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Remove black boxes for now.

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nella 2026-05-25 10:38:51 +02:00
parent b17792c451
commit 932be8c611
3 changed files with 6 additions and 86 deletions
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17
kernel/compressor_tree.h
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@ -47,14 +47,12 @@ 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_MOP_CSV, // black-box instance of \AddMopCsv
};
enum class FinalMode {
AUTO,
RIPPLE,
PREFIX,
ELARITH
};
inline std::pair<SigSpec, SigSpec> emit_compressor_32(Module *module, SigSpec a, SigSpec b, SigSpec c, int width)
@ -393,11 +391,10 @@ inline void emit_kogge_stone(Module *module, SigSpec a, SigSpec b, SigSpec y)
* @b: Signal B
* @y: Signal Y
* @choice: Adder type to instantiate
* @any_signed: Signed info for library macros
*
* Return: Cell* of the emitted instance
*/
inline Cell *emit_final_adder(Module *module, SigSpec a, SigSpec b, SigSpec y, FinalAdder choice, bool any_signed) {
inline Cell *emit_final_adder(Module *module, SigSpec a, SigSpec b, SigSpec y, FinalAdder choice) {
switch (choice) {
case FinalAdder::DEFAULT:
case FinalAdder::RIPPLE: {
@ -407,17 +404,6 @@ inline Cell *emit_final_adder(Module *module, SigSpec a, SigSpec b, SigSpec y, F
emit_kogge_stone(module, a, b, y);
return nullptr;
}
case FinalAdder::ELARITH_MOP_CSV: {
Cell *c = module->addCell(NEW_ID, IdString("\\AddMopCsv"));
int w = GetSize(y);
c->setParam(IdString("\\WIDTH"), w);
c->setParam(IdString("\\NUM_OPERANDS"), 2);
c->setParam(IdString("\\SIGNED"), any_signed ? 1 : 0);
c->setParam(IdString("\\SPEED"), Const("fast"));
c->setPort(IdString("\\Operands"), {a, b});
c->setPort(IdString("\\Sum"), y);
return c;
}
}
log_assert(false && "CompressorTree::emit_final_adder: invalid choice");
return nullptr;
@ -427,7 +413,6 @@ 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_MOP_CSV;
case FinalMode::AUTO:
default: return (width < RIPPLE_PREFIX_THRESHOLD) ? FinalAdder::DEFAULT : FinalAdder::PARALLEL_PREFIX;
}