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Support basic dist constraints (#5431)

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This commit is contained in:
Arkadiusz Kozdra
2024-09-12 05:20:36 -07:00
committed by GitHub
parent 140eb0a6e5
commit 0b7510befa
8 changed files with 188 additions and 42 deletions
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src/V3Randomize.cpp
+1 -6
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@@ -640,11 +640,6 @@ class ConstraintExprVisitor final : public VNVisitor {
// Fall back to "(ite cond then else)"
visit(static_cast<AstNodeTriop*>(nodep));
}
void visit(AstDist* nodep) override {
nodep->v3warn(CONSTRAINTIGN, "Constraint expression ignored (unsupported)");
nodep->replaceWith(new AstSFormatF{nodep->fileline(), "true", false, nullptr});
VL_DO_DANGLING(nodep->deleteTree(), nodep);
}
void visit(AstReplicate* nodep) override {
// Biop, but RHS is harmful
if (editFormat(nodep)) return;
@@ -720,7 +715,7 @@ class ConstraintExprVisitor final : public VNVisitor {
VL_DO_DANGLING(nodep->deleteTree(), nodep);
}
void visit(AstConstraintBefore* nodep) override {
nodep->v3warn(CONSTRAINTIGN, "Constraint expression ignored (unsupported)");
nodep->v3warn(CONSTRAINTIGN, "Constraint expression ignored (imperfect distribution)");
VL_DO_DANGLING(nodep->unlinkFrBack()->deleteTree(), nodep);
}
void visit(AstConstraintUnique* nodep) override {