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Support multidimensional array access via VPI (#2812) (#5573)

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This commit is contained in:
Krzysztof Starecki
2025-01-09 19:04:26 -05:00
committed by GitHub
parent 052812bb87
commit 69dce205d3
15 changed files with 1101 additions and 493 deletions
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src/V3EmitCSyms.cpp
+14 -25
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@@ -929,21 +929,11 @@ void EmitCSyms::emitSymImp() {
checkSplit(true);
AstScope* const scopep = it->second.m_scopep;
AstVar* const varp = it->second.m_varp;
//
int pwidth = 1;
int pdim = 0;
int udim = 0;
string bounds;
if (AstBasicDType* const basicp = varp->basicp()) {
// Range is always first, it's not in "C" order
if (basicp->isRanged()) {
bounds += " ,";
bounds += cvtToStr(basicp->hi());
bounds += ",";
bounds += cvtToStr(basicp->lo());
pdim++;
pwidth *= basicp->elements();
}
for (AstNodeDType* dtypep = varp->dtypep(); dtypep;) {
dtypep
= dtypep->skipRefp(); // Skip AstRefDType/AstTypedef, or return same node
@@ -952,28 +942,25 @@ void EmitCSyms::emitSymImp() {
bounds += cvtToStr(adtypep->left());
bounds += ",";
bounds += cvtToStr(adtypep->right());
if (VN_IS(dtypep, PackArrayDType)) {
if (VN_IS(dtypep, PackArrayDType))
pdim++;
pwidth *= adtypep->elementsConst();
} else {
else
udim++;
}
dtypep = adtypep->subDTypep();
} else {
if (basicp->isRanged()) {
bounds += " ,";
bounds += cvtToStr(basicp->hi());
bounds += ",";
bounds += cvtToStr(basicp->lo());
pdim++;
}
break; // AstBasicDType - nothing below, 1
}
}
}
// TODO: actually expose packed arrays as vpiRegArray
if (pdim > 1 && udim == 0) {
bounds = ", ";
bounds += cvtToStr(pwidth - 1);
bounds += ",0";
pdim = 1;
}
if (pdim > 1 || udim > 1) {
puts("//UNSUP "); // VerilatedImp can't deal with >2d or packed arrays
}
putns(scopep, protect("__Vscope_" + it->second.m_scopeName));
putns(varp, ".varInsert(__Vfinal,");
putsQuoted(protect(it->second.m_varBasePretty));
@@ -1005,7 +992,9 @@ void EmitCSyms::emitSymImp() {
puts(",");
puts(varp->vlEnumDir()); // VLVD_IN etc
puts(",");
puts(cvtToStr(pdim + udim));
puts(cvtToStr(udim));
puts(",");
puts(cvtToStr(pdim));
puts(bounds);
puts(");\n");
++m_numStmts;