This commit is contained in:
Yilou Wang
GitHub
parent
a031dd1a22
commit
2bb807a931
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@ -947,76 +947,195 @@ class ConstraintExprVisitor final : public VNVisitor {
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if (isGlobalConstrained) m_writtenVars.insert(smtName);
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// For global constraints, delete nodep after processing
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if (isGlobalConstrained && !nodep->backp()) VL_DO_DANGLING(pushDeletep(nodep), nodep);
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AstCMethodHard* const methodp = new AstCMethodHard{
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varp->fileline(),
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new AstVarRef{varp->fileline(), VN_AS(m_genp->user2p(), NodeModule), m_genp,
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VAccess::READWRITE},
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VCMethod::RANDOMIZER_WRITE_VAR};
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uint32_t dimension = 0;
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if (VN_IS(varp->dtypep(), UnpackArrayDType) || VN_IS(varp->dtypep(), DynArrayDType)
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|| VN_IS(varp->dtypep(), QueueDType) || VN_IS(varp->dtypep(), AssocArrayDType)) {
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const std::pair<uint32_t, uint32_t> dims
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= varp->dtypep()->dimensions(/*includeBasic=*/true);
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const uint32_t unpackedDimensions = dims.second;
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dimension = unpackedDimensions;
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}
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if (VN_IS(varp->dtypeSkipRefp(), StructDType)
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&& !VN_AS(varp->dtypeSkipRefp(), StructDType)->packed()) {
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VN_AS(varp->dtypeSkipRefp(), StructDType)->markConstrainedRand(true);
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dimension = 1;
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}
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methodp->dtypeSetVoid();
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AstNodeModule* classp;
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if (membersel) {
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// For membersel, find the root varref to get the class where randomize() is called
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AstNode* rootNode = membersel->fromp();
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while (AstMemberSel* nestedMemberSel = VN_CAST(rootNode, MemberSel)) {
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rootNode = nestedMemberSel->fromp();
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// Detect if variable is an array of class references
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bool isClassRefArray = false;
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AstClassRefDType* elemClassRefDtp = nullptr;
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{
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AstNodeDType* varDtp = varp->dtypep()->skipRefp();
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if (VN_IS(varDtp, DynArrayDType) || VN_IS(varDtp, QueueDType)
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|| VN_IS(varDtp, UnpackArrayDType) || VN_IS(varDtp, AssocArrayDType)) {
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AstNodeDType* const elemDtp = varDtp->subDTypep()->skipRefp();
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elemClassRefDtp = VN_CAST(elemDtp, ClassRefDType);
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if (elemClassRefDtp) isClassRefArray = true;
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}
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if (AstNodeVarRef* rootVarRef = VN_CAST(rootNode, NodeVarRef)) {
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classp = VN_AS(rootVarRef->varp()->user2p(), NodeModule);
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} else {
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classp = VN_AS(membersel->user2p(), NodeModule);
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}
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if (isClassRefArray && !membersel) {
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// Per-member registration loop for class ref arrays
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FileLine* const fl = varp->fileline();
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AstClass* const elemClassp = elemClassRefDtp->classp();
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AstNodeModule* const varClassp = VN_AS(varp->user2p(), NodeModule);
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AstVar* const iterVarp
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= new AstVar{fl, VVarType::BLOCKTEMP, "__Vi", varp->findUInt32DType()};
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iterVarp->funcLocal(true);
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iterVarp->lifetime(VLifetime::AUTOMATIC_EXPLICIT);
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AstNode* const stmtsp = iterVarp;
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stmtsp->addNext(new AstAssign{fl, new AstVarRef{fl, iterVarp, VAccess::WRITE},
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new AstConst{fl, 0}});
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AstVarRef* const arraySizeRef = new AstVarRef{fl, varClassp, varp, VAccess::READ};
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arraySizeRef->classOrPackagep(classOrPackagep);
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AstCMethodHard* const sizep
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= new AstCMethodHard{fl, arraySizeRef, VCMethod::DYN_SIZE, nullptr};
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sizep->dtypeSetUInt32();
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AstLoop* const loopp = new AstLoop{fl};
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stmtsp->addNext(loopp);
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loopp->addStmtsp(new AstLoopTest{
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fl, loopp, new AstLt{fl, new AstVarRef{fl, iterVarp, VAccess::READ}, sizep}});
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AstVarRef* const arrayAtRef = new AstVarRef{fl, varClassp, varp, VAccess::READ};
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arrayAtRef->classOrPackagep(classOrPackagep);
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AstCMethodHard* const atReadp
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= new AstCMethodHard{fl, arrayAtRef, VCMethod::ARRAY_AT,
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new AstVarRef{fl, iterVarp, VAccess::READ}};
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atReadp->dtypep(elemClassRefDtp);
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AstIf* const ifNonNullp = new AstIf{
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fl, new AstNeq{fl, atReadp, new AstConst{fl, AstConst::Null{}}}, nullptr};
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loopp->addStmtsp(ifNonNullp);
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AstCStmt* const bufDeclp = new AstCStmt{fl, "char __Vn[256];\n"};
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ifNonNullp->addThensp(bufDeclp);
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// 32-bit index → 8 hex chars for SMT name formatting
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constexpr int idxWidth = 32;
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const int fmtWidth = VL_WORDS_I(idxWidth) * 8;
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for (const AstClass* cp = elemClassp; cp;
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cp = cp->extendsp() ? cp->extendsp()->classp() : nullptr) {
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for (AstNode* mnodep = cp->stmtsp(); mnodep; mnodep = mnodep->nextp()) {
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AstVar* const memberVarp = VN_CAST(mnodep, Var);
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if (!memberVarp || !memberVarp->rand().isRandomizable()) continue;
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AstNodeDType* const memberDtp = memberVarp->dtypep()->skipRefp();
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if (VN_IS(memberDtp, ClassRefDType) || VN_IS(memberDtp, DynArrayDType)
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|| VN_IS(memberDtp, QueueDType) || VN_IS(memberDtp, UnpackArrayDType)
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|| VN_IS(memberDtp, AssocArrayDType))
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continue;
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const int memberWidth = memberDtp->width();
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AstCStmt* const fmtp = new AstCStmt{fl};
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fmtp->add("VL_SNPRINTF(__Vn, sizeof(__Vn), \"" + smtName + ".%0"
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+ std::to_string(fmtWidth) + "x." + memberVarp->name()
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+ "\", (unsigned)");
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fmtp->add(new AstVarRef{fl, iterVarp, VAccess::READ});
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fmtp->add(");\n");
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ifNonNullp->addThensp(fmtp);
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AstVarRef* const arrayWrRef
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= new AstVarRef{fl, varClassp, varp, VAccess::WRITE};
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arrayWrRef->classOrPackagep(classOrPackagep);
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AstCMethodHard* const atWritep
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= new AstCMethodHard{fl, arrayWrRef, VCMethod::ARRAY_AT_WRITE,
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new AstVarRef{fl, iterVarp, VAccess::READ}};
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atWritep->dtypep(elemClassRefDtp);
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AstMemberSel* const memberSelp
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= new AstMemberSel{fl, atWritep, memberVarp};
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AstCMethodHard* const writeVarp = new AstCMethodHard{
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fl,
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new AstVarRef{fl, VN_AS(m_genp->user2p(), NodeModule), m_genp,
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VAccess::READWRITE},
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VCMethod::RANDOMIZER_WRITE_VAR};
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writeVarp->dtypeSetVoid();
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writeVarp->addPinsp(memberSelp);
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writeVarp->addPinsp(new AstConst{fl, AstConst::Unsized64{},
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static_cast<uint64_t>(memberWidth)});
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AstCExpr* const nameRefp = new AstCExpr{fl, AstCExpr::Pure{}, "__Vn", 0};
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nameRefp->dtypep(varp->dtypep());
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writeVarp->addPinsp(nameRefp);
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writeVarp->addPinsp(new AstConst{fl, AstConst::Unsized64{}, 0ULL});
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ifNonNullp->addThensp(writeVarp->makeStmt());
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}
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}
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methodp->addPinsp(membersel);
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} else {
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classp = VN_AS(varp->user2p(), NodeModule);
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AstVarRef* const varRefp
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= new AstVarRef{varp->fileline(), classp, varp, VAccess::WRITE};
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varRefp->classOrPackagep(classOrPackagep);
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methodp->addPinsp(varRefp);
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}
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AstNodeDType* tmpDtypep = varp->dtypep();
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while (VN_IS(tmpDtypep, UnpackArrayDType) || VN_IS(tmpDtypep, DynArrayDType)
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|| VN_IS(tmpDtypep, QueueDType) || VN_IS(tmpDtypep, AssocArrayDType))
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tmpDtypep = tmpDtypep->subDTypep();
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const size_t width = tmpDtypep->width();
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methodp->addPinsp(
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new AstConst{varp->dtypep()->fileline(), AstConst::Unsized64{}, width});
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AstNodeExpr* const varnamep = new AstCExpr{varp->fileline(), AstCExpr::Pure{},
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"\"" + smtName + "\"", varp->width()};
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varnamep->dtypep(varp->dtypep());
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methodp->addPinsp(varnamep);
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methodp->addPinsp(
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new AstConst{varp->dtypep()->fileline(), AstConst::Unsized64{}, dimension});
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// Don't pass randMode.index for global constraints with membersel
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// because constraint object can't access nested object's randmode array
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if (randMode.usesMode && !(isGlobalConstrained && membersel)) {
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methodp->addPinsp(
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new AstConst{varp->fileline(), AstConst::Unsized64{}, randMode.index});
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}
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AstNodeFTask* initTaskp = m_inlineInitTaskp;
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if (!initTaskp) {
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loopp->addStmtsp(
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new AstAssign{fl, new AstVarRef{fl, iterVarp, VAccess::WRITE},
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new AstAdd{fl, new AstConst{fl, 1},
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new AstVarRef{fl, iterVarp, VAccess::READ}}});
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AstBegin* const beginp = new AstBegin{fl, "", stmtsp, true};
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varp->user3(true);
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if (membersel) {
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initTaskp = VN_AS(m_memberMap.findMember(classp, "randomize"), NodeFTask);
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UASSERT_OBJ(initTaskp, classp, "No randomize() in class");
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} else {
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initTaskp = VN_AS(m_memberMap.findMember(classp, "new"), NodeFTask);
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UASSERT_OBJ(initTaskp, classp, "No new() in class");
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AstNodeFTask* initTaskp = m_inlineInitTaskp;
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if (!initTaskp) {
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initTaskp = VN_AS(m_memberMap.findMember(varClassp, "new"), NodeFTask);
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UASSERT_OBJ(initTaskp, varClassp, "No new() in class");
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}
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initTaskp->addStmtsp(beginp);
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} else {
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AstCMethodHard* const methodp = new AstCMethodHard{
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varp->fileline(),
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new AstVarRef{varp->fileline(), VN_AS(m_genp->user2p(), NodeModule), m_genp,
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VAccess::READWRITE},
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VCMethod::RANDOMIZER_WRITE_VAR};
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uint32_t dimension = 0;
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if (VN_IS(varp->dtypep(), UnpackArrayDType) || VN_IS(varp->dtypep(), DynArrayDType)
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|| VN_IS(varp->dtypep(), QueueDType)
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|| VN_IS(varp->dtypep(), AssocArrayDType)) {
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const std::pair<uint32_t, uint32_t> dims
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= varp->dtypep()->dimensions(/*includeBasic=*/true);
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const uint32_t unpackedDimensions = dims.second;
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dimension = unpackedDimensions;
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}
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if (VN_IS(varp->dtypeSkipRefp(), StructDType)
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&& !VN_AS(varp->dtypeSkipRefp(), StructDType)->packed()) {
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VN_AS(varp->dtypeSkipRefp(), StructDType)->markConstrainedRand(true);
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dimension = 1;
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}
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methodp->dtypeSetVoid();
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AstNodeModule* classp;
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if (membersel) {
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// For membersel, find the root varref to get the class
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AstNode* rootNode = membersel->fromp();
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while (AstMemberSel* nestedMemberSel = VN_CAST(rootNode, MemberSel)) {
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rootNode = nestedMemberSel->fromp();
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}
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if (AstNodeVarRef* rootVarRef = VN_CAST(rootNode, NodeVarRef)) {
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classp = VN_AS(rootVarRef->varp()->user2p(), NodeModule);
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} else {
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classp = VN_AS(membersel->user2p(), NodeModule);
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}
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methodp->addPinsp(membersel);
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} else {
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classp = VN_AS(varp->user2p(), NodeModule);
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AstVarRef* const varRefp
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= new AstVarRef{varp->fileline(), classp, varp, VAccess::WRITE};
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varRefp->classOrPackagep(classOrPackagep);
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methodp->addPinsp(varRefp);
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}
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AstNodeDType* tmpDtypep = varp->dtypep();
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while (VN_IS(tmpDtypep, UnpackArrayDType) || VN_IS(tmpDtypep, DynArrayDType)
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|| VN_IS(tmpDtypep, QueueDType) || VN_IS(tmpDtypep, AssocArrayDType))
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tmpDtypep = tmpDtypep->subDTypep();
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const size_t width = tmpDtypep->width();
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methodp->addPinsp(
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new AstConst{varp->dtypep()->fileline(), AstConst::Unsized64{}, width});
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AstNodeExpr* const varnamep = new AstCExpr{varp->fileline(), AstCExpr::Pure{},
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"\"" + smtName + "\"", varp->width()};
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varnamep->dtypep(varp->dtypep());
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methodp->addPinsp(varnamep);
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methodp->addPinsp(
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new AstConst{varp->dtypep()->fileline(), AstConst::Unsized64{}, dimension});
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// Don't pass randMode.index for global constraints with membersel
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if (randMode.usesMode && !(isGlobalConstrained && membersel)) {
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methodp->addPinsp(
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new AstConst{varp->fileline(), AstConst::Unsized64{}, randMode.index});
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}
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AstNodeFTask* initTaskp = m_inlineInitTaskp;
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if (!initTaskp) {
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varp->user3(true);
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if (membersel) {
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initTaskp = VN_AS(m_memberMap.findMember(classp, "randomize"), NodeFTask);
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UASSERT_OBJ(initTaskp, classp, "No randomize() in class");
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} else {
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initTaskp = VN_AS(m_memberMap.findMember(classp, "new"), NodeFTask);
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UASSERT_OBJ(initTaskp, classp, "No new() in class");
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}
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}
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initTaskp->addStmtsp(methodp->makeStmt());
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}
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initTaskp->addStmtsp(methodp->makeStmt());
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} else {
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// Variable already written, clean up cloned membersel if any
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if (membersel) VL_DO_DANGLING(membersel->deleteTree(), membersel);
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@ -1259,6 +1378,38 @@ class ConstraintExprVisitor final : public VNVisitor {
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nodep->replaceWith(varRefp);
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VL_DO_DANGLING(pushDeletep(nodep), nodep);
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visit(varRefp);
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} else if (nodep->user1() && VN_IS(nodep->fromp(), CMethodHard)
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&& VN_AS(nodep->fromp(), CMethodHard)->method() == VCMethod::ARRAY_AT) {
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// Class ref array element member access (e.g., items[i].val)
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AstCMethodHard* const cmethodp = VN_AS(nodep->fromp(), CMethodHard);
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AstNodeDType* const arrayDtp = cmethodp->fromp()->dtypep()->skipRefp();
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AstNodeDType* const elemDtp = arrayDtp->subDTypep()->skipRefp();
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if (VN_IS(elemDtp, ClassRefDType)) {
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VL_RESTORER(m_structSel);
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m_structSel = true;
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iterateChildren(nodep);
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FileLine* const fl = nodep->fileline();
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AstSFormatF* newp = nullptr;
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if (AstSFormatF* const fromp = VN_CAST(nodep->fromp(), SFormatF)) {
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if (fromp->name() == "%@.%@") {
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newp = new AstSFormatF{fl, "%@.%@." + nodep->name(), false,
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fromp->exprsp()->cloneTreePure(true)};
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} else {
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newp = new AstSFormatF{fl, fromp->name() + "." + nodep->name(), false,
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nullptr};
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}
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} else {
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newp = new AstSFormatF{fl, nodep->name(), false, nullptr};
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}
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nodep->replaceWith(newp);
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VL_DO_DANGLING(pushDeletep(nodep), nodep);
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return;
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}
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// Not a class ref element, fall through to normal handling
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iterateChildren(nodep);
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nodep->replaceWith(nodep->fromp()->unlinkFrBack());
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VL_DO_DANGLING(nodep->deleteTree(), nodep);
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return;
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} else if (nodep->user1()) {
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iterateChildren(nodep);
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nodep->replaceWith(nodep->fromp()->unlinkFrBack());
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@ -1270,6 +1421,7 @@ class ConstraintExprVisitor final : public VNVisitor {
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}
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void visit(AstSFormatF* nodep) override {}
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void visit(AstStmtExpr* nodep) override {}
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void visit(AstCStmt* nodep) override {}
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void visit(AstConstraintIf* nodep) override {
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AstNodeExpr* newp = nullptr;
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FileLine* const fl = nodep->fileline();
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@ -0,0 +1,21 @@
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#!/usr/bin/env python3
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# DESCRIPTION: Verilator: Verilog Test driver/expect definition
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#
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# Copyright 2026 by Wilson Snyder. This program is free software; you
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# can redistribute it and/or modify it under the terms of either the GNU
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# Lesser General Public License Version 3 or the Perl Artistic License
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# Version 2.0.
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# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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import vltest_bootstrap
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test.scenarios('simulator')
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if not test.have_solver:
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test.skip("No constraint solver installed")
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test.compile()
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test.execute()
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test.passes()
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@ -0,0 +1,110 @@
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// DESCRIPTION: Verilator: Verilog Test module
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//
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// This file ONLY is placed under the Creative Commons Public Domain, for
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// any use, without warranty, 2026 by PlanV GmbH.
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// SPDX-License-Identifier: CC0-1.0
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// Test: Inline foreach constraints on dynamic arrays and queues of class objects
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class Inner;
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rand bit [7:0] val;
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rand bit [3:0] tag;
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function new();
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val = 0;
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tag = 0;
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endfunction
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endclass
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class OuterDyn;
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rand Inner items[];
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function new(int size = 3);
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items = new[size];
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foreach (items[i]) items[i] = new();
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endfunction
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endclass
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class OuterQueue;
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rand Inner items[$];
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function new(int size = 3);
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Inner tmp;
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for (int i = 0; i < size; i++) begin
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tmp = new();
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items.push_back(tmp);
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end
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endfunction
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endclass
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module t;
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OuterDyn od;
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OuterQueue oq;
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initial begin
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// === Test 1: Dynamic array with inline foreach constraint ===
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od = new(3);
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|
||||
if (od.randomize() with {
|
||||
foreach (items[i]) {
|
||||
items[i].val > 10;
|
||||
items[i].val < 200;
|
||||
items[i].tag > 0;
|
||||
}
|
||||
} == 0) begin
|
||||
$display("FAIL: dyn randomize() returned 0");
|
||||
$stop;
|
||||
end
|
||||
|
||||
foreach (od.items[i]) begin
|
||||
if (!(od.items[i].val > 10 && od.items[i].val < 200)) begin
|
||||
$display("FAIL: dyn items[%0d].val=%0d out of range", i, od.items[i].val);
|
||||
$stop;
|
||||
end
|
||||
if (od.items[i].tag == 0) begin
|
||||
$display("FAIL: dyn items[%0d].tag=%0d should be > 0", i, od.items[i].tag);
|
||||
$stop;
|
||||
end
|
||||
end
|
||||
|
||||
// === Test 2: Empty dynamic array (should succeed trivially) ===
|
||||
od = new(0);
|
||||
|
||||
if (od.randomize() with {
|
||||
foreach (items[i]) {
|
||||
items[i].val > 10;
|
||||
}
|
||||
} == 0) begin
|
||||
$display("FAIL: empty dyn randomize() returned 0");
|
||||
$stop;
|
||||
end
|
||||
|
||||
// === Test 3: Queue with inline foreach constraint ===
|
||||
oq = new(3);
|
||||
|
||||
if (oq.randomize() with {
|
||||
foreach (items[i]) {
|
||||
items[i].val > 50;
|
||||
items[i].val < 150;
|
||||
items[i].tag > 0;
|
||||
}
|
||||
} == 0) begin
|
||||
$display("FAIL: queue randomize() returned 0");
|
||||
$stop;
|
||||
end
|
||||
|
||||
foreach (oq.items[i]) begin
|
||||
if (!(oq.items[i].val > 50 && oq.items[i].val < 150)) begin
|
||||
$display("FAIL: queue items[%0d].val=%0d out of range", i, oq.items[i].val);
|
||||
$stop;
|
||||
end
|
||||
if (oq.items[i].tag == 0) begin
|
||||
$display("FAIL: queue items[%0d].tag=%0d should be > 0", i, oq.items[i].tag);
|
||||
$stop;
|
||||
end
|
||||
end
|
||||
|
||||
$write("*-* All Finished *-*\n");
|
||||
$finish;
|
||||
end
|
||||
endmodule
|
||||
Loading…
Reference in New Issue