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Merge 51560b0bf6 into c21cd300a0

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Gus Smith 2025-06-03 09:44:53 +12:00 • committed by GitHub
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4 changed files with 166 additions and 4 deletions
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63
backends/functional/smtlib_rosette.cc
View file

@ -188,12 +188,14 @@ struct SmtrModule {
Functional::IR ir;
SmtrScope scope;
std::string name;
std::optional<std::string> input_helper_name;
std::optional<std::string> output_helper_name;
SmtrStruct input_struct;
SmtrStruct output_struct;
SmtrStruct state_struct;
SmtrModule(Module *module)
SmtrModule(Module *module, bool assoc_list_helpers)
: ir(Functional::IR::from_module(module))
, scope()
, name(scope.unique_name(module->name))
@ -202,6 +204,12 @@ struct SmtrModule {
, state_struct(scope.unique_name(module->name.str() + "_State"), scope)
{
scope.reserve(name + "_initial");
if (assoc_list_helpers) {
input_helper_name = scope.unique_name(module->name.str() + "_inputs_helper");
scope.reserve(*input_helper_name);
output_helper_name = scope.unique_name(module->name.str() + "_outputs_helper");
scope.reserve(*output_helper_name);
}
for (auto input : ir.inputs())
input_struct.insert(input->name, input->sort);
for (auto output : ir.outputs())
@ -257,6 +265,43 @@ struct SmtrModule {
w.pop();
}
void write_assoc_list_helpers(SExprWriter &w)
{
// Input struct keyword-based constructor.
w.push();
w.open(list("define"));
const auto inputs_name = "inputs";
w.open(list(*input_helper_name, inputs_name));
w.close();
w.open(list(input_struct.name));
for (auto input : ir.inputs()) {
w.push();
w.open(list("let"));
w.push();
w.open(list());
w.open(list("assoc-result"));
w << list("assoc", "\"" + RTLIL::unescape_id(input->name) + "\"", inputs_name);
w.pop();
w.open(list("if", "assoc-result"));
w << list("cdr", "assoc-result");
w.open(list("begin"));
w << list("fprintf", list("current-error-port"), "\"%s not found in inputs\"");
w << "'not-found";
w.pop();
}
w.pop();
// Output struct keyword-based destructor.
w.push();
w.open(list("define"));
const auto outputs_name = "outputs";
w << list(*output_helper_name, outputs_name);
w.open(list("list"));
for (auto output : ir.outputs()) {
w << list("cons", "\"" + RTLIL::unescape_id(output->name) + "\"", output_struct.access("outputs", output->name));
}
w.pop();
}
void write(std::ostream &out)
{
SExprWriter w(out);
@ -265,6 +310,12 @@ struct SmtrModule {
output_struct.write_definition(w);
state_struct.write_definition(w);
if (input_helper_name) {
if (!output_helper_name)
log_error("if keyword helpers are enabled, both input and output helper names are expected");
write_assoc_list_helpers(w);
}
write_eval(w);
write_initial(w);
}
@ -282,12 +333,16 @@ struct FunctionalSmtrBackend : public Backend {
log("\n");
log(" -provides\n");
log(" include 'provide' statement(s) for loading output as a module\n");
log(" -assoc-list-helpers\n");
log(" provide helper functions which convert inputs/outputs from/to association lists\n");
log(" \n");
log("\n");
}
void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) override
{
auto provides = false;
auto assoc_list_helpers = false;
log_header(design, "Executing Functional Rosette Backend.\n");
@ -296,6 +351,8 @@ struct FunctionalSmtrBackend : public Backend {
{
if (args[argidx] == "-provides")
provides = true;
else if (args[argidx] == "-assoc-list-helpers")
assoc_list_helpers = true;
else
break;
}
@ -308,7 +365,7 @@ struct FunctionalSmtrBackend : public Backend {
for (auto module : design->selected_modules()) {
log("Processing module `%s`.\n", module->name.c_str());
SmtrModule smtr(module);
SmtrModule smtr(module, assoc_list_helpers);
smtr.write(*f);
}
}

2
tests/functional/run-test.sh
View file

@ -1,2 +1,2 @@
#!/usr/bin/env bash
pytest -v -m "not smt and not rkt" "$@"
pytest -v "$@"

1
tests/functional/simulate_rosette.py Normal file
View file

@ -0,0 +1 @@
"""Python utilities for simulating Rosette code."""

104
tests/functional/simulate_rosette.rkt Normal file
View file

@ -0,0 +1,104 @@
; Utilities for simulating Rosette programs.
#lang racket/base
(provide simulate-rosette)
(require (only-in rosette bv)
racket/match
racket/list)
; Inputs:
; - function: The function for the module to simulate. This should be a Rosette function generated by
; Yosys's `write_fuctional_rosette` backend.
; - input-helper, output-helper: association-list-based helpers for input and output struct, generated
; by Yosys's `write_fuctional_rosette` backend with `-assoc-list-helpers` enabled.
; - initial-state: The initial state of the module, as generated by Yosys's `write_fuctional_rosette`
; backend.
(define (simulate-rosette #:function function
#:input-helper input-helper
#:output-helper output-helper
#:initial-state initial-state
#:inputs inputs
#:outputs outputs)
(error "TODO: Implement simulate-rosette function"))
; Inputs:
; - config: Association list mapping input name (string) to a configuration value, which is one of the
; following:
; - 'exhaustive: The input should be exhaustively tested.
; - <integer>: The input should be tested with this many random inputs. When the input is not
; present in the config, it defaults to 'exhaustive.
; -
(define (generate-inputs #:input-helper input-helper
#:num-inputs num-inputs
#:config config
#:inputs inputs)
; Fill out missing vallues in the config with 'exhaustive.
(define config
(map (λ (input)
(let ([found (assoc (car input) config)]) (or found (cons (car input) 'exhaustive))))
inputs))
; ; Generate the inputs.
; (define generated-inputs
; (map (λ (input)
; (let ([input-name (car input)] [input-bitwidth (cdr input)])
; (cond
; [(equal? 'exhaustive (cdr (assoc input-name config))) (list input-name 'exhaustive)]
; [(number? (cdr (assoc input-name config)))
; (list input-name (make-random-input input-type (cdr (assoc input-name config))))]
; [else (error "Invalid configuration for input" input-name)])))
; inputs))
(error "TODO"))
; Helper function: for a given input name, bitwidth, and configuration, generate a list of inputs.
; Output: List of Rosette bitvector values for the input.
(define (generate-inputs-for-one input-name bitwidth config)
(cond
; If the configuration is 'exhaustive, or if they request a number of inputs that is greater than
; or equal to the number of possible values for the bitwidth, generate all possible inputs.
[(or (equal? config 'exhaustive) (and (number? config) (>= config (expt 2 bitwidth))))
(for/list ([n (range (expt 2 bitwidth))])
(bv n bitwidth))]
[(and (number? config) (positive? config))
(map (λ (_) (bv (random (expt 2 bitwidth)) bitwidth)) (range config))]
[else (error (format "Invalid configuration ~a for input ~a" config input-name))]))
; This is what gets executed when the script is run.
(module main racket/base
(require racket/cmdline))
(module+ test
(require rackunit)
(test-case "generate-inputs-for-one"
(check-equal? (generate-inputs-for-one "input1" 4 'exhaustive)
(list (bv 0 4)
(bv 1 4)
(bv 2 4)
(bv 3 4)
(bv 4 4)
(bv 5 4)
(bv 6 4)
(bv 7 4)
(bv 8 4)
(bv 9 4)
(bv 10 4)
(bv 11 4)
(bv 12 4)
(bv 13 4)
(bv 14 4)
(bv 15 4)))
; Requesting fewer inputs than the number of possible values for the bitwidth.
(check-equal? (length (generate-inputs-for-one "input2" 3 5)) 5)
; Requesting more inputs than the number of possible values for the bitwidth.
(check-equal? (generate-inputs-for-one "input3" 2 5) (list (bv 0 2) (bv 1 2) (bv 2 2) (bv 3 2)))
; Requesting equal number of inputs as the number of possible values for the bitwidth.
(check-equal? (generate-inputs-for-one "input4" 2 4) (list (bv 0 2) (bv 1 2) (bv 2 2) (bv 3 2)))
; Requesting invalid configuration should raise an error.
(check-exn exn:fail? (λ () (generate-inputs-for-one "input5" 2 'invalid-config)))
(check-exn exn:fail? (λ () (generate-inputs-for-one "input5" 2 bytes->string/latin-1)))))