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Get rid of normalize_to_width.

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nella 2026-06-11 01:12:35 +02:00
parent c44d24d9fd
commit 135c2a4113
3 changed files with 8 additions and 27 deletions
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23
kernel/compressor_tree.cc
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@ -43,23 +43,6 @@ std::pair<SigSpec, SigSpec> emit_compressor_42(Module *module, SigSpec a, SigSpe
return {sum, carry};
}
SigSpec normalize_to_width(SigSpec sig, bool is_signed, int width)
{
// Zero/sign-extend to width
if (GetSize(sig) < width) {
SigBit pad;
if (is_signed && GetSize(sig) > 0)
pad = sig[GetSize(sig) - 1];
else
pad = State::S0;
sig.append(SigSpec(pad, width - GetSize(sig)));
}
// Truncate to width
if (GetSize(sig) > width)
sig = sig.extract(0, width);
return sig;
}
std::vector<DepthSig> generate_partial_products(Module *module, SigSpec a, SigSpec b, bool a_signed, bool b_signed, int width) {
int width_a = GetSize(a);
int width_b = GetSize(b);
@ -72,7 +55,7 @@ std::vector<DepthSig> generate_partial_products(Module *module, SigSpec a, SigSp
// b_shifted = (0_i ## b)
SigSpec b_shifted = SigSpec(State::S0, i);
b_shifted.append(b);
b_shifted = normalize_to_width(b_shifted, false, width);
b_shifted.extend_u0(width, false);
// row = b_shifted & replicate(a[i], width)
SigSpec ai_rep = SigSpec(ai, width);
@ -333,8 +316,8 @@ FinalAdder pick_final_adder(int width, int final_depth, FinalMode mode) {
case FinalMode::PREFIX: return FinalAdder::PARALLEL_PREFIX;
case FinalMode::AUTO:
default: {
bool wide = width >= RIPPLE_PREFIX_THRESHOLD;
bool deep = final_depth >= PREFIX_DEPTH_THRESHOLD;
bool wide = width >= RIPPLE_PREFIX_WIDTH_THRESHOLD;
bool deep = final_depth >= RIPPLE_PREFIX_DEPTH_THRESHOLD;
return (wide && deep) ? FinalAdder::PARALLEL_PREFIX : FinalAdder::DEFAULT;
}
}