luke/verilator
1
0
Fork 0
mirror of https://github.com/verilator/verilator.git synced 2026-09-03 05:43:37 +02:00
Code Issues Packages Projects Releases Wiki Activity

Support unconstrained randomization for unions (#5395) (#5396)

Browse Source
This commit is contained in:
Yilou Wang
2024-08-26 11:04:45 -04:00
committed by GitHub
parent 4e86e60491
commit c4cb26fa9a
9 changed files with 274 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/V3Randomize.cpp
+12 -1
View File
@@ -1319,6 +1319,16 @@ class RandomizeVisitor final : public VNVisitor {
}
}
return stmtsp;
} else if (const auto* const unionDtp = VN_CAST(memberp ? memberp->subDTypep()->skipRefp()
: exprp->dtypep()->skipRefp(),
UnionDType)) {
if (!unionDtp->packed()) {
unionDtp->v3error("Unpacked unions shall not be declared as rand or randc."
" (IEEE 1800-2023 18.4)");
return nullptr;
}
AstMemberDType* const firstMemberp = unionDtp->membersp();
return newRandStmtsp(fl, exprp, nullptr, offset, firstMemberp);
} else {
AstNodeExpr* valp;
if (AstEnumDType* const enumDtp = VN_CAST(memberp ? memberp->subDTypep()->subDTypep()
@@ -1498,7 +1508,8 @@ class RandomizeVisitor final : public VNVisitor {
}
if (memberVarp->user3()) return; // Handled in constraints
const AstNodeDType* const dtypep = memberVarp->dtypep()->skipRefp();
if (VN_IS(dtypep, BasicDType) || VN_IS(dtypep, StructDType)) {
if (VN_IS(dtypep, BasicDType) || VN_IS(dtypep, StructDType)
|| VN_IS(dtypep, UnionDType)) {
AstVar* const randcVarp = newRandcVarsp(memberVarp);
AstVarRef* const refp = new AstVarRef{fl, classp, memberVarp, VAccess::WRITE};
AstNodeStmt* const stmtp = newRandStmtsp(fl, refp, randcVarp);