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Allow extract_reduce to operate on xnors and single-bit word-wide operators

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This commit is contained in:
Akash Levy 2025-02-12 15:57:28 -08:00
parent cefce37e59
commit 610d4cc716
1 changed files with 23 additions and 5 deletions
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28
passes/techmap/extract_reduce.cc
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@ -29,7 +29,8 @@ struct ExtractReducePass : public Pass
enum GateType { enum GateType {
And, And,
Or, Or,
Xor Xor,
Xnor
}; };
ExtractReducePass() : Pass("extract_reduce", "converts gate chains into $reduce_* cells") { } ExtractReducePass() : Pass("extract_reduce", "converts gate chains into $reduce_* cells") { }
@ -60,7 +61,12 @@ struct ExtractReducePass : public Pass
{ {
return (cell->type == ID($_AND_) && gt == GateType::And) || return (cell->type == ID($_AND_) && gt == GateType::And) ||
(cell->type == ID($_OR_) && gt == GateType::Or) || (cell->type == ID($_OR_) && gt == GateType::Or) ||
(cell->type == ID($_XOR_) && gt == GateType::Xor); (cell->type == ID($_XOR_) && gt == GateType::Xor) ||
(cell->type == ID($_XNOR_) && gt == GateType::Xnor) ||
(cell->type == ID($and) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1 && gt == GateType::And) ||
(cell->type == ID($or) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1 && gt == GateType::Or) ||
(cell->type == ID($xor) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1 && gt == GateType::Xor) ||
(cell->type == ID($xnor) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1 && gt == GateType::Xnor);
} }
void execute(std::vector<std::string> args, RTLIL::Design *design) override void execute(std::vector<std::string> args, RTLIL::Design *design) override
@ -130,6 +136,16 @@ struct ExtractReducePass : public Pass
gt = GateType::Or; gt = GateType::Or;
else if (cell->type == ID($_XOR_)) else if (cell->type == ID($_XOR_))
gt = GateType::Xor; gt = GateType::Xor;
else if (cell->type == ID($_XNOR_))
gt = GateType::Xnor;
else if (cell->type == ID($and) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1)
gt = GateType::And;
else if (cell->type == ID($or) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1)
gt = GateType::Or;
else if (cell->type == ID($xor) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1)
gt = GateType::Xor;
else if (cell->type == ID($xnor) && cell->getParam(ID::A_WIDTH).as_int() == 1 && cell->getParam(ID::B_WIDTH).as_int() == 1 && cell->getParam(ID::Y_WIDTH).as_int() == 1)
gt = GateType::Xnor;
else else
continue; continue;
@ -269,12 +285,14 @@ struct ExtractReducePass : public Pass
input.append(it.first); input.append(it.first);
} }
if (head_cell->type == ID($_AND_)) { if (head_cell->type == ID($_AND_) || head_cell->type == ID($and)) {
module->addReduceAnd(NEW_ID2_SUFFIX("reduce_and"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming module->addReduceAnd(NEW_ID2_SUFFIX("reduce_and"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming
} else if (head_cell->type == ID($_OR_)) { } else if (head_cell->type == ID($_OR_) || head_cell->type == ID($or)) {
module->addReduceOr(NEW_ID2_SUFFIX("reduce_or"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming module->addReduceOr(NEW_ID2_SUFFIX("reduce_or"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming
} else if (head_cell->type == ID($_XOR_)) { } else if (head_cell->type == ID($_XOR_) || head_cell->type == ID($xor)) {
module->addReduceXor(NEW_ID2_SUFFIX("reduce_xor"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming module->addReduceXor(NEW_ID2_SUFFIX("reduce_xor"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming
} else if (head_cell->type == ID($_XNOR_) || head_cell->type == ID($xnor)) {
module->addReduceXnor(NEW_ID2_SUFFIX("reduce_xnor"), input, output, false, cell->get_src_attribute()); // SILIMATE: Improve the naming
} else { } else {
log_assert(false); log_assert(false);
} }