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Set abc_flop and use it in toposort

This commit is contained in:
Eddie Hung 2019-08-19 09:40:01 -07:00
parent 10c69f71e9
commit 9bfe924e17
2 changed files with 52 additions and 31 deletions
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1
frontends/aiger/aigerparse.cc
View File

@ -840,6 +840,7 @@ void AigerReader::post_process()
flop_count++;
cell->type = flop_module->name;
module->connect(q, d);
cell->set_bool_attribute("\\abc_flop");
continue;
}

70
passes/techmap/abc9.cc
View File

@ -443,6 +443,8 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
design->remove(design->module(ID($__abc9__)));
#endif
design->selection_stack.pop_back();
// Now 'unexpose' those wires by undoing
// the expose operation -- remove them from PO/PI
// and re-connecting them back together
@ -568,19 +570,17 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
dict<SigBit, std::vector<RTLIL::Cell*>> bit2sinks;
std::map<IdString, int> cell_stats;
for (auto c : mapped_mod->cells())
for (auto mapped_cell : mapped_mod->cells())
{
toposort.node(c->name);
toposort.node(mapped_cell->name);
RTLIL::Cell *cell = nullptr;
if (c->type == ID($_NOT_)) {
RTLIL::SigBit a_bit = c->getPort(ID(A));
RTLIL::SigBit y_bit = c->getPort(ID(Y));
bit_users[a_bit].insert(c->name);
bit_drivers[y_bit].insert(c->name);
if (mapped_cell->type == ID($_NOT_)) {
RTLIL::SigBit a_bit = mapped_cell->getPort(ID(A));
RTLIL::SigBit y_bit = mapped_cell->getPort(ID(Y));
if (!a_bit.wire) {
c->setPort(ID(Y), module->addWire(NEW_ID));
mapped_cell->setPort(ID(Y), module->addWire(NEW_ID));
RTLIL::Wire *wire = module->wire(remap_name(y_bit.wire->name));
log_assert(wire);
module->connect(RTLIL::SigBit(wire, y_bit.offset), State::S1);
@ -604,38 +604,40 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
if (!driving_lut) {
// If a driver couldn't be found (could be from PI or box CI)
// then implement using a LUT
cell = module->addLut(remap_name(stringf("%s$lut", c->name.c_str())),
cell = module->addLut(remap_name(stringf("%s$lut", mapped_cell->name.c_str())),
RTLIL::SigBit(module->wires_.at(remap_name(a_bit.wire->name)), a_bit.offset),
RTLIL::SigBit(module->wires_.at(remap_name(y_bit.wire->name)), y_bit.offset),
RTLIL::Const::from_string("01"));
bit2sinks[cell->getPort(ID(A))].push_back(cell);
cell_stats[ID($lut)]++;
bit_users[a_bit].insert(mapped_cell->name);
bit_drivers[y_bit].insert(mapped_cell->name);
}
else
not2drivers[c] = driving_lut;
not2drivers[mapped_cell] = driving_lut;
continue;
}
if (cell && markgroups) cell->attributes[ID(abcgroup)] = map_autoidx;
continue;
}
cell_stats[c->type]++;
cell_stats[mapped_cell->type]++;
RTLIL::Cell *existing_cell = nullptr;
if (c->type == ID($lut)) {
if (GetSize(c->getPort(ID(A))) == 1 && c->getParam(ID(LUT)) == RTLIL::Const::from_string("01")) {
SigSpec my_a = module->wires_.at(remap_name(c->getPort(ID(A)).as_wire()->name));
SigSpec my_y = module->wires_.at(remap_name(c->getPort(ID(Y)).as_wire()->name));
if (mapped_cell->type == ID($lut)) {
if (GetSize(mapped_cell->getPort(ID(A))) == 1 && mapped_cell->getParam(ID(LUT)) == RTLIL::Const::from_string("01")) {
SigSpec my_a = module->wires_.at(remap_name(mapped_cell->getPort(ID(A)).as_wire()->name));
SigSpec my_y = module->wires_.at(remap_name(mapped_cell->getPort(ID(Y)).as_wire()->name));
module->connect(my_y, my_a);
if (markgroups) c->attributes[ID(abcgroup)] = map_autoidx;
if (markgroups) mapped_cell->attributes[ID(abcgroup)] = map_autoidx;
log_abort();
continue;
}
cell = module->addCell(remap_name(c->name), c->type);
cell = module->addCell(remap_name(mapped_cell->name), mapped_cell->type);
}
else {
existing_cell = module->cell(c->name);
existing_cell = module->cell(mapped_cell->name);
log_assert(existing_cell);
cell = module->addCell(remap_name(c->name), c->type);
cell = module->addCell(remap_name(mapped_cell->name), mapped_cell->type);
module->swap_names(cell, existing_cell);
}
@ -652,10 +654,12 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
cell->parameters.erase(it);
}
else {
cell->parameters = c->parameters;
cell->attributes = c->attributes;
cell->parameters = mapped_cell->parameters;
cell->attributes = mapped_cell->attributes;
}
for (auto &conn : c->connections()) {
auto abc_flop = mapped_cell->attributes.count("\\abc_flop");
for (auto &conn : mapped_cell->connections()) {
RTLIL::SigSpec newsig;
for (auto c : conn.second.chunks()) {
if (c.width == 0)
@ -667,15 +671,17 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
}
cell->setPort(conn.first, newsig);
if (!abc_flop) {
if (cell->input(conn.first)) {
for (auto i : newsig)
bit2sinks[i].push_back(cell);
for (auto i : conn.second)
bit_users[i].insert(c->name);
bit_users[i].insert(mapped_cell->name);
}
if (cell->output(conn.first))
for (auto i : conn.second)
bit_drivers[i].insert(c->name);
bit_drivers[i].insert(mapped_cell->name);
}
}
}
@ -701,7 +707,7 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
}
for (auto &it : cell_stats)
log("ABC RESULTS: %15s cells: %8d\n", it.first.c_str(), it.second);
log("ABC RESULTS: %15s cells: %8d\n", log_id(it.first), it.second);
int in_wires = 0, out_wires = 0;
// Stitch in mapped_mod's inputs/outputs into module
@ -734,7 +740,21 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri
for (auto driver_cell : bit_drivers.at(it.first))
for (auto user_cell : it.second)
toposort.edge(driver_cell, user_cell);
#if 0
toposort.analyze_loops = true;
#endif
bool no_loops = toposort.sort();
#if 0
unsigned i = 0;
for (auto &it : toposort.loops) {
log(" loop %d\n", i++);
for (auto cell_name : it) {
auto cell = mapped_mod->cell(cell_name);
log_assert(cell);
log("\t%s (%s @ %s)\n", log_id(cell), log_id(cell->type), cell->get_src_attribute().c_str());
}
}
#endif
log_assert(no_loops);
for (auto ii = toposort.sorted.rbegin(); ii != toposort.sorted.rend(); ii++) {