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VPI memory access for packed arrays (#2922)

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This commit is contained in:
Todd Strader
2021-05-07 07:17:54 -04:00
committed by GitHub
parent 44fd205e12
commit b2139f65d8
6 changed files with 128 additions and 91 deletions
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src/V3EmitCSyms.cpp
+11 -2
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@@ -762,6 +762,7 @@ void EmitCSyms::emitSymImp() {
AstScope* scopep = it->second.m_scopep;
AstVar* varp = it->second.m_varp;
//
int pwidth = 1;
int pdim = 0;
int udim = 0;
string bounds;
@@ -773,6 +774,7 @@ void EmitCSyms::emitSymImp() {
bounds += ",";
bounds += cvtToStr(basicp->lo());
pdim++;
pwidth *= basicp->elements();
}
for (AstNodeDType* dtypep = varp->dtypep(); dtypep;) {
dtypep
@@ -784,6 +786,7 @@ void EmitCSyms::emitSymImp() {
bounds += cvtToStr(adtypep->right());
if (VN_IS(dtypep, PackArrayDType)) {
pdim++;
pwidth *= adtypep->elementsConst();
} else {
udim++;
}
@@ -793,8 +796,14 @@ void EmitCSyms::emitSymImp() {
}
}
}
//
if (udim > 1 && (pdim && udim)) {
// 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
}
puts(protect("__Vscope_" + it->second.m_scopeName) + ".varInsert(__Vfinal,");