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Remove elarith-fast for now.

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This commit is contained in:
nella 2026-05-19 10:39:01 +02:00
parent 749d6cd8f7
commit 536a117ede
2 changed files with 1 additions and 15 deletions
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15
kernel/compressor_tree.h
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@ -47,7 +47,6 @@ enum class FinalAdder {
DEFAULT, // emit $add and let downstream techmap pick
RIPPLE, // emit $add with explicit narrow hint
PARALLEL_PREFIX, // emit $add with PARALLEL_PREFIX
ELARITH_FAST, // black-box instance of \AddCfast
ELARITH_MOP_CSV, // black-box instance of \AddMopCsv
};
@ -328,19 +327,6 @@ inline Cell *emit_final_adder(Module *module, SigSpec a, SigSpec b, SigSpec y, F
c->set_string_attribute(ID(adder_arch), "parallel_prefix");
return c;
}
case FinalAdder::ELARITH_FAST: {
Cell *c = module->addCell(NEW_ID, IdString("\\AddCfast"));
int w = GetSize(y);
c->setParam(IdString("\\WIDTH"), w);
c->setParam(IdString("\\SPEED"), Const("fast"));
c->setParam(IdString("\\SIGNED"), any_signed ? 1 : 0);
c->setPort(IdString("\\A"), a);
c->setPort(IdString("\\B"), b);
c->setPort(IdString("\\Cin"), State::S0);
c->setPort(IdString("\\Sum"), y);
c->setPort(IdString("\\Cout"), module->addWire(NEW_ID));
return c;
}
case FinalAdder::ELARITH_MOP_CSV: {
Cell *c = module->addCell(NEW_ID, IdString("\\AddMopCsv"));
int w = GetSize(y);
@ -361,7 +347,6 @@ inline FinalAdder pick_final_adder(int width, FinalMode mode) {
switch (mode) {
case FinalMode::RIPPLE: return FinalAdder::RIPPLE;
case FinalMode::PREFIX: return FinalAdder::PARALLEL_PREFIX;
case FinalMode::ELARITH: return FinalAdder::ELARITH_FAST;
case FinalMode::AUTO:
default: return (width < RIPPLE_PREFIX_THRESHOLD) ? FinalAdder::DEFAULT : FinalAdder::PARALLEL_PREFIX;
}

1
passes/techmap/arith_tree.cc
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@ -353,6 +353,7 @@ struct ArithTreeWorker {
void emit_elarith_macro(std::vector<Operand> &operands, SigSpec result_y, int neg_compensation, bool any_signed, const char *desc)
{
// Multi operand
int width = GetSize(result_y);
auto pool = build_operand_pool(operands, width, neg_compensation);