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Merge pull request #5150 from YosysHQ/krys/aiger_ordering

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N. Engelhardt 2025-06-02 13:06:36 +00:00 • committed by GitHub
commit 1c742441db
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1 changed files with 49 additions and 25 deletions
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74
backends/aiger/aiger.cc
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@ -132,7 +132,7 @@ struct AigerWriter
return a;
}
AigerWriter(Module *module, bool zinit_mode, bool imode, bool omode, bool bmode, bool lmode) : module(module), zinit_mode(zinit_mode), sigmap(module)
AigerWriter(Module *module, bool no_sort, bool zinit_mode, bool imode, bool omode, bool bmode, bool lmode) : module(module), zinit_mode(zinit_mode), sigmap(module)
{
pool<SigBit> undriven_bits;
pool<SigBit> unused_bits;
@ -152,6 +152,37 @@ struct AigerWriter
if (wire->port_input)
sigmap.add(wire);
// handle ports
// provided the input_bits and output_bits don't get sorted they
// will be returned in reverse order, so add them in reverse to
// match
for (auto riter = module->ports.rbegin(); riter != module->ports.rend(); ++riter) {
auto *wire = module->wire(*riter);
for (int i = 0; i < GetSize(wire); i++)
{
SigBit wirebit(wire, i);
SigBit bit = sigmap(wirebit);
if (bit.wire == nullptr) {
if (wire->port_output) {
aig_map[wirebit] = (bit == State::S1) ? 1 : 0;
output_bits.insert(wirebit);
}
continue;
}
if (wire->port_input)
input_bits.insert(bit);
if (wire->port_output) {
if (bit != wirebit)
alias_map[wirebit] = bit;
output_bits.insert(wirebit);
}
}
}
// handle wires
for (auto wire : module->wires())
{
if (wire->attributes.count(ID::init)) {
@ -167,25 +198,13 @@ struct AigerWriter
SigBit wirebit(wire, i);
SigBit bit = sigmap(wirebit);
if (bit.wire == nullptr) {
if (wire->port_output) {
aig_map[wirebit] = (bit == State::S1) ? 1 : 0;
output_bits.insert(wirebit);
}
if (bit.wire == nullptr)
continue;
if (wire->port_input || wire->port_output)
continue;
}
undriven_bits.insert(bit);
unused_bits.insert(bit);
if (wire->port_input)
input_bits.insert(bit);
if (wire->port_output) {
if (bit != wirebit)
alias_map[wirebit] = bit;
output_bits.insert(wirebit);
}
}
if (wire->width == 1) {
@ -200,12 +219,6 @@ struct AigerWriter
}
}
for (auto bit : input_bits)
undriven_bits.erase(bit);
for (auto bit : output_bits)
unused_bits.erase(bit);
for (auto cell : module->cells())
{
if (cell->type == ID($_NOT_))
@ -343,8 +356,11 @@ struct AigerWriter
}
init_map.sort();
input_bits.sort();
output_bits.sort();
// we are relying here on unsorted pools iterating last-in-first-out
if (!no_sort) {
input_bits.sort();
output_bits.sort();
}
not_map.sort();
ff_map.sort();
and_map.sort();
@ -901,6 +917,9 @@ struct AigerBackend : public Backend {
log(" -symbols\n");
log(" include a symbol table in the generated AIGER file\n");
log("\n");
log(" -no-sort\n");
log(" don't sort input/output ports\n");
log("\n");
log(" -map <filename>\n");
log(" write an extra file with port and latch symbols\n");
log("\n");
@ -925,6 +944,7 @@ struct AigerBackend : public Backend {
bool zinit_mode = false;
bool miter_mode = false;
bool symbols_mode = false;
bool no_sort = false;
bool verbose_map = false;
bool imode = false;
bool omode = false;
@ -955,6 +975,10 @@ struct AigerBackend : public Backend {
symbols_mode = true;
continue;
}
if (args[argidx] == "-no-sort") {
no_sort = true;
continue;
}
if (map_filename.empty() && args[argidx] == "-map" && argidx+1 < args.size()) {
map_filename = args[++argidx];
continue;
@ -1008,7 +1032,7 @@ struct AigerBackend : public Backend {
if (!top_module->memories.empty())
log_error("Found unmapped memories in module %s: unmapped memories are not supported in AIGER backend!\n", log_id(top_module));
AigerWriter writer(top_module, zinit_mode, imode, omode, bmode, lmode);
AigerWriter writer(top_module, no_sort, zinit_mode, imode, omode, bmode, lmode);
writer.write_aiger(*f, ascii_mode, miter_mode, symbols_mode);
if (!map_filename.empty()) {