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bufnorm: preserve constant bits driving wires

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This commit is contained in:
George Rennie
2024-11-07 11:48:48 +01:00
parent 2de9f00368
commit 8f6058a7d6
1 changed files with 7 additions and 2 deletions
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9
passes/techmap/bufnorm.cc
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@@ -438,8 +438,13 @@ struct BufnormPass : public Pass {
bool chain_this_wire = chain_this_wire_f(wire);
SigSpec keysig = sigmap(wire), insig = wire, outsig = wire;
for (int i = 0; i < GetSize(insig); i++)
insig[i] = mapped_bits.at(keysig[i], State::Sx);
for (int i = 0; i < GetSize(insig); i++) {
if (keysig[i].is_wire())
insig[i] = mapped_bits.at(keysig[i], State::Sx);
else
insig[i] = keysig[i];
}
if (chain_this_wire) {
for (int i = 0; i < GetSize(outsig); i++)
mapped_bits[keysig[i]] = outsig[i];