From 7532416cd7a8c3fb41592c6677a30e0dad53813c Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Wed, 8 Jan 2020 18:27:09 -0800 Subject: write_xaiger: cleanup holes generation --- backends/aiger/xaiger.cc | 169 +++++++++++++++++++++++++---------------------- 1 file changed, 89 insertions(+), 80 deletions(-) (limited to 'backends/aiger') diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc index 4cbf49baf..b6a7dbac2 100644 --- a/backends/aiger/xaiger.cc +++ b/backends/aiger/xaiger.cc @@ -407,7 +407,7 @@ struct XAigerWriter } if (w->port_output) { RTLIL::SigSpec rhs; - auto it = cell->connections_.find(w->name); + auto it = cell->connections_.find(port_name); if (it != cell->connections_.end()) { if (GetSize(it->second) < GetSize(w)) it->second.append(module->addWire(NEW_ID, GetSize(w)-GetSize(it->second))); @@ -614,7 +614,7 @@ struct XAigerWriter RTLIL::Module *holes_module = module->design->addModule("$__holes__"); log_assert(holes_module); - dict cell_cache; + dict> cell_cache; int port_id = 1; int box_count = 0; @@ -623,86 +623,94 @@ struct XAigerWriter log_assert(orig_box_module); IdString derived_name = orig_box_module->derive(module->design, cell->parameters); RTLIL::Module* box_module = module->design->module(derived_name); - if (box_module->has_processes()) - Pass::call_on_module(module->design, box_module, "proc"); - - bool whitebox = box_module->get_bool_attribute("\\whitebox"); - auto r = cell_cache.insert(std::make_pair(derived_name, nullptr)); - Cell *holes_cell = r.first->second; - if (r.second && whitebox) { - holes_cell = holes_module->addCell(cell->name, cell->type); - holes_cell->parameters = cell->parameters; - r.first->second = holes_cell; - } - int box_inputs = 0, box_outputs = 0; - for (auto port_name : box_ports.at(cell->type)) { - RTLIL::Wire *w = box_module->wire(port_name); - log_assert(w); - RTLIL::Wire *holes_wire; - RTLIL::SigSpec port_sig; - - if (w->port_input) { - if (whitebox) - for (int i = 0; i < GetSize(w); i++) { - box_inputs++; - holes_wire = holes_module->wire(stringf("\\i%d", box_inputs)); - if (!holes_wire) { - holes_wire = holes_module->addWire(stringf("\\i%d", box_inputs)); - holes_wire->port_input = true; - holes_wire->port_id = port_id++; - holes_module->ports.push_back(holes_wire->name); + auto r = cell_cache.insert(derived_name); + auto &v = r.first->second; + if (r.second) { + if (box_module->has_processes()) + Pass::call_on_module(module->design, box_module, "proc"); + + int box_inputs = 0, box_outputs = 0; + if (box_module->get_bool_attribute("\\whitebox")) { + auto holes_cell = holes_module->addCell(cell->name, derived_name); + for (auto port_name : box_ports.at(cell->type)) { + RTLIL::Wire *w = box_module->wire(port_name); + log_assert(w); + log_assert(!w->port_input || !w->port_output); + auto &conn = holes_cell->connections_[port_name]; + if (w->port_input) { + for (int i = 0; i < GetSize(w); i++) { + box_inputs++; + RTLIL::Wire *holes_wire = holes_module->wire(stringf("\\i%d", box_inputs)); + if (!holes_wire) { + holes_wire = holes_module->addWire(stringf("\\i%d", box_inputs)); + holes_wire->port_input = true; + holes_wire->port_id = port_id++; + holes_module->ports.push_back(holes_wire->name); + } + conn.append(holes_wire); } - if (holes_cell) - port_sig.append(holes_wire); } - else - box_inputs += GetSize(w); - } - if (w->port_output) { - box_outputs += GetSize(w); - for (int i = 0; i < GetSize(w); i++) { - if (GetSize(w) == 1) - holes_wire = holes_module->addWire(stringf("$abc%s.%s", cell->name.c_str(), log_id(w->name))); - else - holes_wire = holes_module->addWire(stringf("$abc%s.%s[%d]", cell->name.c_str(), log_id(w->name), i)); - holes_wire->port_output = true; - holes_wire->port_id = port_id++; - holes_module->ports.push_back(holes_wire->name); - if (holes_cell) - port_sig.append(holes_wire); - else - holes_module->connect(holes_wire, State::S0); + else if (w->port_output) { + box_outputs += GetSize(w); + conn = holes_module->addWire(stringf("%s.%s", derived_name.c_str(), log_id(port_name)), GetSize(w)); + } } + + // For flops only, create an extra 1-bit input that drives a new wire + // called ".abc9_ff.Q" that is used below + if (box_module->get_bool_attribute("\\abc9_flop")) { + box_inputs++; + Wire *holes_wire = holes_module->wire(stringf("\\i%d", box_inputs)); + if (!holes_wire) { + holes_wire = holes_module->addWire(stringf("\\i%d", box_inputs)); + holes_wire->port_input = true; + holes_wire->port_id = port_id++; + holes_module->ports.push_back(holes_wire->name); + } + Wire *Q = holes_module->addWire(stringf("%s.abc9_ff.Q", cell->name.c_str())); + holes_module->connect(Q, holes_wire); + } + + std::get<0>(v) = holes_cell; } - 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); + else { + for (auto port_name : box_ports.at(cell->type)) { + RTLIL::Wire *w = box_module->wire(port_name); + log_assert(w); + log_assert(!w->port_input || !w->port_output); + if (w->port_input) + box_inputs += GetSize(w); + else if (w->port_output) + box_outputs += GetSize(w); + } + log_assert(std::get<0>(v) == nullptr); } + + std::get<1>(v) = box_inputs; + std::get<2>(v) = box_outputs; + std::get<3>(v) = box_module->attributes.at("\\abc9_box_id").as_int(); } - // For flops only, create an extra 1-bit input that drives a new wire - // called ".abc9_ff.Q" that is used below - if (box_module->get_bool_attribute("\\abc9_flop")) { - log_assert(holes_cell); - - box_inputs++; - Wire *holes_wire = holes_module->wire(stringf("\\i%d", box_inputs)); - if (!holes_wire) { - holes_wire = holes_module->addWire(stringf("\\i%d", box_inputs)); - holes_wire->port_input = true; - holes_wire->port_id = port_id++; - holes_module->ports.push_back(holes_wire->name); - } - Wire *w = holes_module->addWire(stringf("%s.abc9_ff.Q", cell->name.c_str())); - holes_module->connect(w, holes_wire); + auto holes_cell = std::get<0>(v); + for (auto port_name : box_ports.at(cell->type)) { + RTLIL::Wire *w = box_module->wire(port_name); + log_assert(w); + if (!w->port_output) + continue; + Wire *holes_wire = holes_module->addWire(stringf("$abc%s.%s", cell->name.c_str(), log_id(port_name)), GetSize(w)); + holes_wire->port_output = true; + holes_wire->port_id = port_id++; + holes_module->ports.push_back(holes_wire->name); + if (holes_cell) // whitebox + holes_module->connect(holes_wire, holes_cell->getPort(port_name)); + else // blackbox + holes_module->connect(holes_wire, Const(State::S0, GetSize(w))); } - write_h_buffer(box_inputs); - write_h_buffer(box_outputs); - write_h_buffer(box_module->attributes.at("\\abc9_box_id").as_int()); + write_h_buffer(std::get<1>(v)); + write_h_buffer(std::get<2>(v)); + write_h_buffer(std::get<3>(v)); write_h_buffer(box_count++); } @@ -762,14 +770,14 @@ struct XAigerWriter // created a new $paramod ... Pass::call_on_module(holes_module->design, holes_module, "flatten -wb; techmap; aigmap"); - dict replace; + dict replace; for (auto it = holes_module->cells_.begin(); it != holes_module->cells_.end(); ) { auto cell = it->second; if (cell->type.in("$_DFF_N_", "$_DFF_NN0_", "$_DFF_NN1_", "$_DFF_NP0_", "$_DFF_NP1_", "$_DFF_P_", "$_DFF_PN0_", "$_DFF_PN1", "$_DFF_PP0_", "$_DFF_PP1_")) { SigBit D = cell->getPort("\\D"); SigBit Q = cell->getPort("\\Q"); - // Remove the DFF cell from what needs to be a combinatorial box + // Remove the $_DFF_* cell from what needs to be a combinatorial box it = holes_module->cells_.erase(it); Wire *port; if (GetSize(Q.wire) == 1) @@ -777,10 +785,10 @@ struct XAigerWriter else port = holes_module->wire(stringf("$abc%s[%d]", Q.wire->name.c_str(), Q.offset)); log_assert(port); - // Prepare to replace "assign = DFF.Q;" with "assign = DFF.D;" - // in order to extract the combinatorial control logic that feeds the box + // Prepare to replace "assign = $_DFF_*.Q;" with "assign = $_DFF_*.D;" + // in order to extract just the combinatorial control logic that feeds the box // (i.e. clock enable, synchronous reset, etc.) - replace.insert(std::make_pair(SigSig(port,Q), SigSig(port,D))); + replace.insert(std::make_pair(Q,D)); // Since `flatten` above would have created wires named ".Q", // extract the pre-techmap cell name auto pos = Q.wire->name.str().rfind("."); @@ -788,7 +796,7 @@ struct XAigerWriter IdString driver = Q.wire->name.substr(0, pos); // And drive the signal that was previously driven by "DFF.Q" (typically // used to implement clock-enable functionality) with the ".abc9_ff.Q" - // wire (which itself is driven an input port) we inserted above + // wire (which itself is driven by an input port) we inserted above Wire *currQ = holes_module->wire(stringf("%s.abc9_ff.Q", driver.c_str())); log_assert(currQ); holes_module->connect(Q, currQ); @@ -799,10 +807,11 @@ struct XAigerWriter ++it; } + SigMap holes_sigmap(holes_module); for (auto &conn : holes_module->connections_) { - auto it = replace.find(conn); + auto it = replace.find(sigmap(conn.second)); if (it != replace.end()) - conn = it->second; + conn.second = it->second; } // Move into a new (temporary) design so that "clean" will only -- cgit v1.2.3