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Add CONST_FLAG_UNSIZED

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In order to support unsized constants being used as parameters, the `const` struct needs to know if it is unsized (so that the parameter can be used to set the size).
Add unsized flag to param value serialization and rtlil back-/front-end.
Add cell params to `tests/rtlil/everything.v`.
This commit is contained in:
Krystine Sherwin
2025-11-07 17:45:07 +13:00
parent e4c5900acd
commit 7302bf9a66
5 changed files with 39 additions and 8 deletions
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backends/rtlil/rtlil_backend.cc
+5 -2
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@@ -61,7 +61,9 @@ void RTLIL_BACKEND::dump_const(std::ostream &f, const RTLIL::Const &data, int wi
return;
}
}
f << stringf("%d'", width);
if ((data.flags & RTLIL::CONST_FLAG_UNSIZED) == 0) {
f << stringf("%d'", width);
}
if (data.flags & RTLIL::CONST_FLAG_SIGNED) {
f << stringf("s");
}
@@ -172,9 +174,10 @@ void RTLIL_BACKEND::dump_cell(std::ostream &f, std::string indent, const RTLIL::
dump_attributes(f, indent, cell);
f << stringf("%s" "cell %s %s\n", indent, cell->type, cell->name);
for (const auto& [name, param] : reversed(cell->parameters)) {
f << stringf("%s parameter%s%s %s ", indent,
f << stringf("%s parameter%s%s%s %s ", indent,
(param.flags & RTLIL::CONST_FLAG_SIGNED) != 0 ? " signed" : "",
(param.flags & RTLIL::CONST_FLAG_REAL) != 0 ? " real" : "",
(param.flags & RTLIL::CONST_FLAG_UNSIZED) != 0 ? " unsized" : "",
name);
dump_const(f, param);
f << stringf("\n");