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Add support for packed multidimensional arrays

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* Generalization of dimensions metadata (also simplifies $size et al.)
* Parsing and elaboration of multidimensional packed ranges
This commit is contained in:
Dag Lem 2024-01-25 07:28:15 +01:00 • committed by Zachary Snow
parent ac0fb2e301
commit 39fea32c6e
7 changed files with 247 additions and 267 deletions
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22
frontends/ast/ast.h
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@ -202,9 +202,17 @@ namespace AST
// set for IDs typed to an enumeration, not used
bool is_enum;
// if this is a multirange memory then this vector contains offset and length of each dimension
std::vector<int> multirange_dimensions;
std::vector<bool> multirange_swapped; // true if range is swapped
// Declared range for array dimension.
struct dimension_t {
int range_right; // lsb in [msb:lsb]
int range_width; // msb - lsb + 1
bool range_swapped; // if the declared msb < lsb, msb and lsb above are swapped
};
// Packed and unpacked dimensions for arrays.
// Unpacked dimensions go first, to follow the order of indexing.
std::vector<dimension_t> dimensions;
// Number of unpacked dimensions.
int unpacked_dimensions;
// this is set by simplify and used during RTLIL generation
AstNode *id2ast;
@ -371,6 +379,10 @@ namespace AST
// localized fixups after modifying children/attributes of a particular node
void fixup_hierarchy_flags(bool force_descend = false);
// helpers for indexing
AstNode *make_index_range(AstNode *node, bool unpacked_range = false);
AstNode *get_struct_member() const;
// helper to print errors from simplify/genrtlil code
[[noreturn]] void input_error(const char *format, ...) const YS_ATTRIBUTE(format(printf, 2, 3));
};
@ -416,10 +428,6 @@ namespace AST
// Helper for setting the src attribute.
void set_src_attr(RTLIL::AttrObject *obj, const AstNode *ast);
// struct helper exposed from simplify for genrtlil
AstNode *make_struct_member_range(AstNode *node, AstNode *member_node);
AstNode *get_struct_member(const AstNode *node);
// generate standard $paramod... derived module name; parameters should be
// in the order they are declared in the instantiated module
std::string derived_module_name(std::string stripped_name, const std::vector<std::pair<RTLIL::IdString, RTLIL::Const>> &parameters);