luke/verilator
1
0
Fork 0
mirror of https://github.com/verilator/verilator.git synced 2026-09-06 00:47:26 +02:00
Code Issues Packages Projects Releases Wiki Activity

Support associative array basic constrained randomization (#5658) (#5670)

Browse Source
This commit is contained in:
Yilou Wang
2024-12-12 11:31:54 -05:00
committed by GitHub
parent 32f9cf072b
commit 54ef9ad31c
11 changed files with 441 additions and 101 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/V3Randomize.cpp
+40 -2
View File
@@ -641,7 +641,7 @@ class ConstraintExprVisitor final : public VNVisitor {
"write_var"};
uint32_t dimension = 0;
if (VN_IS(varp->dtypep(), UnpackArrayDType) || VN_IS(varp->dtypep(), DynArrayDType)
|| VN_IS(varp->dtypep(), QueueDType)) {
|| VN_IS(varp->dtypep(), QueueDType) || VN_IS(varp->dtypep(), AssocArrayDType)) {
const std::pair<uint32_t, uint32_t> dims
= varp->dtypep()->dimensions(/*includeBasic=*/true);
const uint32_t unpackedDimensions = dims.second;
@@ -656,7 +656,7 @@ class ConstraintExprVisitor final : public VNVisitor {
size_t width = varp->width();
AstNodeDType* tmpDtypep = varp->dtypep();
while (VN_IS(tmpDtypep, UnpackArrayDType) || VN_IS(tmpDtypep, DynArrayDType)
|| VN_IS(tmpDtypep, QueueDType))
|| VN_IS(tmpDtypep, QueueDType) || VN_IS(tmpDtypep, AssocArrayDType))
tmpDtypep = tmpDtypep->subDTypep();
width = tmpDtypep->width();
methodp->addPinsp(
@@ -724,6 +724,44 @@ class ConstraintExprVisitor final : public VNVisitor {
editSMT(nodep, nodep->fromp(), lsbp, msbp);
}
void visit(AstAssocSel* nodep) override {
if (editFormat(nodep)) return;
FileLine* const fl = nodep->fileline();
if (VN_IS(nodep->bitp(), CvtPackString)) {
// Extract and truncate the string index to fit within 64 bits
AstCvtPackString* const stringp = VN_AS(nodep->bitp(), CvtPackString);
VNRelinker handle;
AstNodeExpr* const strIdxp = new AstSFormatF{
fl, "#x%16x", false,
new AstAnd{fl, stringp->lhsp()->unlinkFrBack(&handle),
new AstConst(fl, AstConst::Unsized64{}, 0xFFFFFFFFFFFFFFFF)}};
handle.relink(strIdxp);
editSMT(nodep, nodep->fromp(), strIdxp);
} else {
VNRelinker handle;
const int actual_width = nodep->bitp()->width();
std::string fmt;
// Normalize to standard bit width
if (actual_width <= 8) {
fmt = "#x%2x";
} else if (actual_width <= 16) {
fmt = "#x%4x";
} else if (actual_width <= 32) {
fmt = "#x%8x";
} else if (actual_width <= 64) {
fmt = "#x%16x";
} else {
nodep->v3warn(CONSTRAINTIGN,
"Unsupported: Associative array index "
"widths of more than 64 bits during constraint randomization.");
return;
}
AstNodeExpr* const idxp
= new AstSFormatF{fl, fmt, false, nodep->bitp()->unlinkFrBack(&handle)};
handle.relink(idxp);
editSMT(nodep, nodep->fromp(), idxp);
}
}
void visit(AstArraySel* nodep) override {
if (editFormat(nodep)) return;
FileLine* const fl = nodep->fileline();