var(
             properties,
-            scope,
             MemoryElementPartBody::Scalar,
             writer,
             "string",
             1,
             location,
-            name,
+            scope.new_identifier(name),
         )
     }
 }
@@ -745,24 +625,14 @@ impl WriteTrace for TraceScope {
 
 impl WriteTrace for TraceModule {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
-        let ArgModule {
+        let ArgModule { properties, scope } = arg.module();
-            properties,
-            scope,
-            instance_name,
-        } = arg.module();
         let Self { name, children } = self;
-        write_vcd_scope(
+        write_vcd_scope(writer, "module", name, scope, |writer, scope| {
-            writer,
+            for child in children {
-            "module",
+                child.write_trace(writer, ArgModuleBody { properties, scope })?;
-            instance_name.unwrap_or(name),
+            }
-            scope,
+            Ok(())
-            |writer, scope| {
+        })
-                for child in children {
-                    child.write_trace(writer, ArgModuleBody { properties, scope })?;
-                }
-                Ok(())
-            },
-        )
     }
 }
 
@@ -770,7 +640,7 @@ impl WriteTrace for TraceInstance {
     fn write_trace<W: io::Write, A: Arg>(self, writer: &mut W, mut arg: A) -> io::Result<()> {
         let ArgModuleBody { properties, scope } = arg.module_body();
         let Self {
-            name,
+            name: _,
             instance_io,
             module,
             ty: _,
@@ -782,17 +652,10 @@ impl WriteTrace for TraceInstance {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope: None,
+                scope,
             },
         )?;
-        module.write_trace(
+        module.write_trace(writer, ArgModule { properties, scope })
-            writer,
-            ArgModule {
-                properties,
-                scope,
-                instance_name: Some(name),
-            },
-        )
     }
 }
 
@@ -831,7 +694,7 @@ impl WriteTrace for TraceMem {
                                         sink_var_type: "reg",
                                         duplex_var_type: "reg",
                                         properties,
-                                        scope: Some(scope),
+                                        scope,
                                     },
                                 )
                             },
@@ -863,7 +726,7 @@ impl WriteTrace for TraceMemPort {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope: Some(scope),
+                scope,
             },
         )
     }
@@ -884,7 +747,7 @@ impl WriteTrace for TraceWire {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope: Some(scope),
+                scope,
             },
         )
     }
@@ -905,7 +768,7 @@ impl WriteTrace for TraceReg {
                 sink_var_type: "reg",
                 duplex_var_type: "reg",
                 properties,
-                scope: Some(scope),
+                scope,
             },
         )
     }
@@ -927,7 +790,7 @@ impl WriteTrace for TraceModuleIO {
                 sink_var_type: "wire",
                 duplex_var_type: "wire",
                 properties,
-                scope: Some(scope),
+                scope,
             },
         )
     }
@@ -948,7 +811,7 @@ impl WriteTrace for TraceBundle {
             ty: _,
             flow: _,
         } = self;
-        try_write_vcd_scope(writer, "struct", name, scope, |writer, mut scope| {
+        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
             for field in fields {
                 field.write_trace(
                     writer,
@@ -957,7 +820,7 @@ impl WriteTrace for TraceBundle {
                         sink_var_type,
                         duplex_var_type,
                         properties,
-                        scope: scope.as_deref_mut(),
+                        scope,
                     },
                 )?;
             }
@@ -981,7 +844,7 @@ impl WriteTrace for TraceArray {
             ty: _,
             flow: _,
         } = self;
-        try_write_vcd_scope(writer, "struct", name, scope, |writer, mut scope| {
+        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
             for element in elements {
                 element.write_trace(
                     writer,
@@ -990,7 +853,7 @@ impl WriteTrace for TraceArray {
                         sink_var_type,
                         duplex_var_type,
                         properties,
-                        scope: scope.as_deref_mut(),
+                        scope,
                     },
                 )?;
             }
@@ -1015,7 +878,7 @@ impl WriteTrace for TraceEnumWithFields {
             ty: _,
             flow: _,
         } = self;
-        try_write_vcd_scope(writer, "struct", name, scope, |writer, mut scope| {
+        write_vcd_scope(writer, "struct", name, scope, |writer, scope| {
             discriminant.write_trace(
                 writer,
                 ArgInType {
@@ -1023,7 +886,7 @@ impl WriteTrace for TraceEnumWithFields {
                     sink_var_type,
                     duplex_var_type,
                     properties,
-                    scope: scope.as_deref_mut(),
+                    scope,
                 },
             )?;
             for field in non_empty_fields {
@@ -1034,7 +897,7 @@ impl WriteTrace for TraceEnumWithFields {
                         sink_var_type,
                         duplex_var_type,
                         properties,
-                        scope: scope.as_deref_mut(),
+                        scope,
                     },
                 )?;
             }
@@ -1060,9 +923,6 @@ impl<W: io::Write> TraceWriterDecls for VcdWriterDecls<W> {
         writeln!(writer, "$timescale {} $end", vcd_timescale(timescale))?;
         let mut properties = VcdWriterProperties {
             next_scalar_id: trace_scalar_id_count,
-            scalar_id_to_vcd_id_map: ScalarIdToVcdIdMapOrBuilder::Builder(
-                ScalarIdToVcdIdMapBuilder::default(),
-            ),
             memory_properties: (0..trace_memory_id_count)
                 .map(|_| MemoryProperties {
                     element_parts: Vec::with_capacity(8),
@@ -1075,17 +935,9 @@ impl<W: io::Write> TraceWriterDecls for VcdWriterDecls<W> {
             &mut writer,
             ArgModule {
                 properties: &mut properties,
-                scope: &mut Scope::new(PathHash::default()),
+                scope: &mut Scope::default(),
-                instance_name: None,
             },
         )?;
-        let ScalarIdToVcdIdMapOrBuilder::Builder(scalar_id_to_vcd_id_map_builder) =
-            properties.scalar_id_to_vcd_id_map
-        else {
-            unreachable!();
-        };
-        properties.scalar_id_to_vcd_id_map =
-            ScalarIdToVcdIdMapOrBuilder::Built(scalar_id_to_vcd_id_map_builder.build());
         writeln!(writer, "$enddefinitions $end")?;
         writeln!(writer, "$dumpvars")?;
         Ok(VcdWriter {
@@ -1115,100 +967,8 @@ struct MemoryProperties {
     element_index: usize,
 }
 
-struct ScalarIdToVcdIdMap {
-    scalar_id_to_vcd_id_map: Box<[Option<VcdId>]>,
-}
-
-#[derive(Default)]
-struct ScalarIdToVcdIdMapBuilder {
-    scalar_id_to_vcd_id_map: BTreeMap<usize, Option<VcdId>>,
-    lower_half_to_next_upper_half_map: HashMap<u64, u64>,
-}
-
-impl ScalarIdToVcdIdMapBuilder {
-    fn unused_scalar_id(&mut self, scalar_id: usize) {
-        self.scalar_id_to_vcd_id_map
-            .entry(scalar_id)
-            .or_insert(None);
-    }
-    /// `VcdId`s are based off of `path_hash` (and not `scalar_id`) since the hash doesn't change
-    /// when unrelated variables are added/removed, making the generated VCD more friendly for git diff.
-    fn get_or_insert(&mut self, scalar_id: usize, path_hash: &PathHash) -> VcdId {
-        *self
-            .scalar_id_to_vcd_id_map
-            .entry(scalar_id)
-            .or_insert(None)
-            .get_or_insert_with(|| {
-                let hash = u128::from_le_bytes(
-                    *path_hash
-                        .0
-                        .clone()
-                        .finalize()
-                        .first_chunk()
-                        .expect("known to be bigger than u128"),
-                );
-                let lower_half = (hash % VcdId::LOW_HALF_MODULUS as u128) as u64;
-                let next_upper_half = self
-                    .lower_half_to_next_upper_half_map
-                    .entry(lower_half)
-                    .or_insert(if lower_half == 0 { 1 } else { 0 });
-                let upper_half = *next_upper_half;
-                *next_upper_half += 1;
-                let Some(id) = upper_half
-                    .checked_mul(VcdId::LOW_HALF_MODULUS)
-                    .and_then(|v| v.checked_add(lower_half))
-                else {
-                    panic!("too many VcdIds");
-                };
-                VcdId(NonZeroU64::new(id).expect("known to not be zero"))
-            })
-    }
-    fn build(self) -> ScalarIdToVcdIdMap {
-        ScalarIdToVcdIdMap {
-            scalar_id_to_vcd_id_map: self
-                .scalar_id_to_vcd_id_map
-                .into_iter()
-                .enumerate()
-                .map(|(index, (scalar_id, vcd_id))| {
-                    if index != scalar_id {
-                        panic!("missing scalar id {index}");
-                    }
-                    vcd_id
-                })
-                .collect(),
-        }
-    }
-}
-
-enum ScalarIdToVcdIdMapOrBuilder {
-    Builder(ScalarIdToVcdIdMapBuilder),
-    Built(ScalarIdToVcdIdMap),
-}
-
-impl ScalarIdToVcdIdMapOrBuilder {
-    fn built_scalar_id_to_vcd_id(&self, scalar_id: usize) -> Option<VcdId> {
-        let Self::Built(v) = self else {
-            panic!("ScalarIdToVcdIdMap isn't built yet");
-        };
-        v.scalar_id_to_vcd_id_map[scalar_id]
-    }
-    fn builder_get_or_insert(&mut self, scalar_id: usize, path_hash: &PathHash) -> VcdId {
-        let Self::Builder(v) = self else {
-            panic!("ScalarIdToVcdIdMap is already built");
-        };
-        v.get_or_insert(scalar_id, path_hash)
-    }
-    fn builder_unused_scalar_id(&mut self, scalar_id: usize) {
-        let Self::Builder(v) = self else {
-            panic!("ScalarIdToVcdIdMap is already built");
-        };
-        v.unused_scalar_id(scalar_id)
-    }
-}
-
 struct VcdWriterProperties {
     next_scalar_id: usize,
-    scalar_id_to_vcd_id_map: ScalarIdToVcdIdMapOrBuilder,
     memory_properties: Box<[MemoryProperties]>,
 }
 
@@ -1228,11 +988,8 @@ impl<W: io::Write + 'static> VcdWriter<W> {
 fn write_string_value_change(
     writer: &mut impl io::Write,
     value: impl fmt::Display,
-    id: Option<VcdId>,
+    id: usize,
 ) -> io::Result<()> {
-    let Some(id) = id else {
-        return Ok(());
-    };
     write!(writer, "s{} ", Escaped(value))?;
     write_vcd_id(writer, id)?;
     writer.write_all(b"\n")
@@ -1241,11 +998,8 @@ fn write_string_value_change(
 fn write_bits_value_change(
     writer: &mut impl io::Write,
     value: &BitSlice,
-    id: Option<VcdId>,
+    id: usize,
 ) -> io::Result<()> {
-    let Some(id) = id else {
-        return Ok(());
-    };
     match value.len() {
         0 => writer.write_all(b"s0 ")?,
         1 => writer.write_all(if value[0] { b"1" } else { b"0" })?,
@@ -1274,7 +1028,7 @@ fn write_enum_discriminant_value_change(
     writer: &mut impl io::Write,
     variant_index: usize,
     ty: Enum,
-    id: Option<VcdId>,
+    id: usize,
 ) -> io::Result<()> {
     write_string_value_change(
         writer,
@@ -1309,9 +1063,7 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
                 MemoryElementPartBody::Scalar => write_bits_value_change(
                     &mut self.writer,
                     &element_data[start..start + len],
-                    self.properties
+                    first_id + element_index,
-                        .scalar_id_to_vcd_id_map
-                        .built_scalar_id_to_vcd_id(first_id + element_index),
                 )?,
                 MemoryElementPartBody::EnumDiscriminant { ty } => {
                     let mut variant_index = 0;
@@ -1321,9 +1073,7 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
                         &mut self.writer,
                         variant_index,
                         *ty,
-                        self.properties
+                        first_id + element_index,
-                            .scalar_id_to_vcd_id_map
-                            .built_scalar_id_to_vcd_id(first_id + element_index),
                     )?
                 }
             }
@@ -1332,23 +1082,11 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
     }
 
     fn set_signal_uint(&mut self, id: TraceScalarId, value: &BitSlice) -> Result<(), Self::Error> {
-        write_bits_value_change(
+        write_bits_value_change(&mut self.writer, value, id.as_usize())
-            &mut self.writer,
-            value,
-            self.properties
-                .scalar_id_to_vcd_id_map
-                .built_scalar_id_to_vcd_id(id.as_usize()),
-        )
     }
 
     fn set_signal_sint(&mut self, id: TraceScalarId, value: &BitSlice) -> Result<(), Self::Error> {
-        write_bits_value_change(
+        write_bits_value_change(&mut self.writer, value, id.as_usize())
-            &mut self.writer,
-            value,
-            self.properties
-                .scalar_id_to_vcd_id_map
-                .built_scalar_id_to_vcd_id(id.as_usize()),
-        )
     }
 
     fn finish_init(&mut self) -> Result<(), Self::Error> {
@@ -1380,14 +1118,7 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
         variant_index: usize,
         ty: Enum,
     ) -> Result<(), Self::Error> {
-        write_enum_discriminant_value_change(
+        write_enum_discriminant_value_change(&mut self.writer, variant_index, ty, id.as_usize())
-            &mut self.writer,
-            variant_index,
-            ty,
-            self.properties
-                .scalar_id_to_vcd_id_map
-                .built_scalar_id_to_vcd_id(id.as_usize()),
-        )
     }
 
     fn set_signal_phantom_const(
@@ -1397,13 +1128,7 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
     ) -> Result<(), Self::Error> {
         // avoid multi-line strings because GTKWave can't display them properly:
         // https://github.com/gtkwave/gtkwave/issues/460
-        write_string_value_change(
+        write_string_value_change(&mut self.writer, format_args!("{ty:?}"), id.as_usize())
-            &mut self.writer,
-            format_args!("{ty:?}"),
-            self.properties
-                .scalar_id_to_vcd_id_map
-                .built_scalar_id_to_vcd_id(id.as_usize()),
-        )
     }
 
     fn set_signal_sim_only_value(
@@ -1411,13 +1136,7 @@ impl<W: io::Write> TraceWriter for VcdWriter<W> {
         id: TraceScalarId,
         value: &DynSimOnlyValue,
     ) -> Result<(), Self::Error> {
-        write_string_value_change(
+        write_string_value_change(&mut self.writer, format_args!("{value:?}"), id.as_usize())
-            &mut self.writer,
-            format_args!("{value:?}"),
-            self.properties
-                .scalar_id_to_vcd_id_map
-                .built_scalar_id_to_vcd_id(id.as_usize()),
-        )
     }
 }
 
@@ -1442,7 +1161,7 @@ mod tests {
 
     #[test]
     fn test_scope() {
-        let mut scope = Scope::new(PathHash::default());
+        let mut scope = Scope::default();
         assert_eq!(&*scope.new_identifier("foo".intern()).unescaped_name, "foo");
         assert_eq!(
             &*scope.new_identifier("foo_0".intern()).unescaped_name,

crates/fayalite/src/ty.rs

@@ -367,15 +367,7 @@ impl<D: Type> TypeOrDefault<D> for crate::__ {
 }
 
 pub trait Type:
-    Copy
+    Copy + Hash + Eq + fmt::Debug + Send + Sync + 'static + FillInDefaultedGenerics<Type = Self>
-    + Hash
-    + Eq
-    + fmt::Debug
-    + Send
-    + Sync
-    + 'static
-    + FillInDefaultedGenerics<Type = Self>
-    + SimValueDebug
 {
     type BaseType: BaseType;
     type MaskType: Type<MaskType = Self::MaskType>;
@@ -410,16 +402,6 @@ pub trait Type:
     ) -> OpaqueSimValueWritten<'w>;
 }
 
-pub trait SimValueDebug {
-    fn sim_value_debug(value: &<Self as Type>::SimValue, f: &mut fmt::Formatter<'_>) -> fmt::Result
-    where
-        Self: Type;
-}
-
-pub trait SimValueDisplay: Type {
-    fn sim_value_display(value: &Self::SimValue, f: &mut fmt::Formatter<'_>) -> fmt::Result;
-}
-
 pub trait BaseType:
     Type<
         BaseType = Self,
@@ -508,15 +490,6 @@ impl Type for CanonicalType {
     }
 }
 
-impl SimValueDebug for CanonicalType {
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        fmt::Debug::fmt(value, f)
-    }
-}
-
 #[derive(Clone, PartialEq, Eq, Hash, Debug, Serialize, Deserialize, Default)]
 #[non_exhaustive]
 pub struct OpaqueSimValueSizeRange {

crates/fayalite/src/util.rs

@@ -41,7 +41,7 @@ pub use misc::{
     os_str_strip_suffix, serialize_to_json_ascii, serialize_to_json_ascii_pretty,
     serialize_to_json_ascii_pretty_with_indent, slice_range, try_slice_range,
 };
-pub(crate) use misc::{InternedStrCompareAsStr, chain, copy_le_bytes_to_bitslice};
+pub(crate) use misc::{InternedStrCompareAsStr, chain};
 
 pub mod job_server;
 pub mod prefix_sum;

crates/fayalite/src/util/misc.rs

@@ -612,43 +612,3 @@ impl std::borrow::Borrow<str> for InternedStrCompareAsStr {
         &self.0
     }
 }
-
-pub(crate) fn copy_le_bytes_to_bitslice(
-    dest: &mut BitSlice<usize, Lsb0>,
-    bytes: &[u8],
-    msb_fill: bool,
-) {
-    let (chunks, remainder) = bytes.as_chunks();
-    let mut filled_to = 0;
-    for (i, chunk) in chunks.iter().enumerate() {
-        if let Some(start_bit_index) = i.checked_mul(usize::BITS as usize)
-            && start_bit_index < dest.len()
-        {
-            let end_bit_index = start_bit_index
-                .saturating_add(usize::BITS as usize)
-                .min(dest.len());
-            let bit_len = end_bit_index - start_bit_index;
-            let chunk = usize::from_le_bytes(*chunk);
-            dest[start_bit_index..end_bit_index].copy_from_bitslice(&chunk.view_bits()[..bit_len]);
-            filled_to = end_bit_index;
-        } else {
-            break;
-        }
-    }
-    if !remainder.is_empty() {
-        if let Some(start_bit_index) = chunks.len().checked_mul(usize::BITS as usize)
-            && start_bit_index < dest.len()
-        {
-            let end_bit_index = start_bit_index
-                .saturating_add(usize::BITS as usize)
-                .min(dest.len());
-            let bit_len = end_bit_index - start_bit_index;
-            let mut chunk = [if msb_fill { !0 } else { 0 }; _];
-            chunk[..remainder.len()].copy_from_slice(remainder);
-            let chunk = usize::from_le_bytes(chunk);
-            dest[start_bit_index..end_bit_index].copy_from_bitslice(&chunk.view_bits()[..bit_len]);
-            filled_to = end_bit_index;
-        }
-    }
-    dest[filled_to..].fill(msb_fill);
-}

crates/fayalite/tests/hdl_types.rs

@@ -244,13 +244,3 @@ pub struct MyTypeWithPrivateMembersWithArg<T> {
     pub(crate) b: MyPubCrateTypeWithArg<T>,
     pub c: T,
 }
-
-#[hdl(outline_generated)]
-pub enum EnumWithOnlyOneVariant {
-    A,
-}
-
-#[hdl(outline_generated)]
-pub enum EnumWithOnlyOneVariant2<T> {
-    A(T),
-}

crates/fayalite/tests/hdl_types_fmt.rs

@@ -1,166 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-use fayalite::{prelude::*, ty::SimValueDebug};
-use std::fmt;
-
-#[hdl(outline_generated)]
-struct MyStruct0<T, S: Size> {
-    v: T,
-    a: ArrayType<UInt<8>, S>,
-}
-
-#[hdl]
-#[test]
-fn check_my_struct0() {
-    let ty = MyStruct0[UInt[8]][3];
-    assert_eq!(
-        format!("{ty:?}"),
-        "MyStruct0 { v: UInt<8>, a: Array<UInt<8>, 3> }",
-    );
-    assert_eq!(
-        format!("{:?}", ty.mask_type()),
-        "MaskType<MyStruct0> { v: Bool, a: Array<Bool, 3> }",
-    );
-    let v = #[hdl(sim)]
-    MyStruct0::<_, _> {
-        v: 0x23u8,
-        a: [1u8, 2, 3],
-    };
-    assert_eq!(
-        format!("{v:?}"),
-        "MyStruct0 { v: 0x23_u8, a: [0x1_u8, 0x2_u8, 0x3_u8] }",
-    );
-}
-
-#[hdl(outline_generated, custom_debug())]
-struct MyStruct1<T, S: Size> {
-    v: T,
-    a: ArrayType<UInt<8>, S>,
-}
-
-impl<T: Type, S: Size> fmt::Debug for MyStruct1<T, S> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let Self { v, a } = self;
-        f.debug_struct("Custom<MyStruct1>")
-            .field("v", v)
-            .field("a", a)
-            .finish()
-    }
-}
-
-impl<T: Type, S: Size> SimValueDebug for MyStruct1<T, S> {
-    #[hdl]
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        #[hdl(sim)]
-        let Self { v, a } = value;
-        f.debug_struct("Custom<MyStruct1>")
-            .field("v", &v)
-            .field("a", &a)
-            .finish()
-    }
-}
-
-#[hdl]
-#[test]
-fn check_my_struct1() {
-    let ty = MyStruct1[UInt[8]][3];
-    assert_eq!(
-        format!("{ty:?}"),
-        "Custom<MyStruct1> { v: UInt<8>, a: Array<UInt<8>, 3> }",
-    );
-    assert_eq!(
-        format!("{:?}", ty.mask_type()),
-        "MaskType<MyStruct1> { v: Bool, a: Array<Bool, 3> }",
-    );
-    let v = #[hdl(sim)]
-    MyStruct1::<_, _> {
-        v: 0x23u8,
-        a: [1u8, 2, 3],
-    };
-    assert_eq!(
-        format!("{v:?}"),
-        "Custom<MyStruct1> { v: 0x23_u8, a: [0x1_u8, 0x2_u8, 0x3_u8] }",
-    );
-}
-
-#[hdl(outline_generated)]
-enum MyEnum0<T, S: Size> {
-    Unit,
-    V(T),
-    A(ArrayType<UInt<8>, S>),
-}
-
-#[hdl]
-#[test]
-fn check_my_enum0() {
-    let ty = MyEnum0[UInt[8]][3];
-    assert_eq!(
-        format!("{ty:?}"),
-        "MyEnum0 { Unit: (), V: UInt<8>, A: Array<UInt<8>, 3> }",
-    );
-    let v = #[hdl(sim)]
-    ty.Unit();
-    assert_eq!(format!("{v:?}"), "Unit");
-    let v = #[hdl(sim)]
-    ty.V(0x23u8);
-    assert_eq!(format!("{v:?}"), "V(0x23_u8)");
-    let v = #[hdl(sim)]
-    ty.A([1u8, 2, 3]);
-    assert_eq!(format!("{v:?}"), "A([0x1_u8, 0x2_u8, 0x3_u8])");
-}
-
-#[hdl(outline_generated, custom_debug())]
-enum MyEnum1<T, S: Size> {
-    Unit,
-    V(T),
-    A(ArrayType<UInt<8>, S>),
-}
-
-impl<T: Type, S: Size> fmt::Debug for MyEnum1<T, S> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let Self { Unit, V, A } = self;
-        f.debug_struct("Custom<MyEnum1>")
-            .field("Unit", Unit)
-            .field("V", V)
-            .field("A", A)
-            .finish()
-    }
-}
-
-impl<T: Type, S: Size> SimValueDebug for MyEnum1<T, S> {
-    #[hdl]
-    fn sim_value_debug(
-        value: &<Self as Type>::SimValue,
-        f: &mut fmt::Formatter<'_>,
-    ) -> fmt::Result {
-        type SimValueT<T> = <T as Type>::SimValue;
-        match value {
-            SimValueT::<Self>::Unit(_) => f.write_str("MyEnum1::Unit"),
-            SimValueT::<Self>::V(v, _) => f.debug_tuple("MyEnum1::V").field(v).finish(),
-            SimValueT::<Self>::A(a, _) => f.debug_tuple("MyEnum1::A").field(a).finish(),
-            SimValueT::<Self>::Unknown(_) => f.write_str("MyEnum1::Unknown"),
-        }
-    }
-}
-
-#[hdl]
-#[test]
-fn check_my_enum1() {
-    let ty = MyEnum1[UInt[8]][3];
-    assert_eq!(
-        format!("{ty:?}"),
-        "Custom<MyEnum1> { Unit: (), V: UInt<8>, A: Array<UInt<8>, 3> }",
-    );
-    let v = #[hdl(sim)]
-    ty.Unit();
-    assert_eq!(format!("{v:?}"), "MyEnum1::Unit");
-    let v = #[hdl(sim)]
-    ty.V(0x23u8);
-    assert_eq!(format!("{v:?}"), "MyEnum1::V(0x23_u8)");
-    let v = #[hdl(sim)]
-    ty.A([1u8, 2, 3]);
-    assert_eq!(format!("{v:?}"), "MyEnum1::A([0x1_u8, 0x2_u8, 0x3_u8])");
-}

crates/fayalite/tests/module.rs

@@ -13,7 +13,7 @@ use fayalite::{
 };
 use serde_json::json;
 
-#[hdl(outline_generated, cmp_eq)]
+#[hdl(outline_generated)]
 pub enum TestEnum {
     A,
     B(UInt<8>),
@@ -679,366 +679,6 @@ circuit check_enum_literals:
     };
 }
 
-#[hdl_module(outline_generated)]
-pub fn check_enum_cmp_eq() {
-    #[hdl]
-    let lhs: TestEnum = m.input();
-    #[hdl]
-    let rhs: TestEnum = m.input();
-    #[hdl]
-    let eq: Bool = m.output();
-    connect(eq, lhs.cmp_eq(rhs));
-}
-
-#[test]
-fn test_enum_cmp_eq() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let m = check_enum_cmp_eq();
-    dbg!(m);
-    #[rustfmt::skip] // work around https://github.com/rust-lang/rustfmt/issues/6161
-    assert_export_firrtl! {
-        m =>
-        options: ExportOptions {
-            simplify_enums: None,
-            ..ExportOptions::default()
-        },
-        "/test/check_enum_cmp_eq.fir": r"FIRRTL version 3.2.0
-circuit check_enum_cmp_eq:
-    type Ty0 = {|A, B: UInt<8>, C: UInt<1>[3]|}
-    module check_enum_cmp_eq: @[module-XXXXXXXXXX.rs 1:1]
-        input lhs: Ty0 @[module-XXXXXXXXXX.rs 2:1]
-        input rhs: Ty0 @[module-XXXXXXXXXX.rs 3:1]
-        output eq: UInt<1> @[module-XXXXXXXXXX.rs 4:1]
-        wire TestEnum_cmp_eq: UInt<1> @[module-XXXXXXXXXX.rs 5:1]
-        connect TestEnum_cmp_eq, UInt<1>(0h0) @[module-XXXXXXXXXX.rs 5:1]
-        match lhs: @[module-XXXXXXXXXX.rs 5:1]
-            A:
-                match rhs: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        connect TestEnum_cmp_eq, UInt<1>(0h1) @[module-XXXXXXXXXX.rs 5:1]
-                    B(_match_arm_value):
-                        skip
-                    C(_match_arm_value_1):
-                        skip
-            B(_match_arm_value_2):
-                match rhs: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        skip
-                    B(_match_arm_value_3):
-                        connect TestEnum_cmp_eq, eq(_match_arm_value_2, _match_arm_value_3) @[module-XXXXXXXXXX.rs 5:1]
-                    C(_match_arm_value_4):
-                        skip
-            C(_match_arm_value_5):
-                match rhs: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        skip
-                    B(_match_arm_value_6):
-                        skip
-                    C(_match_arm_value_7):
-                        wire _array_literal_expr: UInt<1>[3]
-                        connect _array_literal_expr[0], eq(_match_arm_value_5[0], _match_arm_value_7[0])
-                        connect _array_literal_expr[1], eq(_match_arm_value_5[1], _match_arm_value_7[1])
-                        connect _array_literal_expr[2], eq(_match_arm_value_5[2], _match_arm_value_7[2])
-                        wire _cast_array_to_bits_expr: UInt<1>[3]
-                        connect _cast_array_to_bits_expr[0], _array_literal_expr[0]
-                        connect _cast_array_to_bits_expr[1], _array_literal_expr[1]
-                        connect _cast_array_to_bits_expr[2], _array_literal_expr[2]
-                        wire _cast_to_bits_expr: UInt<3>
-                        connect _cast_to_bits_expr, cat(_cast_array_to_bits_expr[2], cat(_cast_array_to_bits_expr[1], _cast_array_to_bits_expr[0]))
-                        connect TestEnum_cmp_eq, andr(_cast_to_bits_expr) @[module-XXXXXXXXXX.rs 5:1]
-        connect eq, TestEnum_cmp_eq @[module-XXXXXXXXXX.rs 6:1]
-",
-    };
-    #[rustfmt::skip] // work around https://github.com/rust-lang/rustfmt/issues/6161
-    assert_export_firrtl! {
-        m =>
-        options: ExportOptions {
-            simplify_enums: Some(SimplifyEnumsKind::SimplifyToEnumsWithNoBody),
-            ..ExportOptions::default()
-        },
-        "/test/check_enum_cmp_eq.fir": r"FIRRTL version 3.2.0
-circuit check_enum_cmp_eq:
-    type Ty0 = {|A, B, C|}
-    type Ty1 = {tag: Ty0, body: UInt<8>}
-    module check_enum_cmp_eq: @[module-XXXXXXXXXX.rs 1:1]
-        input lhs: Ty1 @[module-XXXXXXXXXX.rs 2:1]
-        input rhs: Ty1 @[module-XXXXXXXXXX.rs 3:1]
-        output eq: UInt<1> @[module-XXXXXXXXXX.rs 4:1]
-        wire TestEnum_cmp_eq: UInt<1> @[module-XXXXXXXXXX.rs 5:1]
-        connect TestEnum_cmp_eq, UInt<1>(0h0) @[module-XXXXXXXXXX.rs 5:1]
-        match lhs.tag: @[module-XXXXXXXXXX.rs 5:1]
-            A:
-                match rhs.tag: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        connect TestEnum_cmp_eq, UInt<1>(0h1) @[module-XXXXXXXXXX.rs 5:1]
-                    B:
-                        skip
-                    C:
-                        skip
-            B:
-                match rhs.tag: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        skip
-                    B:
-                        connect TestEnum_cmp_eq, eq(bits(lhs.body, 7, 0), bits(rhs.body, 7, 0)) @[module-XXXXXXXXXX.rs 5:1]
-                    C:
-                        skip
-            C:
-                match rhs.tag: @[module-XXXXXXXXXX.rs 5:1]
-                    A:
-                        skip
-                    B:
-                        skip
-                    C:
-                        wire _array_literal_expr: UInt<1>[3]
-                        wire _cast_bits_to_array_expr: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened[0], bits(bits(lhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr[0], _cast_bits_to_array_expr_flattened[0]
-                        connect _cast_bits_to_array_expr_flattened[1], bits(bits(lhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr[1], _cast_bits_to_array_expr_flattened[1]
-                        connect _cast_bits_to_array_expr_flattened[2], bits(bits(lhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr[2], _cast_bits_to_array_expr_flattened[2]
-                        wire _cast_bits_to_array_expr_1: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened_1: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened_1[0], bits(bits(rhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr_1[0], _cast_bits_to_array_expr_flattened_1[0]
-                        connect _cast_bits_to_array_expr_flattened_1[1], bits(bits(rhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr_1[1], _cast_bits_to_array_expr_flattened_1[1]
-                        connect _cast_bits_to_array_expr_flattened_1[2], bits(bits(rhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr_1[2], _cast_bits_to_array_expr_flattened_1[2]
-                        connect _array_literal_expr[0], eq(_cast_bits_to_array_expr[0], _cast_bits_to_array_expr_1[0])
-                        wire _cast_bits_to_array_expr_2: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened_2: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened_2[0], bits(bits(lhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr_2[0], _cast_bits_to_array_expr_flattened_2[0]
-                        connect _cast_bits_to_array_expr_flattened_2[1], bits(bits(lhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_flattened_2[1]
-                        connect _cast_bits_to_array_expr_flattened_2[2], bits(bits(lhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr_2[2], _cast_bits_to_array_expr_flattened_2[2]
-                        wire _cast_bits_to_array_expr_3: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened_3: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened_3[0], bits(bits(rhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr_3[0], _cast_bits_to_array_expr_flattened_3[0]
-                        connect _cast_bits_to_array_expr_flattened_3[1], bits(bits(rhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr_3[1], _cast_bits_to_array_expr_flattened_3[1]
-                        connect _cast_bits_to_array_expr_flattened_3[2], bits(bits(rhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr_3[2], _cast_bits_to_array_expr_flattened_3[2]
-                        connect _array_literal_expr[1], eq(_cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_3[1])
-                        wire _cast_bits_to_array_expr_4: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened_4: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened_4[0], bits(bits(lhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr_4[0], _cast_bits_to_array_expr_flattened_4[0]
-                        connect _cast_bits_to_array_expr_flattened_4[1], bits(bits(lhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr_4[1], _cast_bits_to_array_expr_flattened_4[1]
-                        connect _cast_bits_to_array_expr_flattened_4[2], bits(bits(lhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_flattened_4[2]
-                        wire _cast_bits_to_array_expr_5: UInt<1>[3]
-                        wire _cast_bits_to_array_expr_flattened_5: UInt<1>[3]
-                        connect _cast_bits_to_array_expr_flattened_5[0], bits(bits(rhs.body, 2, 0), 0, 0)
-                        connect _cast_bits_to_array_expr_5[0], _cast_bits_to_array_expr_flattened_5[0]
-                        connect _cast_bits_to_array_expr_flattened_5[1], bits(bits(rhs.body, 2, 0), 1, 1)
-                        connect _cast_bits_to_array_expr_5[1], _cast_bits_to_array_expr_flattened_5[1]
-                        connect _cast_bits_to_array_expr_flattened_5[2], bits(bits(rhs.body, 2, 0), 2, 2)
-                        connect _cast_bits_to_array_expr_5[2], _cast_bits_to_array_expr_flattened_5[2]
-                        connect _array_literal_expr[2], eq(_cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_5[2])
-                        wire _cast_array_to_bits_expr: UInt<1>[3]
-                        connect _cast_array_to_bits_expr[0], _array_literal_expr[0]
-                        connect _cast_array_to_bits_expr[1], _array_literal_expr[1]
-                        connect _cast_array_to_bits_expr[2], _array_literal_expr[2]
-                        wire _cast_to_bits_expr: UInt<3>
-                        connect _cast_to_bits_expr, cat(_cast_array_to_bits_expr[2], cat(_cast_array_to_bits_expr[1], _cast_array_to_bits_expr[0]))
-                        connect TestEnum_cmp_eq, andr(_cast_to_bits_expr) @[module-XXXXXXXXXX.rs 5:1]
-        connect eq, TestEnum_cmp_eq @[module-XXXXXXXXXX.rs 6:1]
-",
-    };
-    #[rustfmt::skip] // work around https://github.com/rust-lang/rustfmt/issues/6161
-    assert_export_firrtl! {
-        m =>
-        options: ExportOptions {
-            simplify_enums: Some(SimplifyEnumsKind::ReplaceWithBundleOfUInts),
-            ..ExportOptions::default()
-        },
-        "/test/check_enum_cmp_eq.fir": r"FIRRTL version 3.2.0
-circuit check_enum_cmp_eq:
-    type Ty0 = {tag: UInt<2>, body: UInt<8>}
-    module check_enum_cmp_eq: @[module-XXXXXXXXXX.rs 1:1]
-        input lhs: Ty0 @[module-XXXXXXXXXX.rs 2:1]
-        input rhs: Ty0 @[module-XXXXXXXXXX.rs 3:1]
-        output eq: UInt<1> @[module-XXXXXXXXXX.rs 4:1]
-        wire TestEnum_cmp_eq: UInt<1> @[module-XXXXXXXXXX.rs 5:1]
-        connect TestEnum_cmp_eq, UInt<1>(0h0) @[module-XXXXXXXXXX.rs 5:1]
-        when eq(lhs.tag, UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-            when eq(rhs.tag, UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-                connect TestEnum_cmp_eq, UInt<1>(0h1) @[module-XXXXXXXXXX.rs 5:1]
-            else when eq(rhs.tag, UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-                skip
-        else when eq(lhs.tag, UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-            when eq(rhs.tag, UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-                skip
-            else when eq(rhs.tag, UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-                connect TestEnum_cmp_eq, eq(bits(lhs.body, 7, 0), bits(rhs.body, 7, 0)) @[module-XXXXXXXXXX.rs 5:1]
-        else when eq(rhs.tag, UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-            skip
-        else when eq(rhs.tag, UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-            skip
-        else:
-            wire _array_literal_expr: UInt<1>[3]
-            wire _cast_bits_to_array_expr: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened[0], bits(bits(lhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr[0], _cast_bits_to_array_expr_flattened[0]
-            connect _cast_bits_to_array_expr_flattened[1], bits(bits(lhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr[1], _cast_bits_to_array_expr_flattened[1]
-            connect _cast_bits_to_array_expr_flattened[2], bits(bits(lhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr[2], _cast_bits_to_array_expr_flattened[2]
-            wire _cast_bits_to_array_expr_1: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_1: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_1[0], bits(bits(rhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_1[0], _cast_bits_to_array_expr_flattened_1[0]
-            connect _cast_bits_to_array_expr_flattened_1[1], bits(bits(rhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_1[1], _cast_bits_to_array_expr_flattened_1[1]
-            connect _cast_bits_to_array_expr_flattened_1[2], bits(bits(rhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_1[2], _cast_bits_to_array_expr_flattened_1[2]
-            connect _array_literal_expr[0], eq(_cast_bits_to_array_expr[0], _cast_bits_to_array_expr_1[0])
-            wire _cast_bits_to_array_expr_2: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_2: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_2[0], bits(bits(lhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_2[0], _cast_bits_to_array_expr_flattened_2[0]
-            connect _cast_bits_to_array_expr_flattened_2[1], bits(bits(lhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_flattened_2[1]
-            connect _cast_bits_to_array_expr_flattened_2[2], bits(bits(lhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_2[2], _cast_bits_to_array_expr_flattened_2[2]
-            wire _cast_bits_to_array_expr_3: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_3: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_3[0], bits(bits(rhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_3[0], _cast_bits_to_array_expr_flattened_3[0]
-            connect _cast_bits_to_array_expr_flattened_3[1], bits(bits(rhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_3[1], _cast_bits_to_array_expr_flattened_3[1]
-            connect _cast_bits_to_array_expr_flattened_3[2], bits(bits(rhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_3[2], _cast_bits_to_array_expr_flattened_3[2]
-            connect _array_literal_expr[1], eq(_cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_3[1])
-            wire _cast_bits_to_array_expr_4: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_4: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_4[0], bits(bits(lhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_4[0], _cast_bits_to_array_expr_flattened_4[0]
-            connect _cast_bits_to_array_expr_flattened_4[1], bits(bits(lhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_4[1], _cast_bits_to_array_expr_flattened_4[1]
-            connect _cast_bits_to_array_expr_flattened_4[2], bits(bits(lhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_flattened_4[2]
-            wire _cast_bits_to_array_expr_5: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_5: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_5[0], bits(bits(rhs.body, 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_5[0], _cast_bits_to_array_expr_flattened_5[0]
-            connect _cast_bits_to_array_expr_flattened_5[1], bits(bits(rhs.body, 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_5[1], _cast_bits_to_array_expr_flattened_5[1]
-            connect _cast_bits_to_array_expr_flattened_5[2], bits(bits(rhs.body, 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_5[2], _cast_bits_to_array_expr_flattened_5[2]
-            connect _array_literal_expr[2], eq(_cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_5[2])
-            wire _cast_array_to_bits_expr: UInt<1>[3]
-            connect _cast_array_to_bits_expr[0], _array_literal_expr[0]
-            connect _cast_array_to_bits_expr[1], _array_literal_expr[1]
-            connect _cast_array_to_bits_expr[2], _array_literal_expr[2]
-            wire _cast_to_bits_expr: UInt<3>
-            connect _cast_to_bits_expr, cat(_cast_array_to_bits_expr[2], cat(_cast_array_to_bits_expr[1], _cast_array_to_bits_expr[0]))
-            connect TestEnum_cmp_eq, andr(_cast_to_bits_expr) @[module-XXXXXXXXXX.rs 5:1]
-        connect eq, TestEnum_cmp_eq @[module-XXXXXXXXXX.rs 6:1]
-",
-    };
-    #[rustfmt::skip] // work around https://github.com/rust-lang/rustfmt/issues/6161
-    assert_export_firrtl! {
-        m =>
-        options: ExportOptions {
-            simplify_enums: Some(SimplifyEnumsKind::ReplaceWithUInt),
-            ..ExportOptions::default()
-        },
-        "/test/check_enum_cmp_eq.fir": r"FIRRTL version 3.2.0
-circuit check_enum_cmp_eq:
-    module check_enum_cmp_eq: @[module-XXXXXXXXXX.rs 1:1]
-        input lhs: UInt<10> @[module-XXXXXXXXXX.rs 2:1]
-        input rhs: UInt<10> @[module-XXXXXXXXXX.rs 3:1]
-        output eq: UInt<1> @[module-XXXXXXXXXX.rs 4:1]
-        wire TestEnum_cmp_eq: UInt<1> @[module-XXXXXXXXXX.rs 5:1]
-        connect TestEnum_cmp_eq, UInt<1>(0h0) @[module-XXXXXXXXXX.rs 5:1]
-        when eq(bits(lhs, 1, 0), UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-            when eq(bits(rhs, 1, 0), UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-                connect TestEnum_cmp_eq, UInt<1>(0h1) @[module-XXXXXXXXXX.rs 5:1]
-            else when eq(bits(rhs, 1, 0), UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-                skip
-        else when eq(bits(lhs, 1, 0), UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-            when eq(bits(rhs, 1, 0), UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-                skip
-            else when eq(bits(rhs, 1, 0), UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-                connect TestEnum_cmp_eq, eq(bits(bits(lhs, 9, 2), 7, 0), bits(bits(rhs, 9, 2), 7, 0)) @[module-XXXXXXXXXX.rs 5:1]
-        else when eq(bits(rhs, 1, 0), UInt<2>(0h0)): @[module-XXXXXXXXXX.rs 5:1]
-            skip
-        else when eq(bits(rhs, 1, 0), UInt<2>(0h1)): @[module-XXXXXXXXXX.rs 5:1]
-            skip
-        else:
-            wire _array_literal_expr: UInt<1>[3]
-            wire _cast_bits_to_array_expr: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened[0], bits(bits(bits(lhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr[0], _cast_bits_to_array_expr_flattened[0]
-            connect _cast_bits_to_array_expr_flattened[1], bits(bits(bits(lhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr[1], _cast_bits_to_array_expr_flattened[1]
-            connect _cast_bits_to_array_expr_flattened[2], bits(bits(bits(lhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr[2], _cast_bits_to_array_expr_flattened[2]
-            wire _cast_bits_to_array_expr_1: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_1: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_1[0], bits(bits(bits(rhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_1[0], _cast_bits_to_array_expr_flattened_1[0]
-            connect _cast_bits_to_array_expr_flattened_1[1], bits(bits(bits(rhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_1[1], _cast_bits_to_array_expr_flattened_1[1]
-            connect _cast_bits_to_array_expr_flattened_1[2], bits(bits(bits(rhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_1[2], _cast_bits_to_array_expr_flattened_1[2]
-            connect _array_literal_expr[0], eq(_cast_bits_to_array_expr[0], _cast_bits_to_array_expr_1[0])
-            wire _cast_bits_to_array_expr_2: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_2: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_2[0], bits(bits(bits(lhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_2[0], _cast_bits_to_array_expr_flattened_2[0]
-            connect _cast_bits_to_array_expr_flattened_2[1], bits(bits(bits(lhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_flattened_2[1]
-            connect _cast_bits_to_array_expr_flattened_2[2], bits(bits(bits(lhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_2[2], _cast_bits_to_array_expr_flattened_2[2]
-            wire _cast_bits_to_array_expr_3: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_3: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_3[0], bits(bits(bits(rhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_3[0], _cast_bits_to_array_expr_flattened_3[0]
-            connect _cast_bits_to_array_expr_flattened_3[1], bits(bits(bits(rhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_3[1], _cast_bits_to_array_expr_flattened_3[1]
-            connect _cast_bits_to_array_expr_flattened_3[2], bits(bits(bits(rhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_3[2], _cast_bits_to_array_expr_flattened_3[2]
-            connect _array_literal_expr[1], eq(_cast_bits_to_array_expr_2[1], _cast_bits_to_array_expr_3[1])
-            wire _cast_bits_to_array_expr_4: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_4: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_4[0], bits(bits(bits(lhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_4[0], _cast_bits_to_array_expr_flattened_4[0]
-            connect _cast_bits_to_array_expr_flattened_4[1], bits(bits(bits(lhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_4[1], _cast_bits_to_array_expr_flattened_4[1]
-            connect _cast_bits_to_array_expr_flattened_4[2], bits(bits(bits(lhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_flattened_4[2]
-            wire _cast_bits_to_array_expr_5: UInt<1>[3]
-            wire _cast_bits_to_array_expr_flattened_5: UInt<1>[3]
-            connect _cast_bits_to_array_expr_flattened_5[0], bits(bits(bits(rhs, 9, 2), 2, 0), 0, 0)
-            connect _cast_bits_to_array_expr_5[0], _cast_bits_to_array_expr_flattened_5[0]
-            connect _cast_bits_to_array_expr_flattened_5[1], bits(bits(bits(rhs, 9, 2), 2, 0), 1, 1)
-            connect _cast_bits_to_array_expr_5[1], _cast_bits_to_array_expr_flattened_5[1]
-            connect _cast_bits_to_array_expr_flattened_5[2], bits(bits(bits(rhs, 9, 2), 2, 0), 2, 2)
-            connect _cast_bits_to_array_expr_5[2], _cast_bits_to_array_expr_flattened_5[2]
-            connect _array_literal_expr[2], eq(_cast_bits_to_array_expr_4[2], _cast_bits_to_array_expr_5[2])
-            wire _cast_array_to_bits_expr: UInt<1>[3]
-            connect _cast_array_to_bits_expr[0], _array_literal_expr[0]
-            connect _cast_array_to_bits_expr[1], _array_literal_expr[1]
-            connect _cast_array_to_bits_expr[2], _array_literal_expr[2]
-            wire _cast_to_bits_expr: UInt<3>
-            connect _cast_to_bits_expr, cat(_cast_array_to_bits_expr[2], cat(_cast_array_to_bits_expr[1], _cast_array_to_bits_expr[0]))
-            connect TestEnum_cmp_eq, andr(_cast_to_bits_expr) @[module-XXXXXXXXXX.rs 5:1]
-        connect eq, TestEnum_cmp_eq @[module-XXXXXXXXXX.rs 6:1]
-",
-    };
-}
-
 #[hdl_module(outline_generated)]
 pub fn check_struct_enum_match() {
     #[hdl]

crates/fayalite/tests/sim.rs

@@ -7,7 +7,7 @@ use fayalite::{
     prelude::*,
     reset::ResetType,
     sim::vcd::VcdWriterDecls,
-    util::{RcWriter, ready_valid::queue},
+    util::RcWriter,
 };
 use std::{collections::BTreeMap, num::NonZeroUsize, rc::Rc};
 
@@ -2495,349 +2495,3 @@ fn test_sim_read_past() {
         panic!();
     }
 }
-
-#[hdl_module(outline_generated)]
-pub fn last_connect() {
-    #[hdl]
-    let inp: HdlOption<Array<Bool, 4>> = m.input();
-    #[hdl]
-    let out: HdlOption<UInt<8>> = m.output();
-    connect(out, HdlNone());
-    #[hdl]
-    if let HdlSome(v) = inp {
-        #[hdl]
-        let w = wire();
-        connect(out, HdlSome(w));
-        connect(w, v.len() as u8);
-        for (i, v) in v.into_iter().enumerate() {
-            #[hdl]
-            if v {
-                connect(w, i as u8);
-            }
-        }
-    }
-}
-
-#[hdl]
-#[test]
-fn test_last_connect() {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let mut sim = Simulation::new(last_connect());
-    let mut writer = RcWriter::default();
-    sim.add_trace_writer(VcdWriterDecls::new(writer.clone()));
-    let bools = [false, true];
-    sim.write(sim.io().inp, HdlNone());
-    sim.advance_time(SimDuration::from_micros(1));
-    let expected: SimValue<HdlOption<UInt<8>>> = #[hdl(sim)]
-    HdlNone();
-    assert_eq!(sim.read(sim.io().out), expected);
-    for a in bools {
-        for b in bools {
-            for c in bools {
-                for d in bools {
-                    let inp = [a, b, c, d];
-                    sim.write(sim.io().inp, HdlSome(inp));
-                    sim.advance_time(SimDuration::from_micros(1));
-                    let mut expected = inp.len() as u8;
-                    for (i, v) in inp.into_iter().enumerate() {
-                        if v {
-                            expected = i as u8;
-                        }
-                    }
-                    let expected: SimValue<HdlOption<UInt<8>>> = #[hdl(sim)]
-                    HdlSome(expected);
-                    let out = sim.read(sim.io().out);
-                    println!("expected={expected:?} out={out:?} inp={inp:?}");
-                    assert_eq!(expected, out);
-                }
-            }
-        }
-    }
-    sim.flush_traces().unwrap();
-    let vcd = String::from_utf8(writer.take()).unwrap();
-    println!("####### VCD:\n{vcd}\n#######");
-    if vcd != include_str!("sim/expected/last_connect.vcd") {
-        panic!();
-    }
-    let sim_debug = format!("{sim:#?}");
-    println!("#######\n{sim_debug}\n#######");
-    if sim_debug != include_str!("sim/expected/last_connect.txt") {
-        panic!();
-    }
-}
-
-#[track_caller]
-#[hdl]
-fn test_queue_helper(
-    capacity: usize,
-    inp_ready_is_comb: bool,
-    out_valid_is_comb: bool,
-    expected_vcd: &str,
-    expected_sim_debug: &str,
-) {
-    let _n = SourceLocation::normalize_files_for_tests();
-    let mut sim = Simulation::new(queue(
-        UInt::<8>::new_static(),
-        NonZeroUsize::new(capacity).expect("capacity should be non-zero"),
-        inp_ready_is_comb,
-        out_valid_is_comb,
-    ));
-    let writer = RcWriter::default();
-    sim.add_trace_writer(VcdWriterDecls::new(writer.clone()));
-    struct DumpVcdOnDrop {
-        writer: Option<RcWriter>,
-    }
-    impl Drop for DumpVcdOnDrop {
-        fn drop(&mut self) {
-            if let Some(mut writer) = self.writer.take() {
-                let vcd = String::from_utf8(writer.take()).unwrap();
-                println!("####### VCD:\n{vcd}\n#######");
-            }
-        }
-    }
-    let mut writer = DumpVcdOnDrop {
-        writer: Some(writer),
-    };
-    sim.write_clock(sim.io().cd.clk, false);
-    sim.write_reset(sim.io().cd.rst, true);
-    let mut input_value = 0u8;
-    let mut expected_output_value = 0u8;
-    /// deterministic random numbers
-    fn rand(mut v: u32) -> bool {
-        // random 32-bit primes
-        v = v.wrapping_mul(0xF807B7EF).rotate_left(16);
-        v ^= 0xA1E24BBA; // random 32-bit constant
-        v = v.wrapping_mul(0xE9D30017).rotate_left(16);
-        v = v.wrapping_mul(0x3895AFFB).rotate_left(16);
-        v & 1 != 0
-    }
-    for cycle in 0..100u32 {
-        println!("cycle: {cycle}");
-        sim.write(
-            sim.io().inp.data,
-            if rand(cycle) {
-                #[hdl(sim)]
-                HdlSome(input_value)
-            } else {
-                #[hdl(sim)]
-                HdlNone()
-            },
-        );
-        sim.write_bool(sim.io().out.ready, rand(u32::MAX / 2 + cycle));
-        sim.advance_time(SimDuration::from_nanos(500));
-        if !sim.read_reset(sim.io().cd.rst) {
-            let inp_ready = sim.read_bool(sim.io().inp.ready);
-            if inp_ready {
-                #[hdl(sim)]
-                if let HdlSome(v) = sim.read(sim.io().inp.data) {
-                    println!("enqueued {v}, expected {input_value:#x}");
-                    assert_eq!(v.as_int(), input_value);
-                    input_value = input_value.wrapping_add(1);
-                }
-            }
-            let out_valid = #[hdl(sim)]
-            if let HdlSome(v) = sim.read(sim.io().out.data) {
-                if sim.read_bool(sim.io().out.ready) {
-                    println!("dequeued {v}, expected {expected_output_value:#x}");
-                    assert_eq!(v.as_int(), expected_output_value);
-                    expected_output_value = expected_output_value.wrapping_add(1);
-                }
-                true
-            } else {
-                false
-            };
-            assert!(inp_ready || out_valid, "queue isn't making progress");
-        }
-        sim.write_clock(sim.io().cd.clk, true);
-        sim.advance_time(SimDuration::from_nanos(500));
-        sim.write_clock(sim.io().cd.clk, false);
-        sim.write_reset(sim.io().cd.rst, false);
-    }
-    sim.flush_traces().unwrap();
-    let vcd = String::from_utf8(writer.writer.take().unwrap().take()).unwrap();
-    println!("####### VCD:\n{vcd}\n#######");
-    if vcd != expected_vcd {
-        panic!();
-    }
-    let sim_debug = format!("{sim:#?}");
-    println!("#######\n{sim_debug}\n#######");
-    if sim_debug != expected_sim_debug {
-        panic!();
-    }
-}
-
-#[test]
-fn test_queue_1_false_false() {
-    test_queue_helper(
-        1,
-        false,
-        false,
-        include_str!("sim/expected/queue_1_false_false.vcd"),
-        include_str!("sim/expected/queue_1_false_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_1_false_true() {
-    test_queue_helper(
-        1,
-        false,
-        true,
-        include_str!("sim/expected/queue_1_false_true.vcd"),
-        include_str!("sim/expected/queue_1_false_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_1_true_false() {
-    test_queue_helper(
-        1,
-        true,
-        false,
-        include_str!("sim/expected/queue_1_true_false.vcd"),
-        include_str!("sim/expected/queue_1_true_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_1_true_true() {
-    test_queue_helper(
-        1,
-        true,
-        true,
-        include_str!("sim/expected/queue_1_true_true.vcd"),
-        include_str!("sim/expected/queue_1_true_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_2_false_false() {
-    test_queue_helper(
-        2,
-        false,
-        false,
-        include_str!("sim/expected/queue_2_false_false.vcd"),
-        include_str!("sim/expected/queue_2_false_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_2_false_true() {
-    test_queue_helper(
-        2,
-        false,
-        true,
-        include_str!("sim/expected/queue_2_false_true.vcd"),
-        include_str!("sim/expected/queue_2_false_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_2_true_false() {
-    test_queue_helper(
-        2,
-        true,
-        false,
-        include_str!("sim/expected/queue_2_true_false.vcd"),
-        include_str!("sim/expected/queue_2_true_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_2_true_true() {
-    test_queue_helper(
-        2,
-        true,
-        true,
-        include_str!("sim/expected/queue_2_true_true.vcd"),
-        include_str!("sim/expected/queue_2_true_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_3_false_false() {
-    test_queue_helper(
-        3,
-        false,
-        false,
-        include_str!("sim/expected/queue_3_false_false.vcd"),
-        include_str!("sim/expected/queue_3_false_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_3_false_true() {
-    test_queue_helper(
-        3,
-        false,
-        true,
-        include_str!("sim/expected/queue_3_false_true.vcd"),
-        include_str!("sim/expected/queue_3_false_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_3_true_false() {
-    test_queue_helper(
-        3,
-        true,
-        false,
-        include_str!("sim/expected/queue_3_true_false.vcd"),
-        include_str!("sim/expected/queue_3_true_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_3_true_true() {
-    test_queue_helper(
-        3,
-        true,
-        true,
-        include_str!("sim/expected/queue_3_true_true.vcd"),
-        include_str!("sim/expected/queue_3_true_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_4_false_false() {
-    test_queue_helper(
-        4,
-        false,
-        false,
-        include_str!("sim/expected/queue_4_false_false.vcd"),
-        include_str!("sim/expected/queue_4_false_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_4_false_true() {
-    test_queue_helper(
-        4,
-        false,
-        true,
-        include_str!("sim/expected/queue_4_false_true.vcd"),
-        include_str!("sim/expected/queue_4_false_true.txt"),
-    );
-}
-
-#[test]
-fn test_queue_4_true_false() {
-    test_queue_helper(
-        4,
-        true,
-        false,
-        include_str!("sim/expected/queue_4_true_false.vcd"),
-        include_str!("sim/expected/queue_4_true_false.txt"),
-    );
-}
-
-#[test]
-fn test_queue_4_true_true() {
-    test_queue_helper(
-        4,
-        true,
-        true,
-        include_str!("sim/expected/queue_4_true_true.vcd"),
-        include_str!("sim/expected/queue_4_true_true.txt"),
-    );
-}

crates/fayalite/tests/sim/expected/array_rw.txt

@@ -424,8 +424,8 @@ Simulation {
         },
         small_slots: StatePart {
             value: [
-                16 (modified),
+                16,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -483,7 +483,7 @@ Simulation {
                 248,
                 252,
                 254,
-                255 (modified),
+                255,
             ],
         },
         sim_only_slots: StatePart {
@@ -1218,7 +1218,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xff,
             last_state: 0xff,
         },
@@ -1228,7 +1227,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(1),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x7f,
             last_state: 0x7f,
         },
@@ -1238,7 +1236,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x3f,
             last_state: 0x3f,
         },
@@ -1248,7 +1245,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x1f,
             last_state: 0x1f,
         },
@@ -1258,7 +1254,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(4),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x0f,
             last_state: 0x0f,
         },
@@ -1268,7 +1263,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x07,
             last_state: 0x07,
         },
@@ -1278,7 +1272,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(6),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x03,
             last_state: 0x03,
         },
@@ -1288,7 +1281,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(7),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x01,
             last_state: 0x01,
         },
@@ -1298,7 +1290,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(8),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -1308,7 +1299,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(9),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x80,
             last_state: 0x80,
         },
@@ -1318,7 +1308,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(10),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xc0,
             last_state: 0xc0,
         },
@@ -1328,7 +1317,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(11),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xe0,
             last_state: 0xe0,
         },
@@ -1338,7 +1326,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(12),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf0,
             last_state: 0xf0,
         },
@@ -1348,7 +1335,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(13),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf8,
             last_state: 0xf8,
         },
@@ -1358,7 +1344,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(14),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfc,
             last_state: 0xfc,
         },
@@ -1368,7 +1353,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(15),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfe,
             last_state: 0xfe,
         },
@@ -1378,7 +1362,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(16),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xff,
             last_state: 0xff,
         },
@@ -1388,7 +1371,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(17),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x7f,
             last_state: 0x7f,
         },
@@ -1398,7 +1380,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(18),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x3f,
             last_state: 0x3f,
         },
@@ -1408,7 +1389,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(19),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x1f,
             last_state: 0x1f,
         },
@@ -1418,7 +1398,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(20),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x0f,
             last_state: 0x0f,
         },
@@ -1428,7 +1407,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(21),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x07,
             last_state: 0x07,
         },
@@ -1438,7 +1416,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(22),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x03,
             last_state: 0x03,
         },
@@ -1448,7 +1425,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(23),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x01,
             last_state: 0x01,
         },
@@ -1458,7 +1434,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(24),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -1468,7 +1443,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(25),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x80,
             last_state: 0x80,
         },
@@ -1478,7 +1452,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(26),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xc0,
             last_state: 0xc0,
         },
@@ -1488,7 +1461,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(27),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xe0,
             last_state: 0xe0,
         },
@@ -1498,7 +1470,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(28),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf0,
             last_state: 0xf0,
         },
@@ -1508,7 +1479,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(29),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf8,
             last_state: 0xf8,
         },
@@ -1518,7 +1488,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(30),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfc,
             last_state: 0xfc,
         },
@@ -1528,7 +1497,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(31),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfe,
             last_state: 0xe1,
         },
@@ -1538,7 +1506,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(32),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -1548,7 +1515,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(33),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xff,
             last_state: 0xff,
         },
@@ -1558,7 +1524,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(34),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x10,
             last_state: 0x0f,
         },
@@ -1568,7 +1533,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(35),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0xe1,
         },
@@ -1577,7 +1541,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(36),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1587,7 +1550,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(37),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xff,
             last_state: 0xff,
         },
@@ -1597,7 +1559,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(38),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x7f,
             last_state: 0x7f,
         },
@@ -1607,7 +1568,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(39),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x3f,
             last_state: 0x3f,
         },
@@ -1617,7 +1577,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(40),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x1f,
             last_state: 0x1f,
         },
@@ -1627,7 +1586,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(41),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x0f,
             last_state: 0x0f,
         },
@@ -1637,7 +1595,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(42),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x07,
             last_state: 0x07,
         },
@@ -1647,7 +1604,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(43),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x03,
             last_state: 0x03,
         },
@@ -1657,7 +1613,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(44),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x01,
             last_state: 0x01,
         },
@@ -1667,7 +1622,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(45),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -1677,7 +1631,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(46),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x80,
             last_state: 0x80,
         },
@@ -1687,7 +1640,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(47),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xc0,
             last_state: 0xc0,
         },
@@ -1697,7 +1649,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(48),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xe0,
             last_state: 0xe0,
         },
@@ -1707,7 +1658,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(49),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf0,
             last_state: 0xf0,
         },
@@ -1717,7 +1667,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(50),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xf8,
             last_state: 0xf8,
         },
@@ -1727,7 +1676,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(51),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfc,
             last_state: 0xfc,
         },
@@ -1737,7 +1685,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(52),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xfe,
             last_state: 0xe1,
         },

crates/fayalite/tests/sim/expected/array_rw.vcd

@@ -1,283 +1,283 @@
 $timescale 1 ps $end
 $scope module array_rw $end
 $scope struct array_in $end
-$var wire 8 Yvfu^ \[0] $end
+$var wire 8 ! \[0] $end
-$var wire 8 |Cs`W \[1] $end
+$var wire 8 " \[1] $end
-$var wire 8 M!nsb \[2] $end
+$var wire 8 # \[2] $end
-$var wire 8 59L{w \[3] $end
+$var wire 8 $ \[3] $end
-$var wire 8 o2+|F \[4] $end
+$var wire 8 % \[4] $end
-$var wire 8 ikzV5 \[5] $end
+$var wire 8 & \[5] $end
-$var wire 8 [E$Z* \[6] $end
+$var wire 8 ' \[6] $end
-$var wire 8 ?"~01 \[7] $end
+$var wire 8 ( \[7] $end
-$var wire 8 /kghT \[8] $end
+$var wire 8 ) \[8] $end
-$var wire 8 +}(9) \[9] $end
+$var wire 8 * \[9] $end
-$var wire 8 iMP}= \[10] $end
+$var wire 8 + \[10] $end
-$var wire 8 2M0tL \[11] $end
+$var wire 8 , \[11] $end
-$var wire 8 :AjkA \[12] $end
+$var wire 8 - \[12] $end
-$var wire 8 VM_:8 \[13] $end
+$var wire 8 . \[13] $end
-$var wire 8 UveL2 \[14] $end
+$var wire 8 / \[14] $end
-$var wire 8 A)9Z6 \[15] $end
+$var wire 8 0 \[15] $end
 $upscope $end
 $scope struct array_out $end
-$var wire 8 2zdj1 \[0] $end
+$var wire 8 1 \[0] $end
-$var wire 8 =;m_[ \[1] $end
+$var wire 8 2 \[1] $end
-$var wire 8 @9Hd \[2] $end
+$var wire 8 3 \[2] $end
-$var wire 8 C:="| \[3] $end
+$var wire 8 4 \[3] $end
-$var wire 8 IDk7# \[4] $end
+$var wire 8 5 \[4] $end
-$var wire 8 i]E1i \[5] $end
+$var wire 8 6 \[5] $end
-$var wire 8 tK,M] \[6] $end
+$var wire 8 7 \[6] $end
-$var wire 8 tGp!\ \[7] $end
+$var wire 8 8 \[7] $end
-$var wire 8 ."qjK \[8] $end
+$var wire 8 9 \[8] $end
-$var wire 8 AUO:R \[9] $end
+$var wire 8 : \[9] $end
-$var wire 8 'kx`n \[10] $end
+$var wire 8 ; \[10] $end
-$var wire 8 U&(K\ \[11] $end
+$var wire 8 < \[11] $end
-$var wire 8 q<O41 \[12] $end
+$var wire 8 = \[12] $end
-$var wire 8 zvj)] \[13] $end
+$var wire 8 > \[13] $end
-$var wire 8 >0H<( \[14] $end
+$var wire 8 ? \[14] $end
-$var wire 8 ARhXJ \[15] $end
+$var wire 8 @ \[15] $end
 $upscope $end
-$var wire 8 -n:7@ read_index $end
+$var wire 8 A read_index $end
-$var wire 8 >h<=Z read_data $end
+$var wire 8 B read_data $end
-$var wire 8 [xld3 write_index $end
+$var wire 8 C write_index $end
-$var wire 8 J+DYh write_data $end
+$var wire 8 D write_data $end
-$var wire 1 z,@WW write_en $end
+$var wire 1 E write_en $end
 $scope struct array_wire $end
-$var wire 8 B{KJS \[0] $end
+$var wire 8 F \[0] $end
-$var wire 8 V'K*& \[1] $end
+$var wire 8 G \[1] $end
-$var wire 8 4zI$O \[2] $end
+$var wire 8 H \[2] $end
-$var wire 8 %TTk[ \[3] $end
+$var wire 8 I \[3] $end
-$var wire 8 IgSeY \[4] $end
+$var wire 8 J \[4] $end
-$var wire 8 &&1T" \[5] $end
+$var wire 8 K \[5] $end
-$var wire 8 5)-l\ \[6] $end
+$var wire 8 L \[6] $end
-$var wire 8 0RsLb \[7] $end
+$var wire 8 M \[7] $end
-$var wire 8 T>:}D \[8] $end
+$var wire 8 N \[8] $end
-$var wire 8 DPpZ* \[9] $end
+$var wire 8 O \[9] $end
-$var wire 8 %E(nf \[10] $end
+$var wire 8 P \[10] $end
-$var wire 8 2'pba \[11] $end
+$var wire 8 Q \[11] $end
-$var wire 8 e/c1: \[12] $end
+$var wire 8 R \[12] $end
-$var wire 8 ;w.C7 \[13] $end
+$var wire 8 S \[13] $end
-$var wire 8 fwdfu \[14] $end
+$var wire 8 T \[14] $end
-$var wire 8 *R\vx \[15] $end
+$var wire 8 U \[15] $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-b11111111 Yvfu^
+b11111111 !
-b1111111 |Cs`W
+b1111111 "
-b111111 M!nsb
+b111111 #
-b11111 59L{w
+b11111 $
-b1111 o2+|F
+b1111 %
-b111 ikzV5
+b111 &
-b11 [E$Z*
+b11 '
-b1 ?"~01
+b1 (
-b0 /kghT
+b0 )
-b10000000 +}(9)
+b10000000 *
-b11000000 iMP}=
+b11000000 +
-b11100000 2M0tL
+b11100000 ,
-b11110000 :AjkA
+b11110000 -
-b11111000 VM_:8
+b11111000 .
-b11111100 UveL2
+b11111100 /
-b11111110 A)9Z6
+b11111110 0
-b11111111 2zdj1
+b11111111 1
-b1111111 =;m_[
+b1111111 2
-b111111 @9Hd
+b111111 3
-b11111 C:="|
+b11111 4
-b1111 IDk7#
+b1111 5
-b111 i]E1i
+b111 6
-b11 tK,M]
+b11 7
-b1 tGp!\
+b1 8
-b0 ."qjK
+b0 9
-b10000000 AUO:R
+b10000000 :
-b11000000 'kx`n
+b11000000 ;
-b11100000 U&(K\
+b11100000 <
-b11110000 q<O41
+b11110000 =
-b11111000 zvj)]
+b11111000 >
-b11111100 >0H<(
+b11111100 ?
-b11111110 ARhXJ
+b11111110 @
-b0 -n:7@
+b0 A
-b11111111 >h<=Z
+b11111111 B
-b0 [xld3
+b0 C
-b0 J+DYh
+b0 D
-0z,@WW
+0E
-b11111111 B{KJS
+b11111111 F
-b1111111 V'K*&
+b1111111 G
-b111111 4zI$O
+b111111 H
-b11111 %TTk[
+b11111 I
-b1111 IgSeY
+b1111 J
-b111 &&1T"
+b111 K
-b11 5)-l\
+b11 L
-b1 0RsLb
+b1 M
-b0 T>:}D
+b0 N
-b10000000 DPpZ*
+b10000000 O
-b11000000 %E(nf
+b11000000 P
-b11100000 2'pba
+b11100000 Q
-b11110000 e/c1:
+b11110000 R
-b11111000 ;w.C7
+b11111000 S
-b11111100 fwdfu
+b11111100 T
-b11111110 *R\vx
+b11111110 U
 $end
 #1000000
-b1 -n:7@
+b1 A
-b1111111 >h<=Z
+b1111111 B
 #2000000
-b10 -n:7@
+b10 A
-b111111 >h<=Z
+b111111 B
 #3000000
-b11 -n:7@
+b11 A
-b11111 >h<=Z
+b11111 B
 #4000000
-b100 -n:7@
+b100 A
-b1111 >h<=Z
+b1111 B
 #5000000
-b101 -n:7@
+b101 A
-b111 >h<=Z
+b111 B
 #6000000
-b110 -n:7@
+b110 A
-b11 >h<=Z
+b11 B
 #7000000
-b111 -n:7@
+b111 A
-b1 >h<=Z
+b1 B
 #8000000
-b1000 -n:7@
+b1000 A
-b0 >h<=Z
+b0 B
 #9000000
-b1001 -n:7@
+b1001 A
-b10000000 >h<=Z
+b10000000 B
 #10000000
-b1010 -n:7@
+b1010 A
-b11000000 >h<=Z
+b11000000 B
 #11000000
-b1011 -n:7@
+b1011 A
-b11100000 >h<=Z
+b11100000 B
 #12000000
-b1100 -n:7@
+b1100 A
-b11110000 >h<=Z
+b11110000 B
 #13000000
-b1101 -n:7@
+b1101 A
-b11111000 >h<=Z
+b11111000 B
 #14000000
-b1110 -n:7@
+b1110 A
-b11111100 >h<=Z
+b11111100 B
 #15000000
-b1111 -n:7@
+b1111 A
-b11111110 >h<=Z
+b11111110 B
 #16000000
-b10000 -n:7@
+b10000 A
-b0 >h<=Z
+b0 B
 #17000000
-b0 2zdj1
+b0 1
-b0 -n:7@
+b0 A
-1z,@WW
+1E
-b0 B{KJS
+b0 F
 #18000000
-b11111111 2zdj1
+b11111111 1
-b1 =;m_[
+b1 2
-b11111111 >h<=Z
+b11111111 B
-b1 [xld3
+b1 C
-b1 J+DYh
+b1 D
-b11111111 B{KJS
+b11111111 F
-b1 V'K*&
+b1 G
 #19000000
-b1111111 =;m_[
+b1111111 2
-b100 @9Hd
+b100 3
-b10 [xld3
+b10 C
-b100 J+DYh
+b100 D
-b1111111 V'K*&
+b1111111 G
-b100 4zI$O
+b100 H
 #20000000
-b111111 @9Hd
+b111111 3
-b1001 C:="|
+b1001 4
-b11 [xld3
+b11 C
-b1001 J+DYh
+b1001 D
-b111111 4zI$O
+b111111 H
-b1001 %TTk[
+b1001 I
 #21000000
-b11111 C:="|
+b11111 4
-b10000 IDk7#
+b10000 5
-b100 [xld3
+b100 C
-b10000 J+DYh
+b10000 D
-b11111 %TTk[
+b11111 I
-b10000 IgSeY
+b10000 J
 #22000000
-b1111 IDk7#
+b1111 5
-b11001 i]E1i
+b11001 6
-b101 [xld3
+b101 C
-b11001 J+DYh
+b11001 D
-b1111 IgSeY
+b1111 J
-b11001 &&1T"
+b11001 K
 #23000000
-b111 i]E1i
+b111 6
-b100100 tK,M]
+b100100 7
-b110 [xld3
+b110 C
-b100100 J+DYh
+b100100 D
-b111 &&1T"
+b111 K
-b100100 5)-l\
+b100100 L
 #24000000
-b11 tK,M]
+b11 7
-b110001 tGp!\
+b110001 8
-b111 [xld3
+b111 C
-b110001 J+DYh
+b110001 D
-b11 5)-l\
+b11 L
-b110001 0RsLb
+b110001 M
 #25000000
-b1 tGp!\
+b1 8
-b1000000 ."qjK
+b1000000 9
-b1000 [xld3
+b1000 C
-b1000000 J+DYh
+b1000000 D
-b1 0RsLb
+b1 M
-b1000000 T>:}D
+b1000000 N
 #26000000
-b0 ."qjK
+b0 9
-b1010001 AUO:R
+b1010001 :
-b1001 [xld3
+b1001 C
-b1010001 J+DYh
+b1010001 D
-b0 T>:}D
+b0 N
-b1010001 DPpZ*
+b1010001 O
 #27000000
-b10000000 AUO:R
+b10000000 :
-b1100100 'kx`n
+b1100100 ;
-b1010 [xld3
+b1010 C
-b1100100 J+DYh
+b1100100 D
-b10000000 DPpZ*
+b10000000 O
-b1100100 %E(nf
+b1100100 P
 #28000000
-b11000000 'kx`n
+b11000000 ;
-b1111001 U&(K\
+b1111001 <
-b1011 [xld3
+b1011 C
-b1111001 J+DYh
+b1111001 D
-b11000000 %E(nf
+b11000000 P
-b1111001 2'pba
+b1111001 Q
 #29000000
-b11100000 U&(K\
+b11100000 <
-b10010000 q<O41
+b10010000 =
-b1100 [xld3
+b1100 C
-b10010000 J+DYh
+b10010000 D
-b11100000 2'pba
+b11100000 Q
-b10010000 e/c1:
+b10010000 R
 #30000000
-b11110000 q<O41
+b11110000 =
-b10101001 zvj)]
+b10101001 >
-b1101 [xld3
+b1101 C
-b10101001 J+DYh
+b10101001 D
-b11110000 e/c1:
+b11110000 R
-b10101001 ;w.C7
+b10101001 S
 #31000000
-b11111000 zvj)]
+b11111000 >
-b11000100 >0H<(
+b11000100 ?
-b1110 [xld3
+b1110 C
-b11000100 J+DYh
+b11000100 D
-b11111000 ;w.C7
+b11111000 S
-b11000100 fwdfu
+b11000100 T
 #32000000
-b11111100 >0H<(
+b11111100 ?
-b11100001 ARhXJ
+b11100001 @
-b1111 [xld3
+b1111 C
-b11100001 J+DYh
+b11100001 D
-b11111100 fwdfu
+b11111100 T
-b11100001 *R\vx
+b11100001 U
 #33000000
-b11111110 ARhXJ
+b11111110 @
-b10000 [xld3
+b10000 C
-b0 J+DYh
+b0 D
-b11111110 *R\vx
+b11111110 U
 #34000000

crates/fayalite/tests/sim/expected/conditional_assignment_last.txt

@@ -86,8 +86,8 @@ Simulation {
             value: [
                 1,
                 0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
             ],
         },
         sim_only_slots: StatePart {
@@ -155,7 +155,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x0,
         },
@@ -164,7 +163,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },

crates/fayalite/tests/sim/expected/conditional_assignment_last.vcd

@@ -1,14 +1,14 @@
 $timescale 1 ps $end
 $scope module conditional_assignment_last $end
-$var wire 1 xt~(W i $end
+$var wire 1 ! i $end
-$var wire 1 6:7im w $end
+$var wire 1 " w $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-0xt~(W
+0!
-16:7im
+1"
 $end
 #1000000
-1xt~(W
+1!
-06:7im
+0"
 #2000000

crates/fayalite/tests/sim/expected/connect_const.txt

@@ -63,7 +63,7 @@ Simulation {
         big_slots: StatePart {
             value: [
                 5,
-                5 (modified),
+                5,
             ],
         },
         sim_only_slots: StatePart {
@@ -124,7 +124,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x05,
             last_state: 0x05,
         },

crates/fayalite/tests/sim/expected/connect_const_reset.txt

@@ -90,9 +90,9 @@ Simulation {
             value: [
                 1,
                 1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
             ],
         },
         sim_only_slots: StatePart {
@@ -175,7 +175,6 @@ Simulation {
             kind: BigAsyncReset {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -184,7 +183,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },

crates/fayalite/tests/sim/expected/connect_const_reset.vcd

@@ -1,11 +1,11 @@
 $timescale 1 ps $end
 $scope module connect_const_reset $end
-$var wire 1 8ke|= reset_out $end
+$var wire 1 ! reset_out $end
-$var wire 1 {"c@= bit_out $end
+$var wire 1 " bit_out $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-18ke|=
+1!
-1{"c@=
+1"
 $end
 #1000000

crates/fayalite/tests/sim/expected/counter_async.txt

@@ -123,72 +123,68 @@ Simulation {
                     dest: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(5), // (0x3) SlotDebugData { name: "", ty: UInt<4> },
                 },
-                8: Copy {
-                    dest: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
-                    src: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
-                },
                 // at: module-XXXXXXXXXX.rs:1:1
-                9: Add {
+                8: Add {
                     dest: StatePartIndex<BigSlots>(8), // (0x4) SlotDebugData { name: "", ty: UInt<5> },
                     lhs: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     rhs: StatePartIndex<BigSlots>(7), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
                 },
-                10: CastToUInt {
+                9: CastToUInt {
                     dest: StatePartIndex<BigSlots>(9), // (0x4) SlotDebugData { name: "", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(8), // (0x4) SlotDebugData { name: "", ty: UInt<5> },
                     dest_width: 4,
                 },
                 // at: module-XXXXXXXXXX.rs:4:1
-                11: Copy {
+                10: Copy {
                     dest: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(9), // (0x4) SlotDebugData { name: "", ty: UInt<4> },
                 },
                 // at: module-XXXXXXXXXX.rs:6:1
-                12: Copy {
+                11: Copy {
                     dest: StatePartIndex<BigSlots>(2), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                 },
                 // at: module-XXXXXXXXXX.rs:3:1
-                13: BranchIfSmallNonZero {
+                12: BranchIfSmallNonZero {
-                    target: 17,
+                    target: 16,
                     value: StatePartIndex<SmallSlots>(3), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                14: BranchIfSmallZero {
+                13: BranchIfSmallZero {
-                    target: 18,
+                    target: 17,
                     value: StatePartIndex<SmallSlots>(1), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                15: Copy {
+                14: Copy {
                     dest: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
                 },
-                16: Branch {
+                15: Branch {
-                    target: 18,
+                    target: 17,
                 },
-                17: Copy {
+                16: Copy {
                     dest: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(5), // (0x3) SlotDebugData { name: "", ty: UInt<4> },
                 },
-                18: XorSmallImmediate {
+                17: XorSmallImmediate {
                     dest: StatePartIndex<SmallSlots>(0), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                     lhs: StatePartIndex<SmallSlots>(2), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     rhs: 0x1,
                 },
                 // at: module-XXXXXXXXXX.rs:1:1
-                19: Return,
+                18: Return,
             ],
             ..
         },
-        pc: 19,
+        pc: 18,
         memory_write_log: [],
         memories: StatePart {
             value: [],
         },
         small_slots: StatePart {
             value: [
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -197,12 +193,12 @@ Simulation {
                 0,
                 3,
                 3,
-                4 (modified),
+                4,
-                3 (modified),
+                3,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                4 (modified),
+                4,
-                4 (modified),
+                4,
             ],
         },
         sim_only_slots: StatePart {
@@ -332,7 +328,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x0,
         },
@@ -341,7 +336,6 @@ Simulation {
             kind: BigAsyncReset {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -351,7 +345,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x3,
             last_state: 0x2,
         },
@@ -361,7 +354,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x3,
             last_state: 0x2,
         },

crates/fayalite/tests/sim/expected/counter_async.vcd

@@ -1,217 +1,217 @@
 $timescale 1 ps $end
 $scope module counter $end
 $scope struct cd $end
-$var wire 1 `[J;" clk $end
+$var wire 1 ! clk $end
-$var wire 1 4pZx7 rst $end
+$var wire 1 " rst $end
 $upscope $end
-$var wire 4 rPs;{ count $end
+$var wire 4 # count $end
-$var reg 4 6_+(g count_reg $end
+$var reg 4 $ count_reg $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-0`[J;"
+0!
-04pZx7
+0"
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 $end
 #500000
-14pZx7
+1"
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
 #1000000
-1`[J;"
+1!
 #1500000
-04pZx7
+0"
 #2000000
-0`[J;"
+0!
 #3000000
-1`[J;"
+1!
-b100 rPs;{
+b100 #
-b100 6_+(g
+b100 $
 #4000000
-0`[J;"
+0!
 #5000000
-1`[J;"
+1!
-b101 rPs;{
+b101 #
-b101 6_+(g
+b101 $
 #6000000
-0`[J;"
+0!
 #7000000
-1`[J;"
+1!
-b110 rPs;{
+b110 #
-b110 6_+(g
+b110 $
 #8000000
-0`[J;"
+0!
 #9000000
-1`[J;"
+1!
-b111 rPs;{
+b111 #
-b111 6_+(g
+b111 $
 #10000000
-0`[J;"
+0!
 #11000000
-1`[J;"
+1!
-b1000 rPs;{
+b1000 #
-b1000 6_+(g
+b1000 $
 #12000000
-0`[J;"
+0!
 #13000000
-1`[J;"
+1!
-b1001 rPs;{
+b1001 #
-b1001 6_+(g
+b1001 $
 #14000000
-0`[J;"
+0!
 #15000000
-1`[J;"
+1!
-b1010 rPs;{
+b1010 #
-b1010 6_+(g
+b1010 $
 #16000000
-0`[J;"
+0!
 #17000000
-1`[J;"
+1!
-b1011 rPs;{
+b1011 #
-b1011 6_+(g
+b1011 $
 #18000000
-0`[J;"
+0!
 #19000000
-1`[J;"
+1!
-b1100 rPs;{
+b1100 #
-b1100 6_+(g
+b1100 $
 #20000000
-0`[J;"
+0!
 #21000000
-1`[J;"
+1!
-b1101 rPs;{
+b1101 #
-b1101 6_+(g
+b1101 $
 #22000000
-0`[J;"
+0!
 #23000000
-1`[J;"
+1!
-b1110 rPs;{
+b1110 #
-b1110 6_+(g
+b1110 $
 #24000000
-0`[J;"
+0!
 #25000000
-1`[J;"
+1!
-b1111 rPs;{
+b1111 #
-b1111 6_+(g
+b1111 $
 #26000000
-0`[J;"
+0!
 #27000000
-1`[J;"
+1!
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 #28000000
-0`[J;"
+0!
 #29000000
-1`[J;"
+1!
-b1 rPs;{
+b1 #
-b1 6_+(g
+b1 $
 #30000000
-0`[J;"
+0!
 #31000000
-1`[J;"
+1!
-b10 rPs;{
+b10 #
-b10 6_+(g
+b10 $
 #32000000
-0`[J;"
+0!
 #33000000
-1`[J;"
+1!
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
 #34000000
-0`[J;"
+0!
 #35000000
-1`[J;"
+1!
-b100 rPs;{
+b100 #
-b100 6_+(g
+b100 $
 #36000000
-0`[J;"
+0!
 #37000000
-1`[J;"
+1!
-b101 rPs;{
+b101 #
-b101 6_+(g
+b101 $
 #38000000
-0`[J;"
+0!
 #39000000
-1`[J;"
+1!
-b110 rPs;{
+b110 #
-b110 6_+(g
+b110 $
 #40000000
-0`[J;"
+0!
 #41000000
-1`[J;"
+1!
-b111 rPs;{
+b111 #
-b111 6_+(g
+b111 $
 #42000000
-0`[J;"
+0!
 #43000000
-1`[J;"
+1!
-b1000 rPs;{
+b1000 #
-b1000 6_+(g
+b1000 $
 #44000000
-0`[J;"
+0!
 #45000000
-1`[J;"
+1!
-b1001 rPs;{
+b1001 #
-b1001 6_+(g
+b1001 $
 #46000000
-0`[J;"
+0!
 #47000000
-1`[J;"
+1!
-b1010 rPs;{
+b1010 #
-b1010 6_+(g
+b1010 $
 #48000000
-0`[J;"
+0!
 #49000000
-1`[J;"
+1!
-b1011 rPs;{
+b1011 #
-b1011 6_+(g
+b1011 $
 #50000000
-0`[J;"
+0!
 #51000000
-1`[J;"
+1!
-b1100 rPs;{
+b1100 #
-b1100 6_+(g
+b1100 $
 #52000000
-0`[J;"
+0!
 #53000000
-1`[J;"
+1!
-b1101 rPs;{
+b1101 #
-b1101 6_+(g
+b1101 $
 #54000000
-0`[J;"
+0!
 #55000000
-1`[J;"
+1!
-b1110 rPs;{
+b1110 #
-b1110 6_+(g
+b1110 $
 #56000000
-0`[J;"
+0!
 #57000000
-1`[J;"
+1!
-b1111 rPs;{
+b1111 #
-b1111 6_+(g
+b1111 $
 #58000000
-0`[J;"
+0!
 #59000000
-1`[J;"
+1!
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 #60000000
-0`[J;"
+0!
 #61000000
-1`[J;"
+1!
-b1 rPs;{
+b1 #
-b1 6_+(g
+b1 $
 #62000000
-0`[J;"
+0!
 #63000000
-1`[J;"
+1!
-b10 rPs;{
+b10 #
-b10 6_+(g
+b10 $
 #64000000
-0`[J;"
+0!
 #65000000
-1`[J;"
+1!
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
 #66000000

crates/fayalite/tests/sim/expected/counter_sync.txt

@@ -102,75 +102,71 @@ Simulation {
                     src: StatePartIndex<BigSlots>(7), // (0x4) SlotDebugData { name: "", ty: UInt<5> },
                     dest_width: 4,
                 },
+                // at: module-XXXXXXXXXX.rs:4:1
+                4: Copy {
+                    dest: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
+                    src: StatePartIndex<BigSlots>(8), // (0x4) SlotDebugData { name: "", ty: UInt<4> },
+                },
                 // at: module-XXXXXXXXXX.rs:3:1
-                4: IsNonZeroDestIsSmall {
+                5: IsNonZeroDestIsSmall {
                     dest: StatePartIndex<SmallSlots>(3), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                     src: StatePartIndex<BigSlots>(1), // (0x0) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::cd.rst", ty: SyncReset },
                 },
-                5: IsNonZeroDestIsSmall {
+                6: IsNonZeroDestIsSmall {
                     dest: StatePartIndex<SmallSlots>(2), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     src: StatePartIndex<BigSlots>(0), // (0x1) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::cd.clk", ty: Clock },
                 },
-                6: AndSmall {
+                7: AndSmall {
                     dest: StatePartIndex<SmallSlots>(1), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                     lhs: StatePartIndex<SmallSlots>(2), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     rhs: StatePartIndex<SmallSlots>(0), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                7: Copy {
-                    dest: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
-                    src: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
-                },
-                // at: module-XXXXXXXXXX.rs:4:1
-                8: Copy {
-                    dest: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
-                    src: StatePartIndex<BigSlots>(8), // (0x4) SlotDebugData { name: "", ty: UInt<4> },
-                },
                 // at: module-XXXXXXXXXX.rs:1:1
-                9: Const {
+                8: Const {
                     dest: StatePartIndex<BigSlots>(5), // (0x3) SlotDebugData { name: "", ty: UInt<4> },
                     value: 0x3,
                 },
                 // at: module-XXXXXXXXXX.rs:3:1
-                10: BranchIfSmallZero {
+                9: BranchIfSmallZero {
-                    target: 15,
+                    target: 14,
                     value: StatePartIndex<SmallSlots>(1), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                11: BranchIfSmallNonZero {
+                10: BranchIfSmallNonZero {
-                    target: 14,
+                    target: 13,
                     value: StatePartIndex<SmallSlots>(3), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                12: Copy {
+                11: Copy {
                     dest: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(4), // (0x4) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg$next", ty: UInt<4> },
                 },
-                13: Branch {
+                12: Branch {
-                    target: 15,
+                    target: 14,
                 },
-                14: Copy {
+                13: Copy {
                     dest: StatePartIndex<BigSlots>(3), // (0x3) SlotDebugData { name: "InstantiatedModule(counter: counter).counter::count_reg", ty: UInt<4> },
                     src: StatePartIndex<BigSlots>(5), // (0x3) SlotDebugData { name: "", ty: UInt<4> },
                 },
-                15: XorSmallImmediate {
+                14: XorSmallImmediate {
                     dest: StatePartIndex<SmallSlots>(0), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                     lhs: StatePartIndex<SmallSlots>(2), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     rhs: 0x1,
                 },
                 // at: module-XXXXXXXXXX.rs:1:1
-                16: Return,
+                15: Return,
             ],
             ..
         },
-        pc: 16,
+        pc: 15,
         memory_write_log: [],
         memories: StatePart {
             value: [],
         },
         small_slots: StatePart {
             value: [
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -179,11 +175,11 @@ Simulation {
                 0,
                 3,
                 3,
-                4 (modified),
+                4,
-                3 (modified),
+                3,
-                1 (modified),
+                1,
-                4 (modified),
+                4,
-                4 (modified),
+                4,
             ],
         },
         sim_only_slots: StatePart {
@@ -313,7 +309,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x0,
         },
@@ -322,7 +317,6 @@ Simulation {
             kind: BigSyncReset {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: false,
             state: 0x0,
             last_state: 0x0,
         },
@@ -332,7 +326,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x3,
             last_state: 0x2,
         },
@@ -342,7 +335,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x3,
             last_state: 0x2,
         },

crates/fayalite/tests/sim/expected/counter_sync.vcd

@@ -1,214 +1,214 @@
 $timescale 1 ps $end
 $scope module counter $end
 $scope struct cd $end
-$var wire 1 `[J;" clk $end
+$var wire 1 ! clk $end
-$var wire 1 4pZx7 rst $end
+$var wire 1 " rst $end
 $upscope $end
-$var wire 4 rPs;{ count $end
+$var wire 4 # count $end
-$var reg 4 6_+(g count_reg $end
+$var reg 4 $ count_reg $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-0`[J;"
+0!
-14pZx7
+1"
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 $end
 #1000000
-1`[J;"
+1!
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
-04pZx7
+0"
 #2000000
-0`[J;"
+0!
 #3000000
-1`[J;"
+1!
-b100 rPs;{
+b100 #
-b100 6_+(g
+b100 $
 #4000000
-0`[J;"
+0!
 #5000000
-1`[J;"
+1!
-b101 rPs;{
+b101 #
-b101 6_+(g
+b101 $
 #6000000
-0`[J;"
+0!
 #7000000
-1`[J;"
+1!
-b110 rPs;{
+b110 #
-b110 6_+(g
+b110 $
 #8000000
-0`[J;"
+0!
 #9000000
-1`[J;"
+1!
-b111 rPs;{
+b111 #
-b111 6_+(g
+b111 $
 #10000000
-0`[J;"
+0!
 #11000000
-1`[J;"
+1!
-b1000 rPs;{
+b1000 #
-b1000 6_+(g
+b1000 $
 #12000000
-0`[J;"
+0!
 #13000000
-1`[J;"
+1!
-b1001 rPs;{
+b1001 #
-b1001 6_+(g
+b1001 $
 #14000000
-0`[J;"
+0!
 #15000000
-1`[J;"
+1!
-b1010 rPs;{
+b1010 #
-b1010 6_+(g
+b1010 $
 #16000000
-0`[J;"
+0!
 #17000000
-1`[J;"
+1!
-b1011 rPs;{
+b1011 #
-b1011 6_+(g
+b1011 $
 #18000000
-0`[J;"
+0!
 #19000000
-1`[J;"
+1!
-b1100 rPs;{
+b1100 #
-b1100 6_+(g
+b1100 $
 #20000000
-0`[J;"
+0!
 #21000000
-1`[J;"
+1!
-b1101 rPs;{
+b1101 #
-b1101 6_+(g
+b1101 $
 #22000000
-0`[J;"
+0!
 #23000000
-1`[J;"
+1!
-b1110 rPs;{
+b1110 #
-b1110 6_+(g
+b1110 $
 #24000000
-0`[J;"
+0!
 #25000000
-1`[J;"
+1!
-b1111 rPs;{
+b1111 #
-b1111 6_+(g
+b1111 $
 #26000000
-0`[J;"
+0!
 #27000000
-1`[J;"
+1!
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 #28000000
-0`[J;"
+0!
 #29000000
-1`[J;"
+1!
-b1 rPs;{
+b1 #
-b1 6_+(g
+b1 $
 #30000000
-0`[J;"
+0!
 #31000000
-1`[J;"
+1!
-b10 rPs;{
+b10 #
-b10 6_+(g
+b10 $
 #32000000
-0`[J;"
+0!
 #33000000
-1`[J;"
+1!
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
 #34000000
-0`[J;"
+0!
 #35000000
-1`[J;"
+1!
-b100 rPs;{
+b100 #
-b100 6_+(g
+b100 $
 #36000000
-0`[J;"
+0!
 #37000000
-1`[J;"
+1!
-b101 rPs;{
+b101 #
-b101 6_+(g
+b101 $
 #38000000
-0`[J;"
+0!
 #39000000
-1`[J;"
+1!
-b110 rPs;{
+b110 #
-b110 6_+(g
+b110 $
 #40000000
-0`[J;"
+0!
 #41000000
-1`[J;"
+1!
-b111 rPs;{
+b111 #
-b111 6_+(g
+b111 $
 #42000000
-0`[J;"
+0!
 #43000000
-1`[J;"
+1!
-b1000 rPs;{
+b1000 #
-b1000 6_+(g
+b1000 $
 #44000000
-0`[J;"
+0!
 #45000000
-1`[J;"
+1!
-b1001 rPs;{
+b1001 #
-b1001 6_+(g
+b1001 $
 #46000000
-0`[J;"
+0!
 #47000000
-1`[J;"
+1!
-b1010 rPs;{
+b1010 #
-b1010 6_+(g
+b1010 $
 #48000000
-0`[J;"
+0!
 #49000000
-1`[J;"
+1!
-b1011 rPs;{
+b1011 #
-b1011 6_+(g
+b1011 $
 #50000000
-0`[J;"
+0!
 #51000000
-1`[J;"
+1!
-b1100 rPs;{
+b1100 #
-b1100 6_+(g
+b1100 $
 #52000000
-0`[J;"
+0!
 #53000000
-1`[J;"
+1!
-b1101 rPs;{
+b1101 #
-b1101 6_+(g
+b1101 $
 #54000000
-0`[J;"
+0!
 #55000000
-1`[J;"
+1!
-b1110 rPs;{
+b1110 #
-b1110 6_+(g
+b1110 $
 #56000000
-0`[J;"
+0!
 #57000000
-1`[J;"
+1!
-b1111 rPs;{
+b1111 #
-b1111 6_+(g
+b1111 $
 #58000000
-0`[J;"
+0!
 #59000000
-1`[J;"
+1!
-b0 rPs;{
+b0 #
-b0 6_+(g
+b0 $
 #60000000
-0`[J;"
+0!
 #61000000
-1`[J;"
+1!
-b1 rPs;{
+b1 #
-b1 6_+(g
+b1 $
 #62000000
-0`[J;"
+0!
 #63000000
-1`[J;"
+1!
-b10 rPs;{
+b10 #
-b10 6_+(g
+b10 $
 #64000000
-0`[J;"
+0!
 #65000000
-1`[J;"
+1!
-b11 rPs;{
+b11 #
-b11 6_+(g
+b11 $
 #66000000

crates/fayalite/tests/sim/expected/duplicate_names.txt

@@ -81,9 +81,9 @@ Simulation {
         big_slots: StatePart {
             value: [
                 5,
-                5 (modified),
+                5,
+                6,
                 6,
-                6 (modified),
             ],
         },
         sim_only_slots: StatePart {
@@ -137,7 +137,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x05,
             last_state: 0x05,
         },
@@ -147,7 +146,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x06,
             last_state: 0x06,
         },

crates/fayalite/tests/sim/expected/duplicate_names.vcd

@@ -1,11 +1,11 @@
 $timescale 1 ps $end
 $scope module duplicate_names $end
-$var wire 8 7[_7. w $end
+$var wire 8 ! w $end
-$var wire 8 7[_7." w_2 $end
+$var wire 8 " w_2 $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-b101 7[_7.
+b101 !
-b110 7[_7."
+b110 "
 $end
 #1000000

crates/fayalite/tests/sim/expected/enums.txt

@@ -1012,177 +1012,173 @@ Simulation {
                     lhs: StatePartIndex<SmallSlots>(4), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     rhs: StatePartIndex<SmallSlots>(2), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                99: Copy {
-                    dest: StatePartIndex<BigSlots>(24), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg$next", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
-                    src: StatePartIndex<BigSlots>(23), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
-                },
                 // at: module-XXXXXXXXXX.rs:1:1
-                100: Const {
+                99: Const {
                     dest: StatePartIndex<BigSlots>(25), // (0x0) SlotDebugData { name: "", ty: UInt<6> },
                     value: 0x0,
                 },
-                101: Copy {
+                100: Copy {
                     dest: StatePartIndex<BigSlots>(26), // (0x0) SlotDebugData { name: "", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(25), // (0x0) SlotDebugData { name: "", ty: UInt<6> },
                 },
                 // at: module-XXXXXXXXXX.rs:12:1
-                102: BranchIfZero {
+                101: BranchIfZero {
-                    target: 110,
+                    target: 109,
                     value: StatePartIndex<BigSlots>(2), // (0x1) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::en", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:13:1
-                103: BranchIfZero {
+                102: BranchIfZero {
-                    target: 105,
+                    target: 104,
                     value: StatePartIndex<BigSlots>(46), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:14:1
-                104: Copy {
+                103: Copy {
                     dest: StatePartIndex<BigSlots>(24), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg$next", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(26), // (0x0) SlotDebugData { name: "", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                 },
                 // at: module-XXXXXXXXXX.rs:13:1
-                105: BranchIfNonZero {
+                104: BranchIfNonZero {
-                    target: 110,
+                    target: 109,
                     value: StatePartIndex<BigSlots>(46), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:15:1
-                106: BranchIfZero {
+                105: BranchIfZero {
-                    target: 108,
+                    target: 107,
                     value: StatePartIndex<BigSlots>(48), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:16:1
-                107: Copy {
+                106: Copy {
                     dest: StatePartIndex<BigSlots>(24), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg$next", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(65), // (0xd) SlotDebugData { name: "", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                 },
                 // at: module-XXXXXXXXXX.rs:15:1
-                108: BranchIfNonZero {
+                107: BranchIfNonZero {
-                    target: 110,
+                    target: 109,
                     value: StatePartIndex<BigSlots>(48), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:17:1
-                109: Copy {
+                108: Copy {
                     dest: StatePartIndex<BigSlots>(24), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg$next", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(87), // (0x3e) SlotDebugData { name: "", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                 },
                 // at: module-XXXXXXXXXX.rs:10:1
-                110: Copy {
+                109: Copy {
                     dest: StatePartIndex<BigSlots>(15), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b2_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                     src: StatePartIndex<BigSlots>(7), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                 },
                 // at: module-XXXXXXXXXX.rs:1:1
-                111: Copy {
+                110: Copy {
                     dest: StatePartIndex<BigSlots>(18), // (0x0) SlotDebugData { name: "", ty: UInt<3> },
                     src: StatePartIndex<BigSlots>(15), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b2_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                 },
-                112: SliceInt {
+                111: SliceInt {
                     dest: StatePartIndex<BigSlots>(19), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     src: StatePartIndex<BigSlots>(18), // (0x0) SlotDebugData { name: "", ty: UInt<3> },
                     start: 1,
                     len: 2,
                 },
-                113: SliceInt {
+                112: SliceInt {
                     dest: StatePartIndex<BigSlots>(20), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(19), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     start: 0,
                     len: 1,
                 },
-                114: SliceInt {
+                113: SliceInt {
                     dest: StatePartIndex<BigSlots>(21), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(19), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     start: 1,
                     len: 1,
                 },
-                115: Copy {
+                114: Copy {
                     dest: StatePartIndex<BigSlots>(22), // (0x0) SlotDebugData { name: "", ty: Bool },
                     src: StatePartIndex<BigSlots>(21), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                 },
-                116: Copy {
+                115: Copy {
                     dest: StatePartIndex<BigSlots>(16), // (0x0) SlotDebugData { name: ".0", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(20), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                 },
-                117: Copy {
+                116: Copy {
                     dest: StatePartIndex<BigSlots>(17), // (0x0) SlotDebugData { name: ".1", ty: Bool },
                     src: StatePartIndex<BigSlots>(22), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:9:1
-                118: AndBigWithSmallImmediate {
+                117: AndBigWithSmallImmediate {
                     dest: StatePartIndex<SmallSlots>(1), // (0x0 0) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome} },
                     lhs: StatePartIndex<BigSlots>(15), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b2_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                     rhs: 0x1,
                 },
                 // at: module-XXXXXXXXXX.rs:1:1
-                119: Copy {
+                118: Copy {
                     dest: StatePartIndex<BigSlots>(10), // (0x0) SlotDebugData { name: "", ty: UInt<3> },
                     src: StatePartIndex<BigSlots>(7), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                 },
-                120: SliceInt {
+                119: SliceInt {
                     dest: StatePartIndex<BigSlots>(11), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     src: StatePartIndex<BigSlots>(10), // (0x0) SlotDebugData { name: "", ty: UInt<3> },
                     start: 1,
                     len: 2,
                 },
-                121: SliceInt {
+                120: SliceInt {
                     dest: StatePartIndex<BigSlots>(12), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(11), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     start: 0,
                     len: 1,
                 },
-                122: SliceInt {
+                121: SliceInt {
                     dest: StatePartIndex<BigSlots>(13), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(11), // (0x0) SlotDebugData { name: "", ty: UInt<2> },
                     start: 1,
                     len: 1,
                 },
-                123: Copy {
+                122: Copy {
                     dest: StatePartIndex<BigSlots>(14), // (0x0) SlotDebugData { name: "", ty: Bool },
                     src: StatePartIndex<BigSlots>(13), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                 },
-                124: Copy {
+                123: Copy {
                     dest: StatePartIndex<BigSlots>(8), // (0x0) SlotDebugData { name: ".0", ty: UInt<1> },
                     src: StatePartIndex<BigSlots>(12), // (0x0) SlotDebugData { name: "", ty: UInt<1> },
                 },
-                125: Copy {
+                124: Copy {
                     dest: StatePartIndex<BigSlots>(9), // (0x0) SlotDebugData { name: ".1", ty: Bool },
                     src: StatePartIndex<BigSlots>(14), // (0x0) SlotDebugData { name: "", ty: Bool },
                 },
                 // at: module-XXXXXXXXXX.rs:8:1
-                126: AndBigWithSmallImmediate {
+                125: AndBigWithSmallImmediate {
                     dest: StatePartIndex<SmallSlots>(0), // (0x0 0) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome} },
                     lhs: StatePartIndex<BigSlots>(7), // (0x0) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::b_out", ty: Enum {HdlNone, HdlSome(Bundle {0: UInt<1>, 1: Bool})} },
                     rhs: 0x1,
                 },
                 // at: module-XXXXXXXXXX.rs:11:1
-                127: BranchIfSmallZero {
+                126: BranchIfSmallZero {
-                    target: 132,
+                    target: 131,
                     value: StatePartIndex<SmallSlots>(3), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                128: BranchIfSmallNonZero {
+                127: BranchIfSmallNonZero {
-                    target: 131,
+                    target: 130,
                     value: StatePartIndex<SmallSlots>(5), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                 },
-                129: Copy {
+                128: Copy {
                     dest: StatePartIndex<BigSlots>(23), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(24), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg$next", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                 },
-                130: Branch {
+                129: Branch {
-                    target: 132,
+                    target: 131,
                 },
-                131: Copy {
+                130: Copy {
                     dest: StatePartIndex<BigSlots>(23), // (0x3e) SlotDebugData { name: "InstantiatedModule(enums: enums).enums::the_reg", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                     src: StatePartIndex<BigSlots>(26), // (0x0) SlotDebugData { name: "", ty: Enum {A, B(Bundle {0: UInt<1>, 1: Bool}), C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>})} },
                 },
-                132: XorSmallImmediate {
+                131: XorSmallImmediate {
                     dest: StatePartIndex<SmallSlots>(2), // (0x0 0) SlotDebugData { name: "", ty: Bool },
                     lhs: StatePartIndex<SmallSlots>(4), // (0x1 1) SlotDebugData { name: "", ty: Bool },
                     rhs: 0x1,
                 },
                 // at: module-XXXXXXXXXX.rs:1:1
-                133: Return,
+                132: Return,
             ],
             ..
         },
-        pc: 133,
+        pc: 132,
         memory_write_log: [],
         memories: StatePart {
             value: [],
@@ -1191,10 +1187,10 @@ Simulation {
             value: [
                 0,
                 0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
                 2,
             ],
         },
@@ -1207,110 +1203,110 @@ Simulation {
                 15,
                 2,
                 15,
-                0 (modified),
                 0,
                 0,
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
                 0,
                 0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                62 (modified),
+                0,
-                62 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
+                0,
+                0,
+                0,
+                62,
+                62,
+                0,
+                0,
+                1,
+                1,
+                62,
+                3,
+                1,
                 1,
                 1,
-                62 (modified),
-                3 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
                 1,
                 1,
                 -1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                15 (modified),
+                15,
-                3 (modified),
+                3,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                3 (modified),
+                3,
-                -1 (modified),
+                -1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                2 (modified),
+                2,
-                3 (modified),
+                3,
-                12 (modified),
+                12,
-                13 (modified),
+                13,
-                13 (modified),
+                13,
-                13 (modified),
+                13,
-                2 (modified),
+                2,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                -1 (modified),
+                -1,
-                2 (modified),
+                2,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                -1 (modified),
+                -1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                3 (modified),
+                3,
-                -1 (modified),
+                -1,
-                2 (modified),
+                2,
-                3 (modified),
+                3,
-                3 (modified),
+                3,
-                12 (modified),
+                12,
-                15 (modified),
+                15,
-                60 (modified),
+                60,
-                62 (modified),
+                62,
-                62 (modified),
+                62,
-                62 (modified),
+                62,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                2 (modified),
+                2,
-                3 (modified),
+                3,
-                3 (modified),
+                3,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
-                2 (modified),
+                2,
-                3 (modified),
+                3,
-                6 (modified),
+                6,
-                7 (modified),
+                7,
-                7 (modified),
+                7,
-                7 (modified),
+                7,
-                2 (modified),
+                2,
-                3 (modified),
+                3,
-                3 (modified),
+                3,
-                12 (modified),
+                12,
-                15 (modified),
+                15,
             ],
         },
         sim_only_slots: StatePart {
@@ -1746,7 +1742,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x0,
         },
@@ -1755,7 +1750,6 @@ Simulation {
             kind: BigSyncReset {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: false,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1764,7 +1758,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(2),
             },
-            maybe_changed: false,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1774,7 +1767,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<2>,
             },
-            maybe_changed: false,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1784,7 +1776,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(4),
                 ty: UInt<4>,
             },
-            maybe_changed: false,
             state: 0xf,
             last_state: 0xf,
         },
@@ -1794,7 +1785,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: UInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1804,7 +1794,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(6),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xf,
             last_state: 0xf,
         },
@@ -1817,7 +1806,6 @@ Simulation {
                     HdlSome(Bundle {0: UInt<1>, 1: Bool}),
                 },
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1827,7 +1815,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(8),
                 ty: UInt<1>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1836,7 +1823,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(9),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1849,7 +1835,6 @@ Simulation {
                     HdlSome(Bundle {0: UInt<1>, 1: Bool}),
                 },
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1859,7 +1844,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(16),
                 ty: UInt<1>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1868,7 +1852,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(17),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1882,7 +1865,6 @@ Simulation {
                     C(Bundle {a: Array<UInt<1>, 2>, b: SInt<2>}),
                 },
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1892,7 +1874,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(27),
                 ty: UInt<1>,
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1901,7 +1882,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(28),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1911,7 +1891,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(34),
                 ty: UInt<1>,
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1921,7 +1900,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(35),
                 ty: UInt<1>,
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1931,7 +1909,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(36),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x3,
             last_state: 0x3,
         },

crates/fayalite/tests/sim/expected/enums.vcd

@@ -1,126 +1,126 @@
 $timescale 1 ps $end
 $scope module enums $end
 $scope struct cd $end
-$var wire 1 0n\U< clk $end
+$var wire 1 ! clk $end
-$var wire 1 a?A!) rst $end
+$var wire 1 " rst $end
 $upscope $end
-$var wire 1 #ZQY# en $end
+$var wire 1 # en $end
-$var wire 2 8?II+ which_in $end
+$var wire 2 $ which_in $end
-$var wire 4 OO,N+ data_in $end
+$var wire 4 % data_in $end
-$var wire 2 yr2gr which_out $end
+$var wire 2 & which_out $end
-$var wire 4 q_O;Y data_out $end
+$var wire 4 ' data_out $end
 $scope struct b_out $end
-$var string 1 7L1gf \$tag $end
+$var string 1 ( \$tag $end
 $scope struct HdlSome $end
-$var wire 1 EO?Ju \0 $end
+$var wire 1 ) \0 $end
-$var wire 1 cGtNN \1 $end
+$var wire 1 * \1 $end
 $upscope $end
 $upscope $end
 $scope struct b2_out $end
-$var string 1 dqd@B \$tag $end
+$var string 1 + \$tag $end
 $scope struct HdlSome $end
-$var wire 1 (FG:I \0 $end
+$var wire 1 , \0 $end
-$var wire 1 dzy-= \1 $end
+$var wire 1 - \1 $end
 $upscope $end
 $upscope $end
 $scope struct the_reg $end
-$var string 1 J#9uO \$tag $end
+$var string 1 . \$tag $end
 $scope struct B $end
-$var reg 1 ca2Gh \0 $end
+$var reg 1 / \0 $end
-$var reg 1 f)r)? \1 $end
+$var reg 1 0 \1 $end
 $upscope $end
 $scope struct C $end
 $scope struct a $end
-$var reg 1 ;BepJ \[0] $end
+$var reg 1 1 \[0] $end
-$var reg 1 J~2;e \[1] $end
+$var reg 1 2 \[1] $end
 $upscope $end
-$var reg 2 w\b)K b $end
+$var reg 2 3 b $end
 $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-00n\U<
+0!
-1a?A!)
+1"
-0#ZQY#
+0#
-b0 8?II+
+b0 $
-b0 OO,N+
+b0 %
-b0 yr2gr
+b0 &
-b0 q_O;Y
+b0 '
-sHdlNone\x20(0) 7L1gf
+sHdlNone\x20(0) (
-0EO?Ju
+0)
-0cGtNN
+0*
-sHdlNone\x20(0) dqd@B
+sHdlNone\x20(0) +
-0(FG:I
+0,
-0dzy-=
+0-
-sA\x20(0) J#9uO
+sA\x20(0) .
-0ca2Gh
+0/
-0f)r)?
+00
-0;BepJ
+01
-0J~2;e
+02
-b0 w\b)K
+b0 3
 $end
 #1000000
-10n\U<
+1!
 #1100000
-0a?A!)
+0"
 #2000000
-00n\U<
+0!
 #3000000
-10n\U<
+1!
 #4000000
-1#ZQY#
+1#
-b1 8?II+
+b1 $
-00n\U<
+0!
 #5000000
-10n\U<
+1!
-b1 yr2gr
+b1 &
-sHdlSome\x20(1) 7L1gf
+sHdlSome\x20(1) (
-sHdlSome\x20(1) dqd@B
+sHdlSome\x20(1) +
-sB\x20(1) J#9uO
+sB\x20(1) .
 #6000000
-0#ZQY#
+0#
-b0 8?II+
+b0 $
-00n\U<
+0!
 #7000000
-10n\U<
+1!
 #8000000
-1#ZQY#
+1#
-b1 8?II+
+b1 $
-b1111 OO,N+
+b1111 %
-00n\U<
+0!
 #9000000
-10n\U<
+1!
-b11 q_O;Y
+b11 '
-1EO?Ju
+1)
-1cGtNN
+1*
-1(FG:I
+1,
-1dzy-=
+1-
-1ca2Gh
+1/
-1f)r)?
+10
-1;BepJ
+11
-1J~2;e
+12
 #10000000
-00n\U<
+0!
 #11000000
-10n\U<
+1!
 #12000000
-b10 8?II+
+b10 $
-00n\U<
+0!
 #13000000
-10n\U<
+1!
-b10 yr2gr
+b10 &
-b1111 q_O;Y
+b1111 '
-sHdlNone\x20(0) 7L1gf
+sHdlNone\x20(0) (
-0EO?Ju
+0)
-0cGtNN
+0*
-sHdlNone\x20(0) dqd@B
+sHdlNone\x20(0) +
-0(FG:I
+0,
-0dzy-=
+0-
-sC\x20(2) J#9uO
+sC\x20(2) .
-b11 w\b)K
+b11 3
 #14000000
-00n\U<
+0!
 #15000000
-10n\U<
+1!
 #16000000

crates/fayalite/tests/sim/expected/extern_module.txt

@@ -221,7 +221,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: false,
             state: 0x1,
             last_state: 0x1,
         },
@@ -230,7 +229,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x0,
         },

crates/fayalite/tests/sim/expected/extern_module.vcd

@@ -1,52 +1,52 @@
 $timescale 1 ps $end
 $scope module extern_module $end
-$var wire 1 `MLd_ i $end
+$var wire 1 ! i $end
-$var wire 1 ^;OnJ o $end
+$var wire 1 " o $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-0`MLd_
+0!
-0^;OnJ
+0"
 $end
-1^;OnJ
+1"
 #500000
 #1500000
-0^;OnJ
+0"
 #2500000
-1^;OnJ
+1"
 #3500000
-0^;OnJ
+0"
 #4500000
-1^;OnJ
+1"
 #5500000
-0^;OnJ
+0"
 #6500000
-1^;OnJ
+1"
 #7500000
-0^;OnJ
+0"
 #8500000
-1^;OnJ
+1"
 #9500000
-0^;OnJ
+0"
 #10000000
-1`MLd_
+1!
 #10500000
 #11500000
-1^;OnJ
+1"
 #12500000
-0^;OnJ
+0"
 #13500000
-1^;OnJ
+1"
 #14500000
-0^;OnJ
+0"
 #15500000
-1^;OnJ
+1"
 #16500000
-0^;OnJ
+0"
 #17500000
-1^;OnJ
+1"
 #18500000
-0^;OnJ
+0"
 #19500000
-1^;OnJ
+1"
 #20000000

crates/fayalite/tests/sim/expected/extern_module2.txt

@@ -57,7 +57,7 @@ Simulation {
         big_slots: StatePart {
             value: [
                 0,
-                1 (modified),
+                1,
                 101,
             ],
         },
@@ -280,7 +280,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(0),
             },
-            maybe_changed: false,
             state: 0x0,
             last_state: 0x0,
         },
@@ -289,7 +288,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -299,7 +297,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: UInt<8>,
             },
-            maybe_changed: false,
             state: 0x65,
             last_state: 0x65,
         },

crates/fayalite/tests/sim/expected/extern_module2.vcd

@@ -1,151 +1,151 @@
 $timescale 1 ps $end
 $scope module extern_module2 $end
-$var wire 1 oHT(x en $end
+$var wire 1 ! en $end
-$var wire 1 nHT-: clk $end
+$var wire 1 " clk $end
-$var wire 8 0:wF& o $end
+$var wire 8 # o $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-1oHT(x
+1!
-0nHT-:
+0"
-b0 0:wF&
+b0 #
 $end
-b1001000 0:wF&
+b1001000 #
 #1000000
-1nHT-:
+1"
-b1100101 0:wF&
+b1100101 #
 #2000000
-0nHT-:
+0"
 #3000000
-1nHT-:
+1"
-b1101100 0:wF&
+b1101100 #
 #4000000
-0nHT-:
+0"
 #5000000
-1nHT-:
+1"
 #6000000
-0nHT-:
+0"
 #7000000
-1nHT-:
+1"
-b1101111 0:wF&
+b1101111 #
 #8000000
-0nHT-:
+0"
 #9000000
-1nHT-:
+1"
-b101100 0:wF&
+b101100 #
 #10000000
-0oHT(x
+0!
-0nHT-:
+0"
 #11000000
-1nHT-:
+1"
 #12000000
-0nHT-:
+0"
 #13000000
-1nHT-:
+1"
 #14000000
-0nHT-:
+0"
 #15000000
-1nHT-:
+1"
 #16000000
-0nHT-:
+0"
 #17000000
-1nHT-:
+1"
 #18000000
-0nHT-:
+0"
 #19000000
-1nHT-:
+1"
 #20000000
-1oHT(x
+1!
-0nHT-:
+0"
 #21000000
-1nHT-:
+1"
-b100000 0:wF&
+b100000 #
 #22000000
-0nHT-:
+0"
 #23000000
-1nHT-:
+1"
-b1010111 0:wF&
+b1010111 #
 #24000000
-0nHT-:
+0"
 #25000000
-1nHT-:
+1"
-b1101111 0:wF&
+b1101111 #
 #26000000
-0nHT-:
+0"
 #27000000
-1nHT-:
+1"
-b1110010 0:wF&
+b1110010 #
 #28000000
-0nHT-:
+0"
 #29000000
-1nHT-:
+1"
-b1101100 0:wF&
+b1101100 #
 #30000000
-0oHT(x
+0!
-0nHT-:
+0"
 #31000000
-1nHT-:
+1"
 #32000000
-0nHT-:
+0"
 #33000000
-1nHT-:
+1"
 #34000000
-0nHT-:
+0"
 #35000000
-1nHT-:
+1"
 #36000000
-0nHT-:
+0"
 #37000000
-1nHT-:
+1"
 #38000000
-0nHT-:
+0"
 #39000000
-1nHT-:
+1"
 #40000000
-1oHT(x
+1!
-0nHT-:
+0"
 #41000000
-1nHT-:
+1"
-b1100100 0:wF&
+b1100100 #
 #42000000
-0nHT-:
+0"
 #43000000
-1nHT-:
+1"
-b100001 0:wF&
+b100001 #
 #44000000
-0nHT-:
+0"
 #45000000
-1nHT-:
+1"
-b1010 0:wF&
+b1010 #
 #46000000
-0nHT-:
+0"
 #47000000
-1nHT-:
+1"
-b1001000 0:wF&
+b1001000 #
 #48000000
-0nHT-:
+0"
 #49000000
-1nHT-:
+1"
-b1100101 0:wF&
+b1100101 #
 #50000000
-0oHT(x
+0!
-0nHT-:
+0"
 #51000000
-1nHT-:
+1"
 #52000000
-0nHT-:
+0"
 #53000000
-1nHT-:
+1"
 #54000000
-0nHT-:
+0"
 #55000000
-1nHT-:
+1"
 #56000000
-0nHT-:
+0"
 #57000000
-1nHT-:
+1"
 #58000000
-0nHT-:
+0"
 #59000000
-1nHT-:
+1"
 #60000000

crates/fayalite/tests/sim/expected/last_connect.txt

@@ -1,709 +0,0 @@
-Simulation {
-    state: State {
-        insns: Insns {
-            state_layout: StateLayout {
-                ty: TypeLayout {
-                    small_slots: StatePartLayout<SmallSlots> {
-                        len: 2,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome,
-                                },
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome,
-                                },
-                            },
-                        ],
-                        ..
-                    },
-                    big_slots: StatePartLayout<BigSlots> {
-                        len: 33,
-                        debug_data: [
-                            SlotDebugData {
-                                name: "InstantiatedModule(last_connect: last_connect).last_connect::inp",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome(Array<Bool, 4>),
-                                },
-                            },
-                            SlotDebugData {
-                                name: "[0]",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "[1]",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "[2]",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "[3]",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<5>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<4>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Bool,
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(last_connect: last_connect).last_connect::out",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome(UInt<8>),
-                                },
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<9>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<9>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome(UInt<8>),
-                                },
-                            },
-                            SlotDebugData {
-                                name: "InstantiatedModule(last_connect: last_connect).last_connect::w",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: ".0",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: ".1",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<1>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<9>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<9>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<9>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: Enum {
-                                    HdlNone,
-                                    HdlSome(UInt<8>),
-                                },
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                            SlotDebugData {
-                                name: "",
-                                ty: UInt<8>,
-                            },
-                        ],
-                        ..
-                    },
-                    sim_only_slots: StatePartLayout<SimOnlySlots> {
-                        len: 0,
-                        debug_data: [],
-                        layout_data: [],
-                        ..
-                    },
-                },
-                memories: StatePartLayout<Memories> {
-                    len: 0,
-                    debug_data: [],
-                    layout_data: [],
-                    ..
-                },
-            },
-            insns: [
-                // at: module-XXXXXXXXXX.rs:1:1
-                0: Const {
-                    dest: StatePartIndex<BigSlots>(32), // (0x3) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x3,
-                },
-                1: Const {
-                    dest: StatePartIndex<BigSlots>(31), // (0x2) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x2,
-                },
-                2: Const {
-                    dest: StatePartIndex<BigSlots>(30), // (0x1) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x1,
-                },
-                3: Const {
-                    dest: StatePartIndex<BigSlots>(29), // (0x0) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x0,
-                },
-                4: Const {
-                    dest: StatePartIndex<BigSlots>(28), // (0x4) SlotDebugData { name: "", ty: UInt<8> },
-                    value: 0x4,
-                },
-                // at: module-XXXXXXXXXX.rs:8:1
-                5: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(28), // (0x4) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                6: Const {
-                    dest: StatePartIndex<BigSlots>(23), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                    value: 0x1,
-                },
-                7: Const {
-                    dest: StatePartIndex<BigSlots>(18), // (0x0) SlotDebugData { name: "", ty: UInt<9> },
-                    value: 0x0,
-                },
-                8: Copy {
-                    dest: StatePartIndex<BigSlots>(19), // (0x0) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                    src: StatePartIndex<BigSlots>(18), // (0x0) SlotDebugData { name: "", ty: UInt<9> },
-                },
-                // at: module-XXXXXXXXXX.rs:4:1
-                9: Copy {
-                    dest: StatePartIndex<BigSlots>(15), // (0x7) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::out", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                    src: StatePartIndex<BigSlots>(19), // (0x0) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                10: Copy {
-                    dest: StatePartIndex<BigSlots>(5), // (0x1f) SlotDebugData { name: "", ty: UInt<5> },
-                    src: StatePartIndex<BigSlots>(0), // (0x1f) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::inp", ty: Enum {HdlNone, HdlSome(Array<Bool, 4>)} },
-                },
-                11: SliceInt {
-                    dest: StatePartIndex<BigSlots>(6), // (0xf) SlotDebugData { name: "", ty: UInt<4> },
-                    src: StatePartIndex<BigSlots>(5), // (0x1f) SlotDebugData { name: "", ty: UInt<5> },
-                    start: 1,
-                    len: 4,
-                },
-                12: SliceInt {
-                    dest: StatePartIndex<BigSlots>(7), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                    src: StatePartIndex<BigSlots>(6), // (0xf) SlotDebugData { name: "", ty: UInt<4> },
-                    start: 0,
-                    len: 1,
-                },
-                13: Copy {
-                    dest: StatePartIndex<BigSlots>(8), // (0x1) SlotDebugData { name: "", ty: Bool },
-                    src: StatePartIndex<BigSlots>(7), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                },
-                14: SliceInt {
-                    dest: StatePartIndex<BigSlots>(9), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                    src: StatePartIndex<BigSlots>(6), // (0xf) SlotDebugData { name: "", ty: UInt<4> },
-                    start: 1,
-                    len: 1,
-                },
-                15: Copy {
-                    dest: StatePartIndex<BigSlots>(10), // (0x1) SlotDebugData { name: "", ty: Bool },
-                    src: StatePartIndex<BigSlots>(9), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                },
-                16: SliceInt {
-                    dest: StatePartIndex<BigSlots>(11), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                    src: StatePartIndex<BigSlots>(6), // (0xf) SlotDebugData { name: "", ty: UInt<4> },
-                    start: 2,
-                    len: 1,
-                },
-                17: Copy {
-                    dest: StatePartIndex<BigSlots>(12), // (0x1) SlotDebugData { name: "", ty: Bool },
-                    src: StatePartIndex<BigSlots>(11), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                },
-                18: SliceInt {
-                    dest: StatePartIndex<BigSlots>(13), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                    src: StatePartIndex<BigSlots>(6), // (0xf) SlotDebugData { name: "", ty: UInt<4> },
-                    start: 3,
-                    len: 1,
-                },
-                19: Copy {
-                    dest: StatePartIndex<BigSlots>(14), // (0x1) SlotDebugData { name: "", ty: Bool },
-                    src: StatePartIndex<BigSlots>(13), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                },
-                20: Copy {
-                    dest: StatePartIndex<BigSlots>(1), // (0x1) SlotDebugData { name: "[0]", ty: Bool },
-                    src: StatePartIndex<BigSlots>(8), // (0x1) SlotDebugData { name: "", ty: Bool },
-                },
-                21: Copy {
-                    dest: StatePartIndex<BigSlots>(2), // (0x1) SlotDebugData { name: "[1]", ty: Bool },
-                    src: StatePartIndex<BigSlots>(10), // (0x1) SlotDebugData { name: "", ty: Bool },
-                },
-                22: Copy {
-                    dest: StatePartIndex<BigSlots>(3), // (0x1) SlotDebugData { name: "[2]", ty: Bool },
-                    src: StatePartIndex<BigSlots>(12), // (0x1) SlotDebugData { name: "", ty: Bool },
-                },
-                23: Copy {
-                    dest: StatePartIndex<BigSlots>(4), // (0x1) SlotDebugData { name: "[3]", ty: Bool },
-                    src: StatePartIndex<BigSlots>(14), // (0x1) SlotDebugData { name: "", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:9:1
-                24: BranchIfZero {
-                    target: 26,
-                    value: StatePartIndex<BigSlots>(1), // (0x1) SlotDebugData { name: "[0]", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:10:1
-                25: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(29), // (0x0) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:9:1
-                26: BranchIfZero {
-                    target: 28,
-                    value: StatePartIndex<BigSlots>(2), // (0x1) SlotDebugData { name: "[1]", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:10:1
-                27: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(30), // (0x1) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:9:1
-                28: BranchIfZero {
-                    target: 30,
-                    value: StatePartIndex<BigSlots>(3), // (0x1) SlotDebugData { name: "[2]", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:10:1
-                29: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(31), // (0x2) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:9:1
-                30: BranchIfZero {
-                    target: 32,
-                    value: StatePartIndex<BigSlots>(4), // (0x1) SlotDebugData { name: "[3]", ty: Bool },
-                },
-                // at: module-XXXXXXXXXX.rs:10:1
-                31: Copy {
-                    dest: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(32), // (0x3) SlotDebugData { name: "", ty: UInt<8> },
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                32: Copy {
-                    dest: StatePartIndex<BigSlots>(21), // (0x1) SlotDebugData { name: ".0", ty: UInt<1> },
-                    src: StatePartIndex<BigSlots>(23), // (0x1) SlotDebugData { name: "", ty: UInt<1> },
-                },
-                33: Copy {
-                    dest: StatePartIndex<BigSlots>(22), // (0x3) SlotDebugData { name: ".1", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(20), // (0x3) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::w", ty: UInt<8> },
-                },
-                34: Shl {
-                    dest: StatePartIndex<BigSlots>(24), // (0x6) SlotDebugData { name: "", ty: UInt<9> },
-                    lhs: StatePartIndex<BigSlots>(22), // (0x3) SlotDebugData { name: ".1", ty: UInt<8> },
-                    rhs: 1,
-                },
-                35: Or {
-                    dest: StatePartIndex<BigSlots>(25), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                    lhs: StatePartIndex<BigSlots>(21), // (0x1) SlotDebugData { name: ".0", ty: UInt<1> },
-                    rhs: StatePartIndex<BigSlots>(24), // (0x6) SlotDebugData { name: "", ty: UInt<9> },
-                },
-                36: CastToUInt {
-                    dest: StatePartIndex<BigSlots>(26), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                    src: StatePartIndex<BigSlots>(25), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                    dest_width: 9,
-                },
-                37: Copy {
-                    dest: StatePartIndex<BigSlots>(27), // (0x7) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                    src: StatePartIndex<BigSlots>(26), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                },
-                // at: module-XXXXXXXXXX.rs:2:1
-                38: AndBigWithSmallImmediate {
-                    dest: StatePartIndex<SmallSlots>(0), // (0x1 1) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome} },
-                    lhs: StatePartIndex<BigSlots>(0), // (0x1f) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::inp", ty: Enum {HdlNone, HdlSome(Array<Bool, 4>)} },
-                    rhs: 0x1,
-                },
-                // at: module-XXXXXXXXXX.rs:5:1
-                39: BranchIfSmallNeImmediate {
-                    target: 41,
-                    lhs: StatePartIndex<SmallSlots>(0), // (0x1 1) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome} },
-                    rhs: 0x1,
-                },
-                // at: module-XXXXXXXXXX.rs:7:1
-                40: Copy {
-                    dest: StatePartIndex<BigSlots>(15), // (0x7) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::out", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                    src: StatePartIndex<BigSlots>(27), // (0x7) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                },
-                // at: module-XXXXXXXXXX.rs:3:1
-                41: AndBigWithSmallImmediate {
-                    dest: StatePartIndex<SmallSlots>(1), // (0x1 1) SlotDebugData { name: "", ty: Enum {HdlNone, HdlSome} },
-                    lhs: StatePartIndex<BigSlots>(15), // (0x7) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::out", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                    rhs: 0x1,
-                },
-                // at: module-XXXXXXXXXX.rs:1:1
-                42: Copy {
-                    dest: StatePartIndex<BigSlots>(16), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                    src: StatePartIndex<BigSlots>(15), // (0x7) SlotDebugData { name: "InstantiatedModule(last_connect: last_connect).last_connect::out", ty: Enum {HdlNone, HdlSome(UInt<8>)} },
-                },
-                43: SliceInt {
-                    dest: StatePartIndex<BigSlots>(17), // (0x3) SlotDebugData { name: "", ty: UInt<8> },
-                    src: StatePartIndex<BigSlots>(16), // (0x7) SlotDebugData { name: "", ty: UInt<9> },
-                    start: 1,
-                    len: 8,
-                },
-                44: Return,
-            ],
-            ..
-        },
-        pc: 44,
-        memory_write_log: [],
-        memories: StatePart {
-            value: [],
-        },
-        small_slots: StatePart {
-            value: [
-                1,
-                1,
-            ],
-        },
-        big_slots: StatePart {
-            value: [
-                31 (modified),
-                1,
-                1,
-                1,
-                1,
-                31 (modified),
-                15 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                1 (modified),
-                7 (modified),
-                7 (modified),
-                3,
-                0 (modified),
-                0 (modified),
-                3,
-                1 (modified),
-                3 (modified),
-                1 (modified),
-                6 (modified),
-                7 (modified),
-                7 (modified),
-                7 (modified),
-                4 (modified),
-                0 (modified),
-                1 (modified),
-                2 (modified),
-                3 (modified),
-            ],
-        },
-        sim_only_slots: StatePart {
-            value: [],
-        },
-    },
-    io: Instance {
-        name: <simulator>::last_connect,
-        instantiated: Module {
-            name: last_connect,
-            ..
-        },
-    },
-    main_module: SimulationModuleState {
-        base_targets: [
-            Instance {
-                name: <simulator>::last_connect,
-                instantiated: Module {
-                    name: last_connect,
-                    ..
-                },
-            }.inp,
-            Instance {
-                name: <simulator>::last_connect,
-                instantiated: Module {
-                    name: last_connect,
-                    ..
-                },
-            }.out,
-        ],
-        uninitialized_ios: {},
-        io_targets: {
-            Instance {
-                name: <simulator>::last_connect,
-                instantiated: Module {
-                    name: last_connect,
-                    ..
-                },
-            }.inp,
-            Instance {
-                name: <simulator>::last_connect,
-                instantiated: Module {
-                    name: last_connect,
-                    ..
-                },
-            }.out,
-        },
-        did_initial_settle: true,
-        clocks_for_past: {},
-    },
-    extern_modules: [],
-    trace_decls: TraceModule {
-        name: "last_connect",
-        children: [
-            TraceModuleIO {
-                name: "inp",
-                child: TraceEnumWithFields {
-                    name: "inp",
-                    discriminant: TraceEnumDiscriminant {
-                        location: TraceScalarId(0),
-                        name: "$tag",
-                        ty: Enum {
-                            HdlNone,
-                            HdlSome(Array<Bool, 4>),
-                        },
-                        flow: Source,
-                    },
-                    non_empty_fields: [
-                        TraceArray {
-                            name: "HdlSome",
-                            elements: [
-                                TraceBool {
-                                    location: TraceScalarId(1),
-                                    name: "[0]",
-                                    flow: Source,
-                                },
-                                TraceBool {
-                                    location: TraceScalarId(2),
-                                    name: "[1]",
-                                    flow: Source,
-                                },
-                                TraceBool {
-                                    location: TraceScalarId(3),
-                                    name: "[2]",
-                                    flow: Source,
-                                },
-                                TraceBool {
-                                    location: TraceScalarId(4),
-                                    name: "[3]",
-                                    flow: Source,
-                                },
-                            ],
-                            ty: Array<Bool, 4>,
-                            flow: Source,
-                        },
-                    ],
-                    ty: Enum {
-                        HdlNone,
-                        HdlSome(Array<Bool, 4>),
-                    },
-                    flow: Source,
-                },
-                ty: Enum {
-                    HdlNone,
-                    HdlSome(Array<Bool, 4>),
-                },
-                flow: Source,
-            },
-            TraceModuleIO {
-                name: "out",
-                child: TraceEnumWithFields {
-                    name: "out",
-                    discriminant: TraceEnumDiscriminant {
-                        location: TraceScalarId(5),
-                        name: "$tag",
-                        ty: Enum {
-                            HdlNone,
-                            HdlSome(UInt<8>),
-                        },
-                        flow: Sink,
-                    },
-                    non_empty_fields: [
-                        TraceUInt {
-                            location: TraceScalarId(6),
-                            name: "HdlSome",
-                            ty: UInt<8>,
-                            flow: Source,
-                        },
-                    ],
-                    ty: Enum {
-                        HdlNone,
-                        HdlSome(UInt<8>),
-                    },
-                    flow: Sink,
-                },
-                ty: Enum {
-                    HdlNone,
-                    HdlSome(UInt<8>),
-                },
-                flow: Sink,
-            },
-            TraceWire {
-                name: "w",
-                child: TraceUInt {
-                    location: TraceScalarId(7),
-                    name: "w",
-                    ty: UInt<8>,
-                    flow: Duplex,
-                },
-                ty: UInt<8>,
-            },
-        ],
-    },
-    traces: [
-        SimTrace {
-            id: TraceScalarId(0),
-            kind: EnumDiscriminant {
-                index: StatePartIndex<SmallSlots>(0),
-                ty: Enum {
-                    HdlNone,
-                    HdlSome(Array<Bool, 4>),
-                },
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(1),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(1),
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(2),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(2),
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(3),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(3),
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(4),
-            kind: BigBool {
-                index: StatePartIndex<BigSlots>(4),
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x0,
-        },
-        SimTrace {
-            id: TraceScalarId(5),
-            kind: EnumDiscriminant {
-                index: StatePartIndex<SmallSlots>(1),
-                ty: Enum {
-                    HdlNone,
-                    HdlSome(UInt<8>),
-                },
-            },
-            maybe_changed: true,
-            state: 0x1,
-            last_state: 0x1,
-        },
-        SimTrace {
-            id: TraceScalarId(6),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(17),
-                ty: UInt<8>,
-            },
-            maybe_changed: true,
-            state: 0x03,
-            last_state: 0x02,
-        },
-        SimTrace {
-            id: TraceScalarId(7),
-            kind: BigUInt {
-                index: StatePartIndex<BigSlots>(20),
-                ty: UInt<8>,
-            },
-            maybe_changed: true,
-            state: 0x03,
-            last_state: 0x02,
-        },
-    ],
-    trace_memories: {},
-    trace_writers: [
-        Running(
-            VcdWriter {
-                finished_init: true,
-                timescale: 1 ps,
-                ..
-            },
-        ),
-    ],
-    clocks_triggered: [],
-    event_queue: EventQueue(EventQueueData {
-        instant: 17 μs,
-        events: {},
-    }),
-    waiting_sensitivity_sets_by_address: {},
-    waiting_sensitivity_sets_by_compiled_value: {},
-    ..
-}

crates/fayalite/tests/sim/expected/last_connect.vcd

@@ -1,104 +0,0 @@
-$timescale 1 ps $end
-$scope module last_connect $end
-$scope struct inp $end
-$var string 1 !C&}* \$tag $end
-$scope struct HdlSome $end
-$var wire 1 D_viZ \[0] $end
-$var wire 1 b5gFK \[1] $end
-$var wire 1 xUBRH \[2] $end
-$var wire 1 Gp7Xm \[3] $end
-$upscope $end
-$upscope $end
-$scope struct out $end
-$var string 1 ^Z_p3 \$tag $end
-$var wire 8 rz~), HdlSome $end
-$upscope $end
-$var wire 8 dlea> w $end
-$upscope $end
-$enddefinitions $end
-$dumpvars
-sHdlNone\x20(0) !C&}*
-0D_viZ
-0b5gFK
-0xUBRH
-0Gp7Xm
-sHdlNone\x20(0) ^Z_p3
-b0 rz~),
-b100 dlea>
-$end
-#1000000
-sHdlSome\x20(1) !C&}*
-sHdlSome\x20(1) ^Z_p3
-b100 rz~),
-#2000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#3000000
-1xUBRH
-0Gp7Xm
-b10 rz~),
-b10 dlea>
-#4000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#5000000
-1b5gFK
-0xUBRH
-0Gp7Xm
-b1 rz~),
-b1 dlea>
-#6000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#7000000
-1xUBRH
-0Gp7Xm
-b10 rz~),
-b10 dlea>
-#8000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#9000000
-1D_viZ
-0b5gFK
-0xUBRH
-0Gp7Xm
-b0 rz~),
-b0 dlea>
-#10000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#11000000
-1xUBRH
-0Gp7Xm
-b10 rz~),
-b10 dlea>
-#12000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#13000000
-1b5gFK
-0xUBRH
-0Gp7Xm
-b1 rz~),
-b1 dlea>
-#14000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#15000000
-1xUBRH
-0Gp7Xm
-b10 rz~),
-b10 dlea>
-#16000000
-1Gp7Xm
-b11 rz~),
-b11 dlea>
-#17000000

crates/fayalite/tests/sim/expected/memories.txt

@@ -522,18 +522,18 @@ Simulation {
         },
         small_slots: StatePart {
             value: [
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                2 (modified),
+                2,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                2 (modified),
+                2,
-                2 (modified),
+                2,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -562,10 +562,10 @@ Simulation {
                 -32,
                 1,
                 1,
-                208 (modified),
+                208,
-                -32 (modified),
+                -32,
-                1 (modified),
+                1,
-                1 (modified),
+                1,
             ],
         },
         sim_only_slots: StatePart {
@@ -1168,7 +1168,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1177,7 +1176,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1186,7 +1184,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(2),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -1196,7 +1193,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xb0,
             last_state: 0xb0,
         },
@@ -1206,7 +1202,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(4),
                 ty: SInt<8>,
             },
-            maybe_changed: true,
             state: 0xc0,
             last_state: 0xc0,
         },
@@ -1216,7 +1211,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1225,7 +1219,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(6),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1234,7 +1227,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(7),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -1244,7 +1236,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(8),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xd0,
             last_state: 0xd0,
         },
@@ -1254,7 +1245,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(9),
                 ty: SInt<8>,
             },
-            maybe_changed: true,
             state: 0xe0,
             last_state: 0xe0,
         },
@@ -1263,7 +1253,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(10),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1272,7 +1261,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(11),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1282,7 +1270,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(12),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1291,7 +1278,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(13),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1300,7 +1286,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(14),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -1310,7 +1295,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(15),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xb0,
             last_state: 0xb0,
         },
@@ -1320,7 +1304,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(16),
                 ty: SInt<8>,
             },
-            maybe_changed: true,
             state: 0xc0,
             last_state: 0xc0,
         },
@@ -1330,7 +1313,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(17),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -1339,7 +1321,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(18),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1348,7 +1329,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(19),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -1358,7 +1338,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(20),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0xd0,
             last_state: 0xd0,
         },
@@ -1368,7 +1347,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(21),
                 ty: SInt<8>,
             },
-            maybe_changed: true,
             state: 0xe0,
             last_state: 0xe0,
         },
@@ -1377,7 +1355,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(22),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },
@@ -1386,7 +1363,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(23),
             },
-            maybe_changed: true,
             state: 0x1,
             last_state: 0x1,
         },

crates/fayalite/tests/sim/expected/memories.vcd

@@ -1,408 +1,408 @@
 $timescale 1 ps $end
 $scope module memories $end
 $scope struct r $end
-$var wire 4 z&0Qk addr $end
+$var wire 4 ! addr $end
-$var wire 1 o.T)# en $end
+$var wire 1 " en $end
-$var wire 1 :XNoK clk $end
+$var wire 1 # clk $end
 $scope struct data $end
-$var wire 8 Cq]A% \0 $end
+$var wire 8 $ \0 $end
-$var wire 8 avKNj \1 $end
+$var wire 8 % \1 $end
 $upscope $end
 $upscope $end
 $scope struct w $end
-$var wire 4 p<O.M addr $end
+$var wire 4 & addr $end
-$var wire 1 #9)l8 en $end
+$var wire 1 ' en $end
-$var wire 1 QX!^| clk $end
+$var wire 1 ( clk $end
 $scope struct data $end
-$var wire 8 G"IXQ \0 $end
+$var wire 8 ) \0 $end
-$var wire 8 h\t:E \1 $end
+$var wire 8 * \1 $end
 $upscope $end
 $scope struct mask $end
-$var wire 1 FCuNz \0 $end
+$var wire 1 + \0 $end
-$var wire 1 /Y7%J \1 $end
+$var wire 1 , \1 $end
 $upscope $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
 $scope struct \[0] $end
 $scope struct mem $end
-$var reg 8 4d[cL \0 $end
+$var reg 8 9 \0 $end
-$var reg 8 {qEUV \1 $end
+$var reg 8 I \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[1] $end
 $scope struct mem $end
-$var reg 8 c`NPR \0 $end
+$var reg 8 : \0 $end
-$var reg 8 vK:33 \1 $end
+$var reg 8 J \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[2] $end
 $scope struct mem $end
-$var reg 8 ihYp_ \0 $end
+$var reg 8 ; \0 $end
-$var reg 8 QZb%P \1 $end
+$var reg 8 K \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[3] $end
 $scope struct mem $end
-$var reg 8 ,O%<$ \0 $end
+$var reg 8 < \0 $end
-$var reg 8 @?uSf \1 $end
+$var reg 8 L \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[4] $end
 $scope struct mem $end
-$var reg 8 N[IF& \0 $end
+$var reg 8 = \0 $end
-$var reg 8 Zf9lw \1 $end
+$var reg 8 M \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[5] $end
 $scope struct mem $end
-$var reg 8 dr6lq \0 $end
+$var reg 8 > \0 $end
-$var reg 8 fc"UR \1 $end
+$var reg 8 N \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[6] $end
 $scope struct mem $end
-$var reg 8 xpw5\ \0 $end
+$var reg 8 ? \0 $end
-$var reg 8 dd$?K \1 $end
+$var reg 8 O \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[7] $end
 $scope struct mem $end
-$var reg 8 vH;}2 \0 $end
+$var reg 8 @ \0 $end
-$var reg 8 ILB?4 \1 $end
+$var reg 8 P \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[8] $end
 $scope struct mem $end
-$var reg 8 /X4v> \0 $end
+$var reg 8 A \0 $end
-$var reg 8 &V*EE \1 $end
+$var reg 8 Q \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[9] $end
 $scope struct mem $end
-$var reg 8 IczZe \0 $end
+$var reg 8 B \0 $end
-$var reg 8 unX>R \1 $end
+$var reg 8 R \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[10] $end
 $scope struct mem $end
-$var reg 8 0hTyY \0 $end
+$var reg 8 C \0 $end
-$var reg 8 9K_w) \1 $end
+$var reg 8 S \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[11] $end
 $scope struct mem $end
-$var reg 8 +C/Sz \0 $end
+$var reg 8 D \0 $end
-$var reg 8 }Y{:o \1 $end
+$var reg 8 T \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[12] $end
 $scope struct mem $end
-$var reg 8 S6-5u \0 $end
+$var reg 8 E \0 $end
-$var reg 8 9q6)w \1 $end
+$var reg 8 U \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[13] $end
 $scope struct mem $end
-$var reg 8 !c<w* \0 $end
+$var reg 8 F \0 $end
-$var reg 8 Ve@)M \1 $end
+$var reg 8 V \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[14] $end
 $scope struct mem $end
-$var reg 8 OiF9* \0 $end
+$var reg 8 G \0 $end
-$var reg 8 Ylyz~ \1 $end
+$var reg 8 W \1 $end
 $upscope $end
 $upscope $end
 $scope struct \[15] $end
 $scope struct mem $end
-$var reg 8 ?+m9D \0 $end
+$var reg 8 H \0 $end
-$var reg 8 A6sb~ \1 $end
+$var reg 8 X \1 $end
 $upscope $end
 $upscope $end
 $upscope $end
 $scope struct r0 $end
-$var wire 4 ="2wN addr $end
+$var wire 4 - addr $end
-$var wire 1 jy78F en $end
+$var wire 1 . en $end
-$var wire 1 \o>8T clk $end
+$var wire 1 / clk $end
 $scope struct data $end
-$var wire 8 \k#l \0 $end
+$var wire 8 0 \0 $end
-$var wire 8 olx7O \1 $end
+$var wire 8 1 \1 $end
 $upscope $end
 $upscope $end
 $scope struct w1 $end
-$var wire 4 H,W!J addr $end
+$var wire 4 2 addr $end
-$var wire 1 "7?3I en $end
+$var wire 1 3 en $end
-$var wire 1 DC/;" clk $end
+$var wire 1 4 clk $end
 $scope struct data $end
-$var wire 8 0DrV' \0 $end
+$var wire 8 5 \0 $end
-$var wire 8 wa!Cx \1 $end
+$var wire 8 6 \1 $end
 $upscope $end
 $scope struct mask $end
-$var wire 1 u^b&R \0 $end
+$var wire 1 7 \0 $end
-$var wire 1 Ic\|v \1 $end
+$var wire 1 8 \1 $end
 $upscope $end
 $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-b1 4d[cL
+b1 9
-b100011 {qEUV
+b100011 I
-b1 c`NPR
+b1 :
-b100011 vK:33
+b100011 J
-b1 ihYp_
+b1 ;
-b100011 QZb%P
+b100011 K
-b1 ,O%<$
+b1 <
-b100011 @?uSf
+b100011 L
-b1 N[IF&
+b1 =
-b100011 Zf9lw
+b100011 M
-b1 dr6lq
+b1 >
-b100011 fc"UR
+b100011 N
-b1 xpw5\
+b1 ?
-b100011 dd$?K
+b100011 O
-b1 vH;}2
+b1 @
-b100011 ILB?4
+b100011 P
-b1 /X4v>
+b1 A
-b100011 &V*EE
+b100011 Q
-b1 IczZe
+b1 B
-b100011 unX>R
+b100011 R
-b1 0hTyY
+b1 C
-b100011 9K_w)
+b100011 S
-b1 +C/Sz
+b1 D
-b100011 }Y{:o
+b100011 T
-b1 S6-5u
+b1 E
-b100011 9q6)w
+b100011 U
-b1 !c<w*
+b1 F
-b100011 Ve@)M
+b100011 V
-b1 OiF9*
+b1 G
-b100011 Ylyz~
+b100011 W
-b1 ?+m9D
+b1 H
-b100011 A6sb~
+b100011 X
-b0 z&0Qk
+b0 !
-0o.T)#
+0"
-0:XNoK
+0#
-b0 Cq]A%
+b0 $
-b0 avKNj
+b0 %
-b0 p<O.M
+b0 &
-0#9)l8
+0'
-0QX!^|
+0(
-b0 G"IXQ
+b0 )
-b0 h\t:E
+b0 *
-0FCuNz
+0+
-0/Y7%J
+0,
-b0 ="2wN
+b0 -
-0jy78F
+0.
-0\o>8T
+0/
-b0 \k#l
+b0 0
-b0 olx7O
+b0 1
-b0 H,W!J
+b0 2
-0"7?3I
+03
-0DC/;"
+04
-b0 0DrV'
+b0 5
-b0 wa!Cx
+b0 6
-0u^b&R
+07
-0Ic\|v
+08
 $end
 #1000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #2000000
-1o.T)#
+1"
-0:XNoK
+0#
-b1 Cq]A%
+b1 $
-b100011 avKNj
+b100011 %
-1#9)l8
+1'
-0QX!^|
+0(
-b10000 G"IXQ
+b10000 )
-b100000 h\t:E
+b100000 *
-1FCuNz
+1+
-1/Y7%J
+1,
-1jy78F
+1.
-0\o>8T
+0/
-b1 \k#l
+b1 0
-b100011 olx7O
+b100011 1
-1"7?3I
+13
-0DC/;"
+04
-b10000 0DrV'
+b10000 5
-b100000 wa!Cx
+b100000 6
-1u^b&R
+17
-1Ic\|v
+18
 #3000000
-b10000 4d[cL
+b10000 9
-b100000 {qEUV
+b100000 I
-1:XNoK
+1#
-b10000 Cq]A%
+b10000 $
-b100000 avKNj
+b100000 %
-1QX!^|
+1(
-1\o>8T
+1/
-b10000 \k#l
+b10000 0
-b100000 olx7O
+b100000 1
-1DC/;"
+14
 #4000000
-0:XNoK
+0#
-0QX!^|
+0(
-b110000 G"IXQ
+b110000 )
-b1000000 h\t:E
+b1000000 *
-0FCuNz
+0+
-0\o>8T
+0/
-0DC/;"
+04
-b110000 0DrV'
+b110000 5
-b1000000 wa!Cx
+b1000000 6
-0u^b&R
+07
 #5000000
-b10000 4d[cL
+b10000 9
-b1000000 {qEUV
+b1000000 I
-1:XNoK
+1#
-b1000000 avKNj
+b1000000 %
-1QX!^|
+1(
-1\o>8T
+1/
-b1000000 olx7O
+b1000000 1
-1DC/;"
+14
 #6000000
-0:XNoK
+0#
-0QX!^|
+0(
-b1010000 G"IXQ
+b1010000 )
-b1100000 h\t:E
+b1100000 *
-1FCuNz
+1+
-0/Y7%J
+0,
-0\o>8T
+0/
-0DC/;"
+04
-b1010000 0DrV'
+b1010000 5
-b1100000 wa!Cx
+b1100000 6
-1u^b&R
+17
-0Ic\|v
+08
 #7000000
-b1010000 4d[cL
+b1010000 9
-b1000000 {qEUV
+b1000000 I
-1:XNoK
+1#
-b1010000 Cq]A%
+b1010000 $
-1QX!^|
+1(
-1\o>8T
+1/
-b1010000 \k#l
+b1010000 0
-1DC/;"
+14
 #8000000
-0:XNoK
+0#
-0QX!^|
+0(
-b1110000 G"IXQ
+b1110000 )
-b10000000 h\t:E
+b10000000 *
-0FCuNz
+0+
-0\o>8T
+0/
-0DC/;"
+04
-b1110000 0DrV'
+b1110000 5
-b10000000 wa!Cx
+b10000000 6
-0u^b&R
+07
 #9000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #10000000
-0:XNoK
+0#
-0#9)l8
+0'
-0QX!^|
+0(
-b10010000 G"IXQ
+b10010000 )
-b10100000 h\t:E
+b10100000 *
-0\o>8T
+0/
-0"7?3I
+03
-0DC/;"
+04
-b10010000 0DrV'
+b10010000 5
-b10100000 wa!Cx
+b10100000 6
 #11000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #12000000
-0:XNoK
+0#
-b1 p<O.M
+b1 &
-1#9)l8
+1'
-0QX!^|
+0(
-1FCuNz
+1+
-1/Y7%J
+1,
-0\o>8T
+0/
-b1 H,W!J
+b1 2
-1"7?3I
+13
-0DC/;"
+04
-1u^b&R
+17
-1Ic\|v
+18
 #13000000
-b10010000 c`NPR
+b10010000 :
-b10100000 vK:33
+b10100000 J
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #14000000
-0:XNoK
+0#
-b10 p<O.M
+b10 &
-0QX!^|
+0(
-b10110000 G"IXQ
+b10110000 )
-b11000000 h\t:E
+b11000000 *
-0\o>8T
+0/
-b10 H,W!J
+b10 2
-0DC/;"
+04
-b10110000 0DrV'
+b10110000 5
-b11000000 wa!Cx
+b11000000 6
 #15000000
-b10110000 ihYp_
+b10110000 ;
-b11000000 QZb%P
+b11000000 K
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #16000000
-0:XNoK
+0#
-0#9)l8
+0'
-0QX!^|
+0(
-b11010000 G"IXQ
+b11010000 )
-b11100000 h\t:E
+b11100000 *
-0\o>8T
+0/
-0"7?3I
+03
-0DC/;"
+04
-b11010000 0DrV'
+b11010000 5
-b11100000 wa!Cx
+b11100000 6
 #17000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #18000000
-b1 z&0Qk
+b1 !
-0:XNoK
+0#
-b10010000 Cq]A%
+b10010000 $
-b10100000 avKNj
+b10100000 %
-0QX!^|
+0(
-b1 ="2wN
+b1 -
-0\o>8T
+0/
-b10010000 \k#l
+b10010000 0
-b10100000 olx7O
+b10100000 1
-0DC/;"
+04
 #19000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #20000000
-b10 z&0Qk
+b10 !
-0:XNoK
+0#
-b10110000 Cq]A%
+b10110000 $
-b11000000 avKNj
+b11000000 %
-0QX!^|
+0(
-b10 ="2wN
+b10 -
-0\o>8T
+0/
-b10110000 \k#l
+b10110000 0
-b11000000 olx7O
+b11000000 1
-0DC/;"
+04
 #21000000
-1:XNoK
+1#
-1QX!^|
+1(
-1\o>8T
+1/
-1DC/;"
+14
 #22000000
-0:XNoK
+0#
-0QX!^|
+0(
-0\o>8T
+0/
-0DC/;"
+04

crates/fayalite/tests/sim/expected/memories2.txt

@@ -545,15 +545,15 @@ Simulation {
             value: [
                 0,
                 0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -568,32 +568,32 @@ Simulation {
                 0,
                 0,
                 0,
-                0 (modified),
                 0,
-                0 (modified),
                 0,
-                0 (modified),
-                0 (modified),
                 0,
-                0 (modified),
-                0 (modified),
                 0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                1,
-                1 (modified),
+                0,
-                1 (modified),
+                1,
-                1 (modified),
+                0,
+                0,
+                0,
+                0,
+                1,
+                1,
+                1,
             ],
         },
         sim_only_slots: StatePart {
@@ -943,7 +943,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -952,7 +951,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -961,7 +959,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(2),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -971,7 +968,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<2>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -980,7 +976,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(4),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -990,7 +985,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: UInt<2>,
             },
-            maybe_changed: false,
             state: 0x0,
             last_state: 0x0,
         },
@@ -999,7 +993,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(6),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1009,7 +1002,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(7),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1018,7 +1010,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(8),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1027,7 +1018,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(9),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -1040,7 +1030,6 @@ Simulation {
                     HdlSome(Bool),
                 },
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1049,7 +1038,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(16),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1058,7 +1046,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(11),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1071,7 +1058,6 @@ Simulation {
                     HdlSome(Bool),
                 },
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1080,7 +1066,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(19),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -1089,7 +1074,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(13),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },

crates/fayalite/tests/sim/expected/memories2.vcd

@@ -1,363 +1,363 @@
 $timescale 1 ps $end
 $scope module memories2 $end
 $scope struct rw $end
-$var wire 3 xkkG> addr $end
+$var wire 3 ! addr $end
-$var wire 1 HoA{1 en $end
+$var wire 1 " en $end
-$var wire 1 C*2BQ clk $end
+$var wire 1 # clk $end
-$var wire 2 ueF!x rdata $end
+$var wire 2 $ rdata $end
-$var wire 1 m\l/p wmode $end
+$var wire 1 % wmode $end
-$var wire 2 WmjEh wdata $end
+$var wire 2 & wdata $end
-$var wire 1 +3E@H wmask $end
+$var wire 1 ' wmask $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
 $scope struct \[0] $end
 $scope struct mem $end
-$var string 1 ujd9u \$tag $end
+$var string 1 1 \$tag $end
-$var reg 1 *5lV# HdlSome $end
+$var reg 1 6 HdlSome $end
 $upscope $end
 $upscope $end
 $scope struct \[1] $end
 $scope struct mem $end
-$var string 1 *qL|n \$tag $end
+$var string 1 2 \$tag $end
-$var reg 1 ^/FDC HdlSome $end
+$var reg 1 7 HdlSome $end
 $upscope $end
 $upscope $end
 $scope struct \[2] $end
 $scope struct mem $end
-$var string 1 r*7|@ \$tag $end
+$var string 1 3 \$tag $end
-$var reg 1 YMY"3 HdlSome $end
+$var reg 1 8 HdlSome $end
 $upscope $end
 $upscope $end
 $scope struct \[3] $end
 $scope struct mem $end
-$var string 1 jj/6F \$tag $end
+$var string 1 4 \$tag $end
-$var reg 1 S+Uy} HdlSome $end
+$var reg 1 9 HdlSome $end
 $upscope $end
 $upscope $end
 $scope struct \[4] $end
 $scope struct mem $end
-$var string 1 H72IP \$tag $end
+$var string 1 5 \$tag $end
-$var reg 1 vH{({ HdlSome $end
+$var reg 1 : HdlSome $end
 $upscope $end
 $upscope $end
 $upscope $end
 $scope struct rw0 $end
-$var wire 3 uabMI addr $end
+$var wire 3 ( addr $end
-$var wire 1 LEn[l en $end
+$var wire 1 ) en $end
-$var wire 1 OpH)U clk $end
+$var wire 1 * clk $end
 $scope struct rdata $end
-$var string 1 [}rcZ \$tag $end
+$var string 1 + \$tag $end
-$var wire 1 5f=Y~ HdlSome $end
+$var wire 1 , HdlSome $end
 $upscope $end
-$var wire 1 6c_9_ wmode $end
+$var wire 1 - wmode $end
 $scope struct wdata $end
-$var string 1 $hfRN \$tag $end
+$var string 1 . \$tag $end
-$var wire 1 rop,b HdlSome $end
+$var wire 1 / HdlSome $end
 $upscope $end
-$var wire 1 Ly=US wmask $end
+$var wire 1 0 wmask $end
 $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-sHdlSome\x20(1) ujd9u
+sHdlSome\x20(1) 1
-1*5lV#
+16
-sHdlSome\x20(1) *qL|n
+sHdlSome\x20(1) 2
-1^/FDC
+17
-sHdlSome\x20(1) r*7|@
+sHdlSome\x20(1) 3
-1YMY"3
+18
-sHdlSome\x20(1) jj/6F
+sHdlSome\x20(1) 4
-1S+Uy}
+19
-sHdlSome\x20(1) H72IP
+sHdlSome\x20(1) 5
-1vH{({
+1:
-b0 xkkG>
+b0 !
-0HoA{1
+0"
-0C*2BQ
+0#
-b0 ueF!x
+b0 $
-0m\l/p
+0%
-b0 WmjEh
+b0 &
-0+3E@H
+0'
-b0 uabMI
+b0 (
-0LEn[l
+0)
-0OpH)U
+0*
-sHdlNone\x20(0) [}rcZ
+sHdlNone\x20(0) +
-05f=Y~
+0,
-06c_9_
+0-
-sHdlNone\x20(0) $hfRN
+sHdlNone\x20(0) .
-0rop,b
+0/
-0Ly=US
+00
 $end
 #250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #500000
 #750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #1000000
-1HoA{1
+1"
-1LEn[l
+1)
 #1250000
-1C*2BQ
+1#
-b11 ueF!x
+b11 $
-1OpH)U
+1*
-sHdlSome\x20(1) [}rcZ
+sHdlSome\x20(1) +
-15f=Y~
+1,
 #1500000
 #1750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #2000000
-0HoA{1
+0"
-0LEn[l
+0)
 #2250000
-1C*2BQ
+1#
-b0 ueF!x
+b0 $
-1OpH)U
+1*
-sHdlNone\x20(0) [}rcZ
+sHdlNone\x20(0) +
-05f=Y~
+0,
 #2500000
 #2750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #3000000
-1HoA{1
+1"
-1m\l/p
+1%
-1+3E@H
+1'
-1LEn[l
+1)
-16c_9_
+1-
-1Ly=US
+10
 #3250000
-sHdlNone\x20(0) ujd9u
+sHdlNone\x20(0) 1
-0*5lV#
+06
-1C*2BQ
+1#
-1OpH)U
+1*
 #3500000
 #3750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #4000000
-0m\l/p
+0%
-0+3E@H
+0'
-06c_9_
+0-
-0Ly=US
+00
 #4250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #4500000
 #4750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #5000000
-1m\l/p
+1%
-b11 WmjEh
+b11 &
-16c_9_
+1-
-sHdlSome\x20(1) $hfRN
+sHdlSome\x20(1) .
-1rop,b
+1/
 #5250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #5500000
 #5750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #6000000
-b1 xkkG>
+b1 !
-b1 WmjEh
+b1 &
-1+3E@H
+1'
-b1 uabMI
+b1 (
-0rop,b
+0/
-1Ly=US
+10
 #6250000
-sHdlSome\x20(1) *qL|n
+sHdlSome\x20(1) 2
-0^/FDC
+07
-1C*2BQ
+1#
-1OpH)U
+1*
 #6500000
 #6750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #7000000
-b10 xkkG>
+b10 !
-b10 WmjEh
+b10 &
-b10 uabMI
+b10 (
-sHdlNone\x20(0) $hfRN
+sHdlNone\x20(0) .
 #7250000
-sHdlNone\x20(0) r*7|@
+sHdlNone\x20(0) 3
-0YMY"3
+08
-1C*2BQ
+1#
-1OpH)U
+1*
 #7500000
 #7750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #8000000
-b11 xkkG>
+b11 !
-b11 WmjEh
+b11 &
-b11 uabMI
+b11 (
-sHdlSome\x20(1) $hfRN
+sHdlSome\x20(1) .
-1rop,b
+1/
 #8250000
-sHdlSome\x20(1) jj/6F
+sHdlSome\x20(1) 4
-1S+Uy}
+19
-1C*2BQ
+1#
-1OpH)U
+1*
 #8500000
 #8750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #9000000
-b100 xkkG>
+b100 !
-b10 WmjEh
+b10 &
-b100 uabMI
+b100 (
-sHdlNone\x20(0) $hfRN
+sHdlNone\x20(0) .
-0rop,b
+0/
 #9250000
-sHdlNone\x20(0) H72IP
+sHdlNone\x20(0) 5
-0vH{({
+0:
-1C*2BQ
+1#
-1OpH)U
+1*
 #9500000
 #9750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #10000000
-b101 xkkG>
+b101 !
-b1 WmjEh
+b1 &
-b101 uabMI
+b101 (
-sHdlSome\x20(1) $hfRN
+sHdlSome\x20(1) .
 #10250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #10500000
 #10750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #11000000
-b110 xkkG>
+b110 !
-b110 uabMI
+b110 (
 #11250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #11500000
 #11750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #12000000
-b111 xkkG>
+b111 !
-b111 uabMI
+b111 (
 #12250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #12500000
 #12750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #13000000
-0m\l/p
+0%
-b0 WmjEh
+b0 &
-0+3E@H
+0'
-06c_9_
+0-
-sHdlNone\x20(0) $hfRN
+sHdlNone\x20(0) .
-0Ly=US
+00
 #13250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #13500000
 #13750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #14000000
-b110 xkkG>
+b110 !
-b110 uabMI
+b110 (
 #14250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #14500000
 #14750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #15000000
-b101 xkkG>
+b101 !
-b101 uabMI
+b101 (
 #15250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #15500000
 #15750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #16000000
-b100 xkkG>
+b100 !
-b100 uabMI
+b100 (
 #16250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #16500000
 #16750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #17000000
-b11 xkkG>
+b11 !
-b11 uabMI
+b11 (
 #17250000
-1C*2BQ
+1#
-b11 ueF!x
+b11 $
-1OpH)U
+1*
-sHdlSome\x20(1) [}rcZ
+sHdlSome\x20(1) +
-15f=Y~
+1,
 #17500000
 #17750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #18000000
-b10 xkkG>
+b10 !
-b10 uabMI
+b10 (
 #18250000
-1C*2BQ
+1#
-b0 ueF!x
+b0 $
-1OpH)U
+1*
-sHdlNone\x20(0) [}rcZ
+sHdlNone\x20(0) +
-05f=Y~
+0,
 #18500000
 #18750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #19000000
-b0 xkkG>
+b0 !
-b0 uabMI
+b0 (
 #19250000
-1C*2BQ
+1#
-1OpH)U
+1*
 #19500000
 #19750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #20000000
-b1 xkkG>
+b1 !
-b1 uabMI
+b1 (
 #20250000
-1C*2BQ
+1#
-b1 ueF!x
+b1 $
-1OpH)U
+1*
-sHdlSome\x20(1) [}rcZ
+sHdlSome\x20(1) +
 #20500000
 #20750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #21000000
-b0 xkkG>
+b0 !
-0HoA{1
+0"
-b0 uabMI
+b0 (
-0LEn[l
+0)
 #21250000
-1C*2BQ
+1#
-b0 ueF!x
+b0 $
-1OpH)U
+1*
-sHdlNone\x20(0) [}rcZ
+sHdlNone\x20(0) +
 #21500000
 #21750000
-0C*2BQ
+0#
-0OpH)U
+0*
 #22000000

crates/fayalite/tests/sim/expected/memories3.txt

@@ -1356,20 +1356,20 @@ Simulation {
         },
         small_slots: StatePart {
             value: [
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -1415,22 +1415,6 @@ Simulation {
                 0,
                 0,
                 0,
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
-                0 (modified),
                 0,
                 0,
                 0,
@@ -1450,38 +1434,54 @@ Simulation {
                 0,
                 0,
                 0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
+                0,
             ],
         },
         sim_only_slots: StatePart {
@@ -2391,7 +2391,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2400,7 +2399,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2409,7 +2407,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(2),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -2419,7 +2416,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2429,7 +2425,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(4),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2439,7 +2434,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2449,7 +2443,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(6),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2459,7 +2452,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(7),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2469,7 +2461,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(8),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2479,7 +2470,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(9),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2489,7 +2479,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(10),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2499,7 +2488,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(11),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2508,7 +2496,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(12),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2517,7 +2504,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(13),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -2527,7 +2513,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(14),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2537,7 +2522,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(15),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2547,7 +2531,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(16),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2557,7 +2540,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(17),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2567,7 +2549,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(18),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2577,7 +2558,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(19),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2587,7 +2567,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(20),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2597,7 +2576,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(21),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2606,7 +2584,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(22),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2615,7 +2592,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(23),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2624,7 +2600,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(24),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2633,7 +2608,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(25),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2642,7 +2616,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(26),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2651,7 +2624,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(27),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2660,7 +2632,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(28),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2669,7 +2640,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(29),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2679,7 +2649,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(30),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2688,7 +2657,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(31),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2697,7 +2665,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(32),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -2707,7 +2674,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(33),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2717,7 +2683,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(34),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2727,7 +2692,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(35),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2737,7 +2701,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(36),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2747,7 +2710,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(37),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2757,7 +2719,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(38),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2767,7 +2728,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(39),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2777,7 +2737,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(40),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2787,7 +2746,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(57),
                 ty: UInt<3>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2796,7 +2754,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(58),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2805,7 +2762,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(59),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x1,
         },
@@ -2815,7 +2771,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(60),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2825,7 +2780,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(61),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2835,7 +2789,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(62),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2845,7 +2798,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(63),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2855,7 +2807,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(64),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2865,7 +2816,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(65),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2875,7 +2825,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(66),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2885,7 +2834,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(67),
                 ty: UInt<8>,
             },
-            maybe_changed: true,
             state: 0x00,
             last_state: 0x00,
         },
@@ -2894,7 +2842,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(68),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2903,7 +2850,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(69),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2912,7 +2858,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(70),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2921,7 +2866,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(71),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2930,7 +2874,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(72),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2939,7 +2882,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(73),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2948,7 +2890,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(74),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -2957,7 +2898,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(75),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },

crates/fayalite/tests/sim/expected/mod1.txt

@@ -207,11 +207,11 @@ Simulation {
                 -2,
                 -2,
                 15,
-                -2 (modified),
+                -2,
-                14 (modified),
+                14,
-                5 (modified),
+                5,
-                1 (modified),
+                1,
-                15 (modified),
+                15,
             ],
         },
         sim_only_slots: StatePart {
@@ -445,7 +445,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xa,
             last_state: 0x3,
         },
@@ -455,7 +454,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(1),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x3,
         },
@@ -465,7 +463,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(2),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -475,7 +472,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(3),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xf,
             last_state: 0xe,
         },
@@ -485,7 +481,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(8),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xa,
             last_state: 0x3,
         },
@@ -495,7 +490,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(9),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x3,
         },
@@ -505,7 +499,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(10),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -515,7 +508,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(11),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xf,
             last_state: 0xe,
         },
@@ -525,7 +517,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(4),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xa,
             last_state: 0x3,
         },
@@ -535,7 +526,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(5),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x3,
         },
@@ -545,7 +535,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(6),
                 ty: SInt<2>,
             },
-            maybe_changed: true,
             state: 0x2,
             last_state: 0x2,
         },
@@ -555,7 +544,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(7),
                 ty: UInt<4>,
             },
-            maybe_changed: true,
             state: 0xf,
             last_state: 0xe,
         },

crates/fayalite/tests/sim/expected/mod1.vcd

@@ -1,34 +1,47 @@
 $timescale 1 ps $end
 $scope module mod1 $end
 $scope struct o $end
-$var wire 4 avK(^ i $end
+$var wire 4 ! i $end
-$var wire 2 Q2~aG o $end
+$var wire 2 " o $end
-$var wire 2 DXK'| i2 $end
+$var wire 2 # i2 $end
-$var wire 4 cPuix o2 $end
+$var wire 4 $ o2 $end
 $upscope $end
-$scope module child $end
+$scope struct child $end
-$var wire 4 ($5K7 i $end
+$var wire 4 ) i $end
-$var wire 2 %6Wv" o $end
+$var wire 2 * o $end
-$var wire 2 +|-AU i2 $end
+$var wire 2 + i2 $end
-$var wire 4 Hw?%j o2 $end
+$var wire 4 , o2 $end
+$upscope $end
+$scope module mod1_child $end
+$var wire 4 % i $end
+$var wire 2 & o $end
+$var wire 2 ' i2 $end
+$var wire 4 ( o2 $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-b11 avK(^
+b11 !
-b11 Q2~aG
+b11 "
-b10 DXK'|
+b10 #
-b1110 cPuix
+b1110 $
-b11 ($5K7
+b11 %
-b11 %6Wv"
+b11 &
-b10 +|-AU
+b10 '
-b1110 Hw?%j
+b1110 (
+b11 )
+b11 *
+b10 +
+b1110 ,
 $end
 #1000000
-b1010 avK(^
+b1010 !
-b10 Q2~aG
+b10 "
-b1111 cPuix
+b1111 $
-b1010 ($5K7
+b1010 %
-b10 %6Wv"
+b10 &
-b1111 Hw?%j
+b1111 (
+b1010 )
+b10 *
+b1111 ,
 #2000000

crates/fayalite/tests/sim/expected/phantom_const.txt

@@ -185,11 +185,11 @@ Simulation {
         },
         small_slots: StatePart {
             value: [
-                1 (modified),
+                1,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
             ],
         },
         big_slots: StatePart {
@@ -197,11 +197,11 @@ Simulation {
                 0,
                 0,
                 0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
-                0 (modified),
+                0,
             ],
         },
         sim_only_slots: StatePart {
@@ -373,7 +373,6 @@ Simulation {
                     ["a","b"],
                 ),
             },
-            maybe_changed: true,
             state: PhantomConst,
             last_state: PhantomConst,
         },
@@ -384,7 +383,6 @@ Simulation {
                     ["a","b"],
                 ),
             },
-            maybe_changed: true,
             state: PhantomConst,
             last_state: PhantomConst,
         },
@@ -394,7 +392,6 @@ Simulation {
                 index: StatePartIndex<BigSlots>(0),
                 ty: UInt<0>,
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -403,7 +400,6 @@ Simulation {
             kind: BigBool {
                 index: StatePartIndex<BigSlots>(1),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -412,7 +408,6 @@ Simulation {
             kind: BigClock {
                 index: StatePartIndex<BigSlots>(2),
             },
-            maybe_changed: true,
             state: 0x0,
             last_state: 0x0,
         },
@@ -423,7 +418,6 @@ Simulation {
                     "mem_element",
                 ),
             },
-            maybe_changed: true,
             state: PhantomConst,
             last_state: PhantomConst,
         },

crates/fayalite/tests/sim/expected/phantom_const.vcd

@@ -1,31 +1,31 @@
 $timescale 1 ps $end
 $scope module phantom_const $end
 $scope struct out $end
-$var string 1 Ru)8A \[0] $end
+$var string 1 ! \[0] $end
-$var string 1 y&ssi \[1] $end
+$var string 1 " \[1] $end
 $upscope $end
 $scope struct mem $end
 $scope struct contents $end
 $scope struct \[0] $end
-$var string 1 =+olp mem $end
+$var string 1 ' mem $end
 $upscope $end
 $upscope $end
 $scope struct r0 $end
-$var string 0 U5SS1 addr $end
+$var string 0 # addr $end
-$var wire 1 rx@_T en $end
+$var wire 1 $ en $end
-$var wire 1 o[(us clk $end
+$var wire 1 % clk $end
-$var string 1 %Bg(6 data $end
+$var string 1 & data $end
 $upscope $end
 $upscope $end
 $upscope $end
 $enddefinitions $end
 $dumpvars
-s0 =+olp
+s0 '
-sPhantomConst([\"a\",\"b\"]) Ru)8A
+sPhantomConst([\"a\",\"b\"]) !
-sPhantomConst([\"a\",\"b\"]) y&ssi
+sPhantomConst([\"a\",\"b\"]) "
-s0 U5SS1
+s0 #
-0rx@_T
+0$
-0o[(us
+0%
-sPhantomConst(\"mem_element\") %Bg(6
+sPhantomConst(\"mem_element\") &
 $end
 #1000000