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write_xaiger to inst each cell type once, do not call techmap/aigmap

This commit is contained in:
Eddie Hung 2019-12-06 17:06:10 -08:00
parent 98c9ea605b
commit f2ac36de4a
1 changed files with 25 additions and 21 deletions
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46
backends/aiger/xaiger.cc
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@ -605,15 +605,25 @@ struct XAigerWriter
RTLIL::Module *holes_module = module->design->addModule("$__holes__"); RTLIL::Module *holes_module = module->design->addModule("$__holes__");
log_assert(holes_module); log_assert(holes_module);
dict<IdString, Cell*> cell_cache;
int port_id = 1; int port_id = 1;
int box_count = 0; int box_count = 0;
for (auto cell : box_list) { for (auto cell : box_list) {
RTLIL::Module* box_module = module->design->module(cell->type); RTLIL::Module* box_module = module->design->module(cell->type);
log_assert(box_module);
IdString derived_name = box_module->derive(module->design, cell->parameters);
box_module = module->design->module(derived_name);
if (box_module->has_processes())
log_error("ABC9 box '%s' contains processes!\n", box_module->name.c_str());
int box_inputs = 0, box_outputs = 0; int box_inputs = 0, box_outputs = 0;
Cell *holes_cell = nullptr; auto r = cell_cache.insert(std::make_pair(derived_name, nullptr));
if (box_module->get_bool_attribute("\\whitebox")) { Cell *holes_cell = r.first->second;
if (r.second && !holes_cell && box_module->get_bool_attribute("\\whitebox")) {
holes_cell = holes_module->addCell(cell->name, cell->type); holes_cell = holes_module->addCell(cell->name, cell->type);
holes_cell->parameters = cell->parameters; holes_cell->parameters = cell->parameters;
r.first->second = holes_cell;
} }
// NB: Assume box_module->ports are sorted alphabetically // NB: Assume box_module->ports are sorted alphabetically
@ -622,8 +632,8 @@ struct XAigerWriter
RTLIL::Wire *w = box_module->wire(port_name); RTLIL::Wire *w = box_module->wire(port_name);
log_assert(w); log_assert(w);
RTLIL::Wire *holes_wire; RTLIL::Wire *holes_wire;
RTLIL::SigSpec port_wire; RTLIL::SigSpec port_sig;
if (w->port_input) { if (w->port_input)
for (int i = 0; i < GetSize(w); i++) { for (int i = 0; i < GetSize(w); i++) {
box_inputs++; box_inputs++;
holes_wire = holes_module->wire(stringf("\\i%d", box_inputs)); holes_wire = holes_module->wire(stringf("\\i%d", box_inputs));
@ -634,31 +644,33 @@ struct XAigerWriter
holes_module->ports.push_back(holes_wire->name); holes_module->ports.push_back(holes_wire->name);
} }
if (holes_cell) if (holes_cell)
port_wire.append(holes_wire); port_sig.append(holes_wire);
} }
if (!port_wire.empty())
holes_cell->setPort(w->name, port_wire);
}
if (w->port_output) { if (w->port_output) {
box_outputs += GetSize(w); box_outputs += GetSize(w);
for (int i = 0; i < GetSize(w); i++) { for (int i = 0; i < GetSize(w); i++) {
if (GetSize(w) == 1) if (GetSize(w) == 1)
holes_wire = holes_module->addWire(stringf("%s.%s", cell->name.c_str(), w->name.c_str())); holes_wire = holes_module->addWire(stringf("%s.%s", cell->name.c_str(), log_id(w->name)));
else else
holes_wire = holes_module->addWire(stringf("%s.%s[%d]", cell->name.c_str(), w->name.c_str(), i)); holes_wire = holes_module->addWire(stringf("%s.%s[%d]", cell->name.c_str(), log_id(w->name), i));
holes_wire->port_output = true; holes_wire->port_output = true;
holes_wire->port_id = port_id++; holes_wire->port_id = port_id++;
holes_module->ports.push_back(holes_wire->name); holes_module->ports.push_back(holes_wire->name);
if (holes_cell) if (holes_cell)
port_wire.append(holes_wire); port_sig.append(holes_wire);
else else
holes_module->connect(holes_wire, State::S0); holes_module->connect(holes_wire, State::S0);
} }
if (!port_wire.empty()) }
holes_cell->setPort(w->name, port_wire); if (!port_sig.empty()) {
if (r.second)
holes_cell->setPort(w->name, port_sig);
else
holes_module->connect(holes_cell->getPort(w->name), port_sig);
} }
} }
write_h_buffer(box_inputs); write_h_buffer(box_inputs);
write_h_buffer(box_outputs); write_h_buffer(box_outputs);
write_h_buffer(box_module->attributes.at("\\abc9_box_id").as_int()); write_h_buffer(box_module->attributes.at("\\abc9_box_id").as_int());
@ -685,16 +697,8 @@ struct XAigerWriter
RTLIL::Selection& sel = holes_module->design->selection_stack.back(); RTLIL::Selection& sel = holes_module->design->selection_stack.back();
sel.select(holes_module); sel.select(holes_module);
// TODO: Should not need to opt_merge if we only instantiate
// each box type once...
Pass::call(holes_module->design, "opt_merge -share_all");
Pass::call(holes_module->design, "flatten -wb"); Pass::call(holes_module->design, "flatten -wb");
// TODO: Should techmap/aigmap/check all lib_whitebox-es just once,
// instead of per write_xaiger call
Pass::call(holes_module->design, "techmap");
Pass::call(holes_module->design, "aigmap");
for (auto cell : holes_module->cells()) for (auto cell : holes_module->cells())
if (!cell->type.in("$_NOT_", "$_AND_")) if (!cell->type.in("$_NOT_", "$_AND_"))
log_error("Whitebox contents cannot be represented as AIG. Please verify whiteboxes are synthesisable.\n"); log_error("Whitebox contents cannot be represented as AIG. Please verify whiteboxes are synthesisable.\n");