diff options
Diffstat (limited to 'passes/opt')
| -rw-r--r-- | passes/opt/Makefile.inc | 6 | ||||
| -rw-r--r-- | passes/opt/muxpack.cc | 368 | ||||
| -rw-r--r-- | passes/opt/opt.cc | 17 | ||||
| -rw-r--r-- | passes/opt/opt_clean.cc | 251 | ||||
| -rw-r--r-- | passes/opt/opt_demorgan.cc | 28 | ||||
| -rw-r--r-- | passes/opt/opt_expr.cc | 1121 | ||||
| -rw-r--r-- | passes/opt/opt_lut.cc | 595 | ||||
| -rw-r--r-- | passes/opt/opt_mem.cc | 143 | ||||
| -rw-r--r-- | passes/opt/opt_merge.cc | 112 | ||||
| -rw-r--r-- | passes/opt/opt_muxtree.cc | 78 | ||||
| -rw-r--r-- | passes/opt/opt_reduce.cc | 119 | ||||
| -rw-r--r-- | passes/opt/opt_rmdff.cc | 422 | ||||
| -rw-r--r-- | passes/opt/opt_share.cc | 657 | ||||
| -rw-r--r-- | passes/opt/pmux2shiftx.cc | 860 | ||||
| -rw-r--r-- | passes/opt/rmports.cc | 6 | ||||
| -rw-r--r-- | passes/opt/share.cc | 354 | ||||
| -rw-r--r-- | passes/opt/wreduce.cc | 292 |
17 files changed, 4359 insertions, 1070 deletions
diff --git a/passes/opt/Makefile.inc b/passes/opt/Makefile.inc index 0d01e9d35..002c1a6a1 100644 --- a/passes/opt/Makefile.inc +++ b/passes/opt/Makefile.inc @@ -1,9 +1,11 @@ OBJS += passes/opt/opt.o OBJS += passes/opt/opt_merge.o +OBJS += passes/opt/opt_mem.o OBJS += passes/opt/opt_muxtree.o OBJS += passes/opt/opt_reduce.o OBJS += passes/opt/opt_rmdff.o +OBJS += passes/opt/opt_share.o OBJS += passes/opt/opt_clean.o OBJS += passes/opt/opt_expr.o @@ -12,5 +14,7 @@ OBJS += passes/opt/share.o OBJS += passes/opt/wreduce.o OBJS += passes/opt/opt_demorgan.o OBJS += passes/opt/rmports.o +OBJS += passes/opt/opt_lut.o +OBJS += passes/opt/pmux2shiftx.o +OBJS += passes/opt/muxpack.o endif - diff --git a/passes/opt/muxpack.cc b/passes/opt/muxpack.cc new file mode 100644 index 000000000..c40c02acd --- /dev/null +++ b/passes/opt/muxpack.cc @@ -0,0 +1,368 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at> + * 2019 Eddie Hung <eddie@fpgeh.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/yosys.h" +#include "kernel/sigtools.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +struct ExclusiveDatabase +{ + Module *module; + const SigMap &sigmap; + + dict<SigBit, std::pair<SigSpec,std::vector<Const>>> sig_cmp_prev; + + ExclusiveDatabase(Module *module, const SigMap &sigmap) : module(module), sigmap(sigmap) + { + SigSpec const_sig, nonconst_sig; + SigBit y_port; + pool<Cell*> reduce_or; + for (auto cell : module->cells()) { + if (cell->type == ID($eq)) { + nonconst_sig = sigmap(cell->getPort(ID::A)); + const_sig = sigmap(cell->getPort(ID::B)); + if (!const_sig.is_fully_const()) { + if (!nonconst_sig.is_fully_const()) + continue; + std::swap(nonconst_sig, const_sig); + } + y_port = sigmap(cell->getPort(ID::Y)); + } + else if (cell->type == ID($logic_not)) { + nonconst_sig = sigmap(cell->getPort(ID::A)); + const_sig = Const(State::S0, GetSize(nonconst_sig)); + y_port = sigmap(cell->getPort(ID::Y)); + } + else if (cell->type == ID($reduce_or)) { + reduce_or.insert(cell); + continue; + } + else continue; + + log_assert(!nonconst_sig.empty()); + log_assert(!const_sig.empty()); + sig_cmp_prev[y_port] = std::make_pair(nonconst_sig,std::vector<Const>{const_sig.as_const()}); + } + + for (auto cell : reduce_or) { + nonconst_sig = SigSpec(); + std::vector<Const> values; + SigSpec a_port = sigmap(cell->getPort(ID::A)); + for (auto bit : a_port) { + auto it = sig_cmp_prev.find(bit); + if (it == sig_cmp_prev.end()) { + nonconst_sig = SigSpec(); + break; + } + if (nonconst_sig.empty()) + nonconst_sig = it->second.first; + else if (nonconst_sig != it->second.first) { + nonconst_sig = SigSpec(); + break; + } + for (auto value : it->second.second) + values.push_back(value); + } + if (nonconst_sig.empty()) + continue; + y_port = sigmap(cell->getPort(ID::Y)); + sig_cmp_prev[y_port] = std::make_pair(nonconst_sig,std::move(values)); + } + } + + bool query(const SigSpec &sig) const + { + SigSpec nonconst_sig; + pool<Const> const_values; + + for (auto bit : sig.bits()) { + auto it = sig_cmp_prev.find(bit); + if (it == sig_cmp_prev.end()) + return false; + + if (nonconst_sig.empty()) + nonconst_sig = it->second.first; + else if (nonconst_sig != it->second.first) + return false; + + for (auto value : it->second.second) + if (!const_values.insert(value).second) + return false; + } + + return true; + } +}; + + +struct MuxpackWorker +{ + Module *module; + SigMap sigmap; + + int mux_count, pmux_count; + + pool<Cell*> remove_cells; + + dict<SigSpec, Cell*> sig_chain_next; + dict<SigSpec, Cell*> sig_chain_prev; + pool<SigBit> sigbit_with_non_chain_users; + pool<Cell*> chain_start_cells; + pool<Cell*> candidate_cells; + + ExclusiveDatabase excl_db; + + void make_sig_chain_next_prev() + { + for (auto wire : module->wires()) + { + if (wire->port_output || wire->get_bool_attribute(ID::keep)) { + for (auto bit : sigmap(wire)) + sigbit_with_non_chain_users.insert(bit); + } + } + + for (auto cell : module->cells()) + { + if (cell->type.in(ID($mux), ID($pmux)) && !cell->get_bool_attribute(ID::keep)) + { + SigSpec a_sig = sigmap(cell->getPort(ID::A)); + SigSpec b_sig; + if (cell->type == ID($mux)) + b_sig = sigmap(cell->getPort(ID::B)); + SigSpec y_sig = sigmap(cell->getPort(ID::Y)); + + if (sig_chain_next.count(a_sig)) + for (auto a_bit : a_sig.bits()) + sigbit_with_non_chain_users.insert(a_bit); + else { + sig_chain_next[a_sig] = cell; + candidate_cells.insert(cell); + } + + if (!b_sig.empty()) { + if (sig_chain_next.count(b_sig)) + for (auto b_bit : b_sig.bits()) + sigbit_with_non_chain_users.insert(b_bit); + else { + sig_chain_next[b_sig] = cell; + candidate_cells.insert(cell); + } + } + + sig_chain_prev[y_sig] = cell; + continue; + } + + for (auto conn : cell->connections()) + if (cell->input(conn.first)) + for (auto bit : sigmap(conn.second)) + sigbit_with_non_chain_users.insert(bit); + } + } + + void find_chain_start_cells() + { + for (auto cell : candidate_cells) + { + log_debug("Considering %s (%s)\n", log_id(cell), log_id(cell->type)); + + SigSpec a_sig = sigmap(cell->getPort(ID::A)); + if (cell->type == ID($mux)) { + SigSpec b_sig = sigmap(cell->getPort(ID::B)); + if (sig_chain_prev.count(a_sig) + sig_chain_prev.count(b_sig) != 1) + goto start_cell; + + if (!sig_chain_prev.count(a_sig)) + a_sig = b_sig; + } + else if (cell->type == ID($pmux)) { + if (!sig_chain_prev.count(a_sig)) + goto start_cell; + } + else log_abort(); + + for (auto bit : a_sig.bits()) + if (sigbit_with_non_chain_users.count(bit)) + goto start_cell; + + { + Cell *prev_cell = sig_chain_prev.at(a_sig); + log_assert(prev_cell); + SigSpec s_sig = sigmap(cell->getPort(ID(S))); + s_sig.append(sigmap(prev_cell->getPort(ID(S)))); + if (!excl_db.query(s_sig)) + goto start_cell; + } + + continue; + + start_cell: + chain_start_cells.insert(cell); + } + } + + vector<Cell*> create_chain(Cell *start_cell) + { + vector<Cell*> chain; + + Cell *c = start_cell; + while (c != nullptr) + { + chain.push_back(c); + + SigSpec y_sig = sigmap(c->getPort(ID::Y)); + + if (sig_chain_next.count(y_sig) == 0) + break; + + c = sig_chain_next.at(y_sig); + if (chain_start_cells.count(c) != 0) + break; + } + + return chain; + } + + void process_chain(vector<Cell*> &chain) + { + if (GetSize(chain) < 2) + return; + + int cursor = 0; + while (cursor < GetSize(chain)) + { + int cases = GetSize(chain) - cursor; + + Cell *first_cell = chain[cursor]; + dict<int, SigBit> taps_dict; + + if (cases < 2) { + cursor++; + continue; + } + + Cell *last_cell = chain[cursor+cases-1]; + + log("Converting %s.%s ... %s.%s to a pmux with %d cases.\n", + log_id(module), log_id(first_cell), log_id(module), log_id(last_cell), cases); + + mux_count += cases; + pmux_count += 1; + + first_cell->type = ID($pmux); + SigSpec b_sig = first_cell->getPort(ID::B); + SigSpec s_sig = first_cell->getPort(ID(S)); + + for (int i = 1; i < cases; i++) { + Cell* prev_cell = chain[cursor+i-1]; + Cell* cursor_cell = chain[cursor+i]; + if (sigmap(prev_cell->getPort(ID::Y)) == sigmap(cursor_cell->getPort(ID::A))) { + b_sig.append(cursor_cell->getPort(ID::B)); + s_sig.append(cursor_cell->getPort(ID(S))); + } + else { + log_assert(cursor_cell->type == ID($mux)); + b_sig.append(cursor_cell->getPort(ID::A)); + s_sig.append(module->LogicNot(NEW_ID, cursor_cell->getPort(ID(S)))); + } + remove_cells.insert(cursor_cell); + } + + first_cell->setPort(ID::B, b_sig); + first_cell->setPort(ID(S), s_sig); + first_cell->setParam(ID(S_WIDTH), GetSize(s_sig)); + first_cell->setPort(ID::Y, last_cell->getPort(ID::Y)); + + cursor += cases; + } + } + + void cleanup() + { + for (auto cell : remove_cells) + module->remove(cell); + + remove_cells.clear(); + sig_chain_next.clear(); + sig_chain_prev.clear(); + chain_start_cells.clear(); + candidate_cells.clear(); + } + + MuxpackWorker(Module *module) : + module(module), sigmap(module), mux_count(0), pmux_count(0), excl_db(module, sigmap) + { + make_sig_chain_next_prev(); + find_chain_start_cells(); + + for (auto c : chain_start_cells) { + vector<Cell*> chain = create_chain(c); + process_chain(chain); + } + + cleanup(); + } +}; + +struct MuxpackPass : public Pass { + MuxpackPass() : Pass("muxpack", "$mux/$pmux cascades to $pmux") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" muxpack [selection]\n"); + log("\n"); + log("This pass converts cascaded chains of $pmux cells (e.g. those create from case\n"); + log("constructs) and $mux cells (e.g. those created by if-else constructs) into\n"); + log("$pmux cells.\n"); + log("\n"); + log("This optimisation is conservative --- it will only pack $mux or $pmux cells\n"); + log("whose select lines are driven by '$eq' cells with other such cells if it can be\n"); + log("certain that their select inputs are mutually exclusive.\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + log_header(design, "Executing MUXPACK pass ($mux cell cascades to $pmux).\n"); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) + { + break; + } + extra_args(args, argidx, design); + + int mux_count = 0; + int pmux_count = 0; + + for (auto module : design->selected_modules()) { + MuxpackWorker worker(module); + mux_count += worker.mux_count; + pmux_count += worker.pmux_count; + } + + log("Converted %d (p)mux cells into %d pmux cells.\n", mux_count, pmux_count); + } +} MuxpackPass; + +PRIVATE_NAMESPACE_END diff --git a/passes/opt/opt.cc b/passes/opt/opt.cc index 021c1a03f..396819883 100644 --- a/passes/opt/opt.cc +++ b/passes/opt/opt.cc @@ -27,7 +27,7 @@ PRIVATE_NAMESPACE_BEGIN struct OptPass : public Pass { OptPass() : Pass("opt", "perform simple optimizations") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -44,7 +44,8 @@ struct OptPass : public Pass { log(" opt_muxtree\n"); log(" opt_reduce [-fine] [-full]\n"); log(" opt_merge [-share_all]\n"); - log(" opt_rmdff [-keepdc]\n"); + log(" opt_share (-full only)\n"); + log(" opt_rmdff [-keepdc] [-sat]\n"); log(" opt_clean [-purge]\n"); log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n"); log(" while <changed design>\n"); @@ -54,7 +55,7 @@ struct OptPass : public Pass { log(" do\n"); log(" opt_expr [-mux_undef] [-mux_bool] [-undriven] [-clkinv] [-fine] [-full] [-keepdc]\n"); log(" opt_merge [-share_all]\n"); - log(" opt_rmdff [-keepdc]\n"); + log(" opt_rmdff [-keepdc] [-sat]\n"); log(" opt_clean [-purge]\n"); log(" while <changed design in opt_rmdff>\n"); log("\n"); @@ -63,13 +64,14 @@ struct OptPass : public Pass { log("\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { std::string opt_clean_args; std::string opt_expr_args; std::string opt_reduce_args; std::string opt_merge_args; std::string opt_rmdff_args; + bool opt_share = false; bool fast_mode = false; log_header(design, "Executing OPT pass (performing simple optimizations).\n"); @@ -105,6 +107,7 @@ struct OptPass : public Pass { if (args[argidx] == "-full") { opt_expr_args += " -full"; opt_reduce_args += " -full"; + opt_share = true; continue; } if (args[argidx] == "-keepdc") { @@ -112,6 +115,10 @@ struct OptPass : public Pass { opt_rmdff_args += " -keepdc"; continue; } + if (args[argidx] == "-sat") { + opt_rmdff_args += " -sat"; + continue; + } if (args[argidx] == "-share_all") { opt_merge_args += " -share_all"; continue; @@ -147,6 +154,8 @@ struct OptPass : public Pass { Pass::call(design, "opt_muxtree"); Pass::call(design, "opt_reduce" + opt_reduce_args); Pass::call(design, "opt_merge" + opt_merge_args); + if (opt_share) + Pass::call(design, "opt_share"); Pass::call(design, "opt_rmdff" + opt_rmdff_args); Pass::call(design, "opt_clean" + opt_clean_args); Pass::call(design, "opt_expr" + opt_expr_args); diff --git a/passes/opt/opt_clean.cc b/passes/opt/opt_clean.cc index fb1851868..2f69b3d4c 100644 --- a/passes/opt/opt_clean.cc +++ b/passes/opt/opt_clean.cc @@ -52,7 +52,7 @@ struct keep_cache_t return cache.at(module); cache[module] = true; - if (!module->get_bool_attribute("\\keep")) { + if (!module->get_bool_attribute(ID::keep)) { bool found_keep = false; for (auto cell : module->cells()) if (query(cell)) found_keep = true; @@ -64,7 +64,7 @@ struct keep_cache_t bool query(Cell *cell) { - if (cell->type.in("$memwr", "$meminit", "$assert", "$assume", "$live", "$fair", "$cover")) + if (cell->type.in(ID($memwr), ID($meminit), ID($assert), ID($assume), ID($live), ID($fair), ID($cover), ID($specify2), ID($specify3), ID($specrule))) return true; if (cell->has_keep_attr()) @@ -85,15 +85,34 @@ void rmunused_module_cells(Module *module, bool verbose) { SigMap sigmap(module); pool<Cell*> queue, unused; + pool<SigBit> used_raw_bits; dict<SigBit, pool<Cell*>> wire2driver; + dict<SigBit, vector<string>> driver_driver_logs; + + SigMap raw_sigmap; + for (auto &it : module->connections_) { + for (int i = 0; i < GetSize(it.second); i++) { + if (it.second[i].wire != nullptr) + raw_sigmap.add(it.first[i], it.second[i]); + } + } for (auto &it : module->cells_) { Cell *cell = it.second; for (auto &it2 : cell->connections()) { - if (!ct_all.cell_known(cell->type) || ct_all.cell_output(cell->type, it2.first)) - for (auto bit : sigmap(it2.second)) - if (bit.wire != nullptr) - wire2driver[bit].insert(cell); + if (ct_all.cell_known(cell->type) && !ct_all.cell_output(cell->type, it2.first)) + continue; + for (auto raw_bit : it2.second) { + if (raw_bit.wire == nullptr) + continue; + auto bit = sigmap(raw_bit); + if (bit.wire == nullptr && ct_all.cell_known(cell->type)) + driver_driver_logs[raw_sigmap(raw_bit)].push_back(stringf("Driver-driver conflict " + "for %s between cell %s.%s and constant %s in %s: Resolved using constant.", + log_signal(raw_bit), log_id(cell), log_id(it2.first), log_signal(bit), log_id(module))); + if (bit.wire != nullptr) + wire2driver[bit].insert(cell); + } } if (keep_cache.query(cell)) queue.insert(cell); @@ -103,10 +122,12 @@ void rmunused_module_cells(Module *module, bool verbose) for (auto &it : module->wires_) { Wire *wire = it.second; - if (wire->port_output || wire->get_bool_attribute("\\keep")) { + if (wire->port_output || wire->get_bool_attribute(ID::keep)) { for (auto bit : sigmap(wire)) for (auto c : wire2driver[bit]) queue.insert(c), unused.erase(c); + for (auto raw_bit : SigSpec(wire)) + used_raw_bits.insert(raw_sigmap(raw_bit)); } } @@ -130,18 +151,34 @@ void rmunused_module_cells(Module *module, bool verbose) for (auto cell : unused) { if (verbose) - log(" removing unused `%s' cell `%s'.\n", cell->type.c_str(), cell->name.c_str()); + log_debug(" removing unused `%s' cell `%s'.\n", cell->type.c_str(), cell->name.c_str()); module->design->scratchpad_set_bool("opt.did_something", true); module->remove(cell); count_rm_cells++; } + + for (auto &it : module->cells_) { + Cell *cell = it.second; + for (auto &it2 : cell->connections()) { + if (ct_all.cell_known(cell->type) && !ct_all.cell_input(cell->type, it2.first)) + continue; + for (auto raw_bit : raw_sigmap(it2.second)) + used_raw_bits.insert(raw_bit); + } + } + + for (auto it : driver_driver_logs) { + if (used_raw_bits.count(it.first)) + for (auto msg : it.second) + log_warning("%s\n", msg.c_str()); + } } int count_nontrivial_wire_attrs(RTLIL::Wire *w) { int count = w->attributes.size(); - count -= w->attributes.count("\\src"); - count -= w->attributes.count("\\unused_bits"); + count -= w->attributes.count(ID(src)); + count -= w->attributes.count(ID(unused_bits)); return count; } @@ -185,17 +222,17 @@ bool compare_signals(RTLIL::SigBit &s1, RTLIL::SigBit &s2, SigPool ®s, SigPoo bool check_public_name(RTLIL::IdString id) { - const std::string &id_str = id.str(); - if (id_str[0] == '$') + if (id.begins_with("$")) return false; - if (id_str.substr(0, 2) == "\\_" && (id_str[id_str.size()-1] == '_' || id_str.find("_[") != std::string::npos)) + const std::string &id_str = id.str(); + if (id.begins_with("\\_") && (id.ends_with("_") || id_str.find("_[") != std::string::npos)) return false; if (id_str.find(".$") != std::string::npos) return false; return true; } -void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbose) +bool rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbose) { SigPool register_signals; SigPool connected_signals; @@ -238,11 +275,13 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos module->connections_.clear(); SigPool used_signals; + SigPool raw_used_signals; SigPool used_signals_nodrivers; for (auto &it : module->cells_) { RTLIL::Cell *cell = it.second; for (auto &it2 : cell->connections_) { assign_map.apply(it2.second); + raw_used_signals.add(it2.second); used_signals.add(it2.second); if (!ct_all.cell_output(cell->type, it2.first)) used_signals_nodrivers.add(it2.second); @@ -252,84 +291,116 @@ void rmunused_module_signals(RTLIL::Module *module, bool purge_mode, bool verbos RTLIL::Wire *wire = it.second; if (wire->port_id > 0) { RTLIL::SigSpec sig = RTLIL::SigSpec(wire); + raw_used_signals.add(sig); assign_map.apply(sig); used_signals.add(sig); if (!wire->port_input) used_signals_nodrivers.add(sig); } - if (wire->get_bool_attribute("\\keep")) { + if (wire->get_bool_attribute(ID::keep)) { RTLIL::SigSpec sig = RTLIL::SigSpec(wire); assign_map.apply(sig); used_signals.add(sig); } } - std::vector<RTLIL::Wire*> maybe_del_wires; + pool<RTLIL::Wire*> del_wires_queue; for (auto wire : module->wires()) { - if ((!purge_mode && check_public_name(wire->name)) || wire->port_id != 0 || wire->get_bool_attribute("\\keep") || wire->attributes.count("\\init")) { - RTLIL::SigSpec s1 = RTLIL::SigSpec(wire), s2 = s1; - assign_map.apply(s2); - if (!used_signals.check_any(s2) && wire->port_id == 0 && !wire->get_bool_attribute("\\keep")) { - maybe_del_wires.push_back(wire); - } else { - log_assert(GetSize(s1) == GetSize(s2)); - RTLIL::SigSig new_conn; - for (int i = 0; i < GetSize(s1); i++) - if (s1[i] != s2[i]) { - new_conn.first.append_bit(s1[i]); - new_conn.second.append_bit(s2[i]); + SigSpec s1 = SigSpec(wire), s2 = assign_map(s1); + log_assert(GetSize(s1) == GetSize(s2)); + + Const initval; + if (wire->attributes.count(ID(init))) + initval = wire->attributes.at(ID(init)); + if (GetSize(initval) != GetSize(wire)) + initval.bits.resize(GetSize(wire), State::Sx); + if (initval.is_fully_undef()) + wire->attributes.erase(ID(init)); + + if (GetSize(wire) == 0) { + // delete zero-width wires, unless they are module ports + if (wire->port_id == 0) + goto delete_this_wire; + } else + if (wire->port_id != 0 || wire->get_bool_attribute(ID::keep) || !initval.is_fully_undef()) { + // do not delete anything with "keep" or module ports or initialized wires + } else + if (!purge_mode && check_public_name(wire->name) && (raw_used_signals.check_any(s1) || used_signals.check_any(s2) || s1 != s2)) { + // do not get rid of public names unless in purge mode or if the wire is entirely unused, not even aliased + } else + if (!raw_used_signals.check_any(s1)) { + // delete wires that aren't used by anything directly + goto delete_this_wire; + } else + if (!used_signals.check_any(s2)) { + // delete wires that aren't used by anything indirectly, even though other wires may alias it + goto delete_this_wire; + } + + if (0) + { + delete_this_wire: + del_wires_queue.insert(wire); + } + else + { + RTLIL::SigSig new_conn; + for (int i = 0; i < GetSize(s1); i++) + if (s1[i] != s2[i]) { + if (s2[i] == State::Sx && (initval[i] == State::S0 || initval[i] == State::S1)) { + s2[i] = initval[i]; + initval[i] = State::Sx; } - if (new_conn.first.size() > 0) { - used_signals.add(new_conn.first); - used_signals.add(new_conn.second); - module->connect(new_conn); + new_conn.first.append_bit(s1[i]); + new_conn.second.append_bit(s2[i]); } + if (new_conn.first.size() > 0) { + if (initval.is_fully_undef()) + wire->attributes.erase(ID(init)); + else + wire->attributes.at(ID(init)) = initval; + used_signals.add(new_conn.first); + used_signals.add(new_conn.second); + module->connect(new_conn); } - } else { - if (!used_signals.check_any(RTLIL::SigSpec(wire))) - maybe_del_wires.push_back(wire); - } - RTLIL::SigSpec sig = assign_map(RTLIL::SigSpec(wire)); - if (!used_signals_nodrivers.check_any(sig)) { - std::string unused_bits; - for (int i = 0; i < GetSize(sig); i++) { - if (sig[i].wire == NULL) - continue; - if (!used_signals_nodrivers.check(sig[i])) { - if (!unused_bits.empty()) - unused_bits += " "; - unused_bits += stringf("%d", i); + if (!used_signals_nodrivers.check_all(s2)) { + std::string unused_bits; + for (int i = 0; i < GetSize(s2); i++) { + if (s2[i].wire == NULL) + continue; + if (!used_signals_nodrivers.check(s2[i])) { + if (!unused_bits.empty()) + unused_bits += " "; + unused_bits += stringf("%d", i); + } } + if (unused_bits.empty() || wire->port_id != 0) + wire->attributes.erase(ID(unused_bits)); + else + wire->attributes[ID(unused_bits)] = RTLIL::Const(unused_bits); + } else { + wire->attributes.erase(ID(unused_bits)); } - if (unused_bits.empty() || wire->port_id != 0) - wire->attributes.erase("\\unused_bits"); - else - wire->attributes["\\unused_bits"] = RTLIL::Const(unused_bits); - } else { - wire->attributes.erase("\\unused_bits"); } } + int del_temp_wires_count = 0; + for (auto wire : del_wires_queue) { + if (ys_debug() || (check_public_name(wire->name) && verbose)) + log_debug(" removing unused non-port wire %s.\n", wire->name.c_str()); + else + del_temp_wires_count++; + } - pool<RTLIL::Wire*> del_wires; + module->remove(del_wires_queue); + count_rm_wires += GetSize(del_wires_queue); - int del_wires_count = 0; - for (auto wire : maybe_del_wires) - if (!used_signals.check_any(RTLIL::SigSpec(wire))) { - if (check_public_name(wire->name) && verbose) { - log(" removing unused non-port wire %s.\n", wire->name.c_str()); - } - del_wires.insert(wire); - del_wires_count++; - } + if (verbose && del_temp_wires_count) + log_debug(" removed %d unused temporary wires.\n", del_temp_wires_count); - module->remove(del_wires); - count_rm_wires += del_wires.size(); - - if (verbose && del_wires_count > 0) - log(" removed %d unused temporary wires.\n", del_wires_count); + return !del_wires_queue.empty(); } bool rmunused_module_init(RTLIL::Module *module, bool purge_mode, bool verbose) @@ -342,18 +413,18 @@ bool rmunused_module_init(RTLIL::Module *module, bool purge_mode, bool verbose) dict<SigBit, State> qbits; for (auto cell : module->cells()) - if (fftypes.cell_known(cell->type) && cell->hasPort("\\Q")) + if (fftypes.cell_known(cell->type) && cell->hasPort(ID(Q))) { - SigSpec sig = cell->getPort("\\Q"); + SigSpec sig = cell->getPort(ID(Q)); for (int i = 0; i < GetSize(sig); i++) { SigBit bit = sig[i]; - if (bit.wire == nullptr || bit.wire->attributes.count("\\init") == 0) + if (bit.wire == nullptr || bit.wire->attributes.count(ID(init)) == 0) continue; - Const init = bit.wire->attributes.at("\\init"); + Const init = bit.wire->attributes.at(ID(init)); if (i >= GetSize(init) || init[i] == State::Sx || init[i] == State::Sz) continue; @@ -368,10 +439,10 @@ bool rmunused_module_init(RTLIL::Module *module, bool purge_mode, bool verbose) if (!purge_mode && wire->name[0] == '\\') continue; - if (wire->attributes.count("\\init") == 0) + if (wire->attributes.count(ID(init)) == 0) continue; - Const init = wire->attributes.at("\\init"); + Const init = wire->attributes.at(ID(init)); for (int i = 0; i < GetSize(wire) && i < GetSize(init); i++) { @@ -392,9 +463,9 @@ bool rmunused_module_init(RTLIL::Module *module, bool purge_mode, bool verbose) } if (verbose) - log(" removing redundent init attribute on %s.\n", log_id(wire)); + log_debug(" removing redundant init attribute on %s.\n", log_id(wire)); - wire->attributes.erase("\\init"); + wire->attributes.erase(ID(init)); did_something = true; next_wire:; } @@ -409,33 +480,33 @@ void rmunused_module(RTLIL::Module *module, bool purge_mode, bool verbose, bool std::vector<RTLIL::Cell*> delcells; for (auto cell : module->cells()) - if (cell->type.in("$pos", "$_BUF_")) { - bool is_signed = cell->type == "$pos" && cell->getParam("\\A_SIGNED").as_bool(); - RTLIL::SigSpec a = cell->getPort("\\A"); - RTLIL::SigSpec y = cell->getPort("\\Y"); + if (cell->type.in(ID($pos), ID($_BUF_)) && !cell->has_keep_attr()) { + bool is_signed = cell->type == ID($pos) && cell->getParam(ID(A_SIGNED)).as_bool(); + RTLIL::SigSpec a = cell->getPort(ID::A); + RTLIL::SigSpec y = cell->getPort(ID::Y); a.extend_u0(GetSize(y), is_signed); module->connect(y, a); delcells.push_back(cell); } for (auto cell : delcells) { if (verbose) - log(" removing buffer cell `%s': %s = %s\n", cell->name.c_str(), - log_signal(cell->getPort("\\Y")), log_signal(cell->getPort("\\A"))); + log_debug(" removing buffer cell `%s': %s = %s\n", cell->name.c_str(), + log_signal(cell->getPort(ID::Y)), log_signal(cell->getPort(ID::A))); module->remove(cell); } if (!delcells.empty()) module->design->scratchpad_set_bool("opt.did_something", true); rmunused_module_cells(module, verbose); - rmunused_module_signals(module, purge_mode, verbose); + while (rmunused_module_signals(module, purge_mode, verbose)) { } if (rminit && rmunused_module_init(module, purge_mode, verbose)) - rmunused_module_signals(module, purge_mode, verbose); + while (rmunused_module_signals(module, purge_mode, verbose)) { } } struct OptCleanPass : public Pass { OptCleanPass() : Pass("opt_clean", "remove unused cells and wires") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -452,7 +523,7 @@ struct OptCleanPass : public Pass { log(" also remove internal nets if they have a public name\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { bool purge_mode = false; @@ -476,6 +547,9 @@ struct OptCleanPass : public Pass { ct_all.setup(design); + count_rm_cells = 0; + count_rm_wires = 0; + for (auto module : design->selected_whole_modules_warn()) { if (module->has_processes_warn()) continue; @@ -498,7 +572,7 @@ struct OptCleanPass : public Pass { struct CleanPass : public Pass { CleanPass() : Pass("clean", "remove unused cells and wires") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -513,7 +587,7 @@ struct CleanPass : public Pass { log("in -purge mode between the commands.\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { bool purge_mode = false; @@ -541,9 +615,10 @@ struct CleanPass : public Pass { for (auto module : design->selected_whole_modules()) { if (module->has_processes()) continue; - rmunused_module(module, purge_mode, false, false); + rmunused_module(module, purge_mode, ys_debug(), false); } + log_suppressed(); if (count_rm_cells > 0 || count_rm_wires > 0) log("Removed %d unused cells and %d unused wires.\n", count_rm_cells, count_rm_wires); diff --git a/passes/opt/opt_demorgan.cc b/passes/opt/opt_demorgan.cc index f2af1cb93..4bc82815b 100644 --- a/passes/opt/opt_demorgan.cc +++ b/passes/opt/opt_demorgan.cc @@ -35,10 +35,10 @@ void demorgan_worker( //TODO: Add support for reduce_xor //DeMorgan of XOR is either XOR (if even number of inputs) or XNOR (if odd number) - if( (cell->type != "$reduce_and") && (cell->type != "$reduce_or") ) + if( (cell->type != ID($reduce_and)) && (cell->type != ID($reduce_or)) ) return; - auto insig = sigmap(cell->getPort("\\A")); + auto insig = sigmap(cell->getPort(ID::A)); log("Inspecting %s cell %s (%d inputs)\n", log_id(cell->type), log_id(cell->name), GetSize(insig)); int num_inverted = 0; for(int i=0; i<GetSize(insig); i++) @@ -51,7 +51,7 @@ void demorgan_worker( bool inverted = false; for(auto x : ports) { - if(x.port == "\\Y" && x.cell->type == "$_NOT_") + if(x.port == ID::Y && x.cell->type == ID($_NOT_)) { inverted = true; break; @@ -85,7 +85,7 @@ void demorgan_worker( RTLIL::Cell* srcinv = NULL; for(auto x : ports) { - if(x.port == "\\Y" && x.cell->type == "$_NOT_") + if(x.port == ID::Y && x.cell->type == ID($_NOT_)) { srcinv = x.cell; break; @@ -103,7 +103,7 @@ void demorgan_worker( //We ARE inverted - bypass it //Don't automatically delete the inverter since other stuff might still use it else - insig[i] = srcinv->getPort("\\A"); + insig[i] = srcinv->getPort(ID::A); } //Cosmetic fixup: If our input is just a scrambled version of one bus, rearrange it @@ -151,25 +151,25 @@ void demorgan_worker( } //Push the new input signal back to the reduction (after bypassing/adding inverters) - cell->setPort("\\A", insig); + cell->setPort(ID::A, insig); //Change the cell type - if(cell->type == "$reduce_and") - cell->type = "$reduce_or"; - else if(cell->type == "$reduce_or") - cell->type = "$reduce_and"; + if(cell->type == ID($reduce_and)) + cell->type = ID($reduce_or); + else if(cell->type == ID($reduce_or)) + cell->type = ID($reduce_and); //don't change XOR //Add an inverter to the output - auto inverted_output = cell->getPort("\\Y"); + auto inverted_output = cell->getPort(ID::Y); auto uninverted_output = m->addWire(NEW_ID); m->addNot(NEW_ID, RTLIL::SigSpec(uninverted_output), inverted_output); - cell->setPort("\\Y", uninverted_output); + cell->setPort(ID::Y, uninverted_output); } struct OptDemorganPass : public Pass { OptDemorganPass() : Pass("opt_demorgan", "Optimize reductions with DeMorgan equivalents") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -179,7 +179,7 @@ struct OptDemorganPass : public Pass { log("overall gate count of the circuit\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { log_header(design, "Executing OPT_DEMORGAN pass (push inverters through $reduce_* cells).\n"); diff --git a/passes/opt/opt_expr.cc b/passes/opt/opt_expr.cc index 45331aa0b..4a2f170b8 100644 --- a/passes/opt/opt_expr.cc +++ b/passes/opt/opt_expr.cc @@ -39,6 +39,9 @@ void replace_undriven(RTLIL::Design *design, RTLIL::Module *module) SigPool used_signals; SigPool all_signals; + dict<SigBit, pair<Wire*, State>> initbits; + pool<Wire*> revisit_initwires; + for (auto cell : module->cells()) for (auto &conn : cell->connections()) { if (!ct.cell_known(cell->type) || ct.cell_output(cell->type, conn.first)) @@ -48,9 +51,17 @@ void replace_undriven(RTLIL::Design *design, RTLIL::Module *module) } for (auto wire : module->wires()) { + if (wire->attributes.count(ID(init))) { + SigSpec sig = sigmap(wire); + Const initval = wire->attributes.at(ID(init)); + for (int i = 0; i < GetSize(initval) && i < GetSize(wire); i++) { + if (initval[i] == State::S0 || initval[i] == State::S1) + initbits[sig[i]] = make_pair(wire, initval[i]); + } + } if (wire->port_input) driven_signals.add(sigmap(wire)); - if (wire->port_output) + if (wire->port_output || wire->get_bool_attribute(ID::keep)) used_signals.add(sigmap(wire)); all_signals.add(sigmap(wire)); } @@ -67,18 +78,52 @@ void replace_undriven(RTLIL::Design *design, RTLIL::Module *module) if (sig.size() == 0) continue; - log("Setting undriven signal in %s to undef: %s\n", RTLIL::id2cstr(module->name), log_signal(c)); - module->connect(RTLIL::SigSig(c, RTLIL::SigSpec(RTLIL::State::Sx, c.width))); + Const val(RTLIL::State::Sx, GetSize(sig)); + for (int i = 0; i < GetSize(sig); i++) { + SigBit bit = sigmap(sig[i]); + auto cursor = initbits.find(bit); + if (cursor != initbits.end()) { + revisit_initwires.insert(cursor->second.first); + val[i] = cursor->second.second; + } + } + + log_debug("Setting undriven signal in %s to constant: %s = %s\n", log_id(module), log_signal(sig), log_signal(val)); + module->connect(sig, val); did_something = true; } + + if (!revisit_initwires.empty()) + { + SigMap sm2(module); + + for (auto wire : revisit_initwires) { + SigSpec sig = sm2(wire); + Const initval = wire->attributes.at(ID(init)); + for (int i = 0; i < GetSize(initval) && i < GetSize(wire); i++) { + if (SigBit(initval[i]) == sig[i]) + initval[i] = State::Sx; + } + if (initval.is_fully_undef()) { + log_debug("Removing init attribute from %s/%s.\n", log_id(module), log_id(wire)); + wire->attributes.erase(ID(init)); + did_something = true; + } else if (initval != wire->attributes.at(ID(init))) { + log_debug("Updating init attribute on %s/%s: %s\n", log_id(module), log_id(wire), log_signal(initval)); + wire->attributes[ID(init)] = initval; + did_something = true; + } + } + } } -void replace_cell(SigMap &assign_map, RTLIL::Module *module, RTLIL::Cell *cell, std::string info, std::string out_port, RTLIL::SigSpec out_val) +void replace_cell(SigMap &assign_map, RTLIL::Module *module, RTLIL::Cell *cell, + const std::string &info YS_ATTRIBUTE(unused), IdString out_port, RTLIL::SigSpec out_val) { RTLIL::SigSpec Y = cell->getPort(out_port); out_val.extend_u0(Y.size(), false); - log("Replacing %s cell `%s' (%s) in module `%s' with constant driver `%s = %s'.\n", + log_debug("Replacing %s cell `%s' (%s) in module `%s' with constant driver `%s = %s'.\n", cell->type.c_str(), cell->name.c_str(), info.c_str(), module->name.c_str(), log_signal(Y), log_signal(out_val)); // log_cell(cell); @@ -90,14 +135,14 @@ void replace_cell(SigMap &assign_map, RTLIL::Module *module, RTLIL::Cell *cell, bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutative, SigMap &sigmap) { - std::string b_name = cell->hasPort("\\B") ? "\\B" : "\\A"; + IdString b_name = cell->hasPort(ID::B) ? ID::B : ID::A; - bool a_signed = cell->parameters.at("\\A_SIGNED").as_bool(); - bool b_signed = cell->parameters.at(b_name + "_SIGNED").as_bool(); + bool a_signed = cell->parameters.at(ID(A_SIGNED)).as_bool(); + bool b_signed = cell->parameters.at(b_name.str() + "_SIGNED").as_bool(); - RTLIL::SigSpec sig_a = sigmap(cell->getPort("\\A")); + RTLIL::SigSpec sig_a = sigmap(cell->getPort(ID::A)); RTLIL::SigSpec sig_b = sigmap(cell->getPort(b_name)); - RTLIL::SigSpec sig_y = sigmap(cell->getPort("\\Y")); + RTLIL::SigSpec sig_y = sigmap(cell->getPort(ID::Y)); sig_a.extend_u0(sig_y.size(), a_signed); sig_b.extend_u0(sig_y.size(), b_signed); @@ -112,10 +157,10 @@ bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutativ int group_idx = GRP_DYN; RTLIL::SigBit bit_a = bits_a[i], bit_b = bits_b[i]; - if (cell->type == "$or" && (bit_a == RTLIL::State::S1 || bit_b == RTLIL::State::S1)) + if (cell->type == ID($or) && (bit_a == RTLIL::State::S1 || bit_b == RTLIL::State::S1)) bit_a = bit_b = RTLIL::State::S1; - if (cell->type == "$and" && (bit_a == RTLIL::State::S0 || bit_b == RTLIL::State::S0)) + if (cell->type == ID($and) && (bit_a == RTLIL::State::S0 || bit_b == RTLIL::State::S0)) bit_a = bit_b = RTLIL::State::S0; if (bit_a.wire == NULL && bit_b.wire == NULL) @@ -134,7 +179,7 @@ bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutativ if (GetSize(grouped_bits[i]) == GetSize(bits_y)) return false; - log("Replacing %s cell `%s' in module `%s' with cells using grouped bits:\n", + log_debug("Replacing %s cell `%s' in module `%s' with cells using grouped bits:\n", log_id(cell->type), log_id(cell), log_id(module)); for (int i = 0; i < GRP_N; i++) @@ -155,28 +200,35 @@ bool group_cell_inputs(RTLIL::Module *module, RTLIL::Cell *cell, bool commutativ new_b.append_bit(it.first.second); } + if (cell->type.in(ID($and), ID($or)) && i == GRP_CONST_A) { + log_debug(" Direct Connection: %s (%s with %s)\n", log_signal(new_b), log_id(cell->type), log_signal(new_a)); + module->connect(new_y, new_b); + module->connect(new_conn); + continue; + } + RTLIL::Cell *c = module->addCell(NEW_ID, cell->type); - c->setPort("\\A", new_a); - c->parameters["\\A_WIDTH"] = new_a.size(); - c->parameters["\\A_SIGNED"] = false; + c->setPort(ID::A, new_a); + c->parameters[ID(A_WIDTH)] = new_a.size(); + c->parameters[ID(A_SIGNED)] = false; - if (b_name == "\\B") { - c->setPort("\\B", new_b); - c->parameters["\\B_WIDTH"] = new_b.size(); - c->parameters["\\B_SIGNED"] = false; + if (b_name == ID::B) { + c->setPort(ID::B, new_b); + c->parameters[ID(B_WIDTH)] = new_b.size(); + c->parameters[ID(B_SIGNED)] = false; } - c->setPort("\\Y", new_y); - c->parameters["\\Y_WIDTH"] = new_y->width; + c->setPort(ID::Y, new_y); + c->parameters[ID(Y_WIDTH)] = new_y->width; c->check(); module->connect(new_conn); - log(" New cell `%s': A=%s", log_id(c), log_signal(new_a)); - if (b_name == "\\B") - log(", B=%s", log_signal(new_b)); - log("\n"); + log_debug(" New cell `%s': A=%s", log_id(c), log_signal(new_a)); + if (b_name == ID::B) + log_debug(", B=%s", log_signal(new_b)); + log_debug("\n"); } cover_list("opt.opt_expr.fine.group", "$not", "$pos", "$and", "$or", "$xor", "$xnor", cell->type.str()); @@ -190,7 +242,7 @@ void handle_polarity_inv(Cell *cell, IdString port, IdString param, const SigMap { SigSpec sig = assign_map(cell->getPort(port)); if (invert_map.count(sig)) { - log("Inverting %s of %s cell `%s' in module `%s': %s -> %s\n", + log_debug("Inverting %s of %s cell `%s' in module `%s': %s -> %s\n", log_id(port), log_id(cell->type), log_id(cell), log_id(cell->module), log_signal(sig), log_signal(invert_map.at(sig))); cell->setPort(port, (invert_map.at(sig))); @@ -219,7 +271,7 @@ void handle_clkpol_celltype_swap(Cell *cell, string type1, string type2, IdStrin if (cell->type.in(type1, type2)) { SigSpec sig = assign_map(cell->getPort(port)); if (invert_map.count(sig)) { - log("Inverting %s of %s cell `%s' in module `%s': %s -> %s\n", + log_debug("Inverting %s of %s cell `%s' in module `%s': %s -> %s\n", log_id(port), log_id(cell->type), log_id(cell), log_id(cell->module), log_signal(sig), log_signal(invert_map.at(sig))); cell->setPort(port, (invert_map.at(sig))); @@ -259,6 +311,22 @@ bool is_one_or_minus_one(const Const &value, bool is_signed, bool &is_negative) return last_bit_one; } +int get_highest_hot_index(RTLIL::SigSpec signal) +{ + for (int i = GetSize(signal) - 1; i >= 0; i--) + { + if (signal[i] == RTLIL::State::S0) + continue; + + if (signal[i] == RTLIL::State::S1) + return i; + + break; + } + + return -1; +} + // if the signal has only one bit set, return the index of that bit. // otherwise return -1 int get_onehot_bit_index(RTLIL::SigSpec signal) @@ -300,11 +368,12 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons for (auto cell : module->cells()) if (design->selected(module, cell) && cell->type[0] == '$') { - if ((cell->type == "$_NOT_" || cell->type == "$not" || cell->type == "$logic_not") && - cell->getPort("\\A").size() == 1 && cell->getPort("\\Y").size() == 1) - invert_map[assign_map(cell->getPort("\\Y"))] = assign_map(cell->getPort("\\A")); - if ((cell->type == "$mux" || cell->type == "$_MUX_") && cell->getPort("\\A") == SigSpec(State::S1) && cell->getPort("\\B") == SigSpec(State::S0)) - invert_map[assign_map(cell->getPort("\\Y"))] = assign_map(cell->getPort("\\S")); + if (cell->type.in(ID($_NOT_), ID($not), ID($logic_not)) && + GetSize(cell->getPort(ID::A)) == 1 && GetSize(cell->getPort(ID::Y)) == 1) + invert_map[assign_map(cell->getPort(ID::Y))] = assign_map(cell->getPort(ID::A)); + if (cell->type.in(ID($mux), ID($_MUX_)) && + cell->getPort(ID::A) == SigSpec(State::S1) && cell->getPort(ID::B) == SigSpec(State::S0)) + invert_map[assign_map(cell->getPort(ID::Y))] = assign_map(cell->getPort(ID(S))); if (ct_combinational.cell_known(cell->type)) for (auto &conn : cell->connections()) { RTLIL::SigSpec sig = assign_map(conn.second); @@ -328,66 +397,66 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons for (auto cell : cells.sorted) { #define ACTION_DO(_p_, _s_) do { cover("opt.opt_expr.action_" S__LINE__); replace_cell(assign_map, module, cell, input.as_string(), _p_, _s_); goto next_cell; } while (0) -#define ACTION_DO_Y(_v_) ACTION_DO("\\Y", RTLIL::SigSpec(RTLIL::State::S ## _v_)) +#define ACTION_DO_Y(_v_) ACTION_DO(ID::Y, RTLIL::SigSpec(RTLIL::State::S ## _v_)) if (clkinv) { - if (cell->type.in("$dff", "$dffe", "$dffsr", "$adff", "$fsm", "$memrd", "$memwr")) - handle_polarity_inv(cell, "\\CLK", "\\CLK_POLARITY", assign_map, invert_map); + if (cell->type.in(ID($dff), ID($dffe), ID($dffsr), ID($adff), ID($fsm), ID($memrd), ID($memwr))) + handle_polarity_inv(cell, ID(CLK), ID(CLK_POLARITY), assign_map, invert_map); - if (cell->type.in("$sr", "$dffsr", "$dlatchsr")) { - handle_polarity_inv(cell, "\\SET", "\\SET_POLARITY", assign_map, invert_map); - handle_polarity_inv(cell, "\\CLR", "\\CLR_POLARITY", assign_map, invert_map); + if (cell->type.in(ID($sr), ID($dffsr), ID($dlatchsr))) { + handle_polarity_inv(cell, ID(SET), ID(SET_POLARITY), assign_map, invert_map); + handle_polarity_inv(cell, ID(CLR), ID(CLR_POLARITY), assign_map, invert_map); } - if (cell->type.in("$dffe", "$dlatch", "$dlatchsr")) - handle_polarity_inv(cell, "\\EN", "\\EN_POLARITY", assign_map, invert_map); + if (cell->type.in(ID($dffe), ID($dlatch), ID($dlatchsr))) + handle_polarity_inv(cell, ID(EN), ID(EN_POLARITY), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_SR_N?_", "$_SR_P?_", "\\S", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_SR_?N_", "$_SR_?P_", "\\R", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_SR_N?_", "$_SR_P?_", ID(S), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_SR_?N_", "$_SR_?P_", ID(R), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFF_N_", "$_DFF_P_", "\\C", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFF_N_", "$_DFF_P_", ID(C), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFFE_N?_", "$_DFFE_P?_", "\\C", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFFE_?N_", "$_DFFE_?P_", "\\E", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFFE_N?_", "$_DFFE_P?_", ID(C), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFFE_?N_", "$_DFFE_?P_", ID(E), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFF_N??_", "$_DFF_P??_", "\\C", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFF_?N?_", "$_DFF_?P?_", "\\R", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFF_N??_", "$_DFF_P??_", ID(C), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFF_?N?_", "$_DFF_?P?_", ID(R), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFFSR_N??_", "$_DFFSR_P??_", "\\C", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFFSR_?N?_", "$_DFFSR_?P?_", "\\S", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DFFSR_??N_", "$_DFFSR_??P_", "\\R", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFFSR_N??_", "$_DFFSR_P??_", ID(C), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFFSR_?N?_", "$_DFFSR_?P?_", ID(S), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DFFSR_??N_", "$_DFFSR_??P_", ID(R), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DLATCH_N_", "$_DLATCH_P_", "\\E", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DLATCH_N_", "$_DLATCH_P_", ID(E), assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DLATCHSR_N??_", "$_DLATCHSR_P??_", "\\E", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DLATCHSR_?N?_", "$_DLATCHSR_?P?_", "\\S", assign_map, invert_map); - handle_clkpol_celltype_swap(cell, "$_DLATCHSR_??N_", "$_DLATCHSR_??P_", "\\R", assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DLATCHSR_N??_", "$_DLATCHSR_P??_", ID(E), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DLATCHSR_?N?_", "$_DLATCHSR_?P?_", ID(S), assign_map, invert_map); + handle_clkpol_celltype_swap(cell, "$_DLATCHSR_??N_", "$_DLATCHSR_??P_", ID(R), assign_map, invert_map); } bool detect_const_and = false; bool detect_const_or = false; - if (cell->type.in("$reduce_and", "$_AND_")) + if (cell->type.in(ID($reduce_and), ID($_AND_))) detect_const_and = true; - if (cell->type.in("$and", "$logic_and") && GetSize(cell->getPort("\\A")) == 1 && GetSize(cell->getPort("\\B")) == 1 && !cell->getParam("\\A_SIGNED").as_bool()) + if (cell->type.in(ID($and), ID($logic_and)) && GetSize(cell->getPort(ID::A)) == 1 && GetSize(cell->getPort(ID::B)) == 1 && !cell->getParam(ID(A_SIGNED)).as_bool()) detect_const_and = true; - if (cell->type.in("$reduce_or", "$reduce_bool", "$_OR_")) + if (cell->type.in(ID($reduce_or), ID($reduce_bool), ID($_OR_))) detect_const_or = true; - if (cell->type.in("$or", "$logic_or") && GetSize(cell->getPort("\\A")) == 1 && GetSize(cell->getPort("\\B")) == 1 && !cell->getParam("\\A_SIGNED").as_bool()) + if (cell->type.in(ID($or), ID($logic_or)) && GetSize(cell->getPort(ID::A)) == 1 && GetSize(cell->getPort(ID::B)) == 1 && !cell->getParam(ID(A_SIGNED)).as_bool()) detect_const_or = true; if (detect_const_and || detect_const_or) { - pool<SigBit> input_bits = assign_map(cell->getPort("\\A")).to_sigbit_pool(); + pool<SigBit> input_bits = assign_map(cell->getPort(ID::A)).to_sigbit_pool(); bool found_zero = false, found_one = false, found_undef = false, found_inv = false, many_conconst = false; SigBit non_const_input = State::Sm; - if (cell->hasPort("\\B")) { - vector<SigBit> more_bits = assign_map(cell->getPort("\\B")).to_sigbit_vector(); + if (cell->hasPort(ID::B)) { + vector<SigBit> more_bits = assign_map(cell->getPort(ID::B)).to_sigbit_vector(); input_bits.insert(more_bits.begin(), more_bits.end()); } @@ -410,51 +479,50 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (detect_const_and && (found_zero || found_inv)) { cover("opt.opt_expr.const_and"); - replace_cell(assign_map, module, cell, "const_and", "\\Y", RTLIL::State::S0); + replace_cell(assign_map, module, cell, "const_and", ID::Y, RTLIL::State::S0); goto next_cell; } if (detect_const_or && (found_one || found_inv)) { cover("opt.opt_expr.const_or"); - replace_cell(assign_map, module, cell, "const_or", "\\Y", RTLIL::State::S1); + replace_cell(assign_map, module, cell, "const_or", ID::Y, RTLIL::State::S1); goto next_cell; } if (non_const_input != State::Sm && !found_undef) { cover("opt.opt_expr.and_or_buffer"); - replace_cell(assign_map, module, cell, "and_or_buffer", "\\Y", non_const_input); + replace_cell(assign_map, module, cell, "and_or_buffer", ID::Y, non_const_input); goto next_cell; } } - if (cell->type.in("$reduce_and", "$reduce_or", "$reduce_bool", "$reduce_xor", "$reduce_xnor", "$neg") && - GetSize(cell->getPort("\\A")) == 1 && GetSize(cell->getPort("\\Y")) == 1) + if (cell->type.in(ID($reduce_and), ID($reduce_or), ID($reduce_bool), ID($reduce_xor), ID($reduce_xnor), ID($neg)) && + GetSize(cell->getPort(ID::A)) == 1 && GetSize(cell->getPort(ID::Y)) == 1) { - if (cell->type == "$reduce_xnor") { + if (cell->type == ID($reduce_xnor)) { cover("opt.opt_expr.reduce_xnor_not"); - log("Replacing %s cell `%s' in module `%s' with $not cell.\n", + log_debug("Replacing %s cell `%s' in module `%s' with $not cell.\n", log_id(cell->type), log_id(cell->name), log_id(module)); - cell->type = "$not"; + cell->type = ID($not); + did_something = true; } else { cover("opt.opt_expr.unary_buffer"); - replace_cell(assign_map, module, cell, "unary_buffer", "\\Y", cell->getPort("\\A")); + replace_cell(assign_map, module, cell, "unary_buffer", ID::Y, cell->getPort(ID::A)); } goto next_cell; } if (do_fine) { - if (cell->type == "$not" || cell->type == "$pos" || - cell->type == "$and" || cell->type == "$or" || cell->type == "$xor" || cell->type == "$xnor") + if (cell->type.in(ID($not), ID($pos), ID($and), ID($or), ID($xor), ID($xnor))) if (group_cell_inputs(module, cell, true, assign_map)) goto next_cell; - if (cell->type == "$logic_not" || cell->type == "$logic_and" || cell->type == "$logic_or" || - cell->type == "$reduce_or" || cell->type == "$reduce_and" || cell->type == "$reduce_bool") + if (cell->type.in(ID($logic_not), ID($logic_and), ID($logic_or), ID($reduce_or), ID($reduce_and), ID($reduce_bool))) { - SigBit neutral_bit = cell->type == "$reduce_and" ? State::S1 : State::S0; + SigBit neutral_bit = cell->type == ID($reduce_and) ? State::S1 : State::S0; - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); RTLIL::SigSpec new_sig_a; for (auto bit : sig_a) @@ -465,19 +533,19 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (GetSize(new_sig_a) < GetSize(sig_a)) { cover_list("opt.opt_expr.fine.neutral_A", "$logic_not", "$logic_and", "$logic_or", "$reduce_or", "$reduce_and", "$reduce_bool", cell->type.str()); - log("Replacing port A of %s cell `%s' in module `%s' with shorter expression: %s -> %s\n", + log_debug("Replacing port A of %s cell `%s' in module `%s' with shorter expression: %s -> %s\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_a), log_signal(new_sig_a)); - cell->setPort("\\A", new_sig_a); - cell->parameters.at("\\A_WIDTH") = GetSize(new_sig_a); + cell->setPort(ID::A, new_sig_a); + cell->parameters.at(ID(A_WIDTH)) = GetSize(new_sig_a); did_something = true; } } - if (cell->type == "$logic_and" || cell->type == "$logic_or") + if (cell->type.in(ID($logic_and), ID($logic_or))) { SigBit neutral_bit = State::S0; - RTLIL::SigSpec sig_b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); RTLIL::SigSpec new_sig_b; for (auto bit : sig_b) @@ -488,17 +556,17 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (GetSize(new_sig_b) < GetSize(sig_b)) { cover_list("opt.opt_expr.fine.neutral_B", "$logic_and", "$logic_or", cell->type.str()); - log("Replacing port B of %s cell `%s' in module `%s' with shorter expression: %s -> %s\n", + log_debug("Replacing port B of %s cell `%s' in module `%s' with shorter expression: %s -> %s\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_b), log_signal(new_sig_b)); - cell->setPort("\\B", new_sig_b); - cell->parameters.at("\\B_WIDTH") = GetSize(new_sig_b); + cell->setPort(ID::B, new_sig_b); + cell->parameters.at(ID(B_WIDTH)) = GetSize(new_sig_b); did_something = true; } } - if (cell->type == "$reduce_and") + if (cell->type == ID($reduce_and)) { - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); RTLIL::State new_a = RTLIL::State::S1; for (auto &bit : sig_a.to_sigbit_vector()) @@ -514,17 +582,17 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (new_a != RTLIL::State::Sm && RTLIL::SigSpec(new_a) != sig_a) { cover("opt.opt_expr.fine.$reduce_and"); - log("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", + log_debug("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_a), log_signal(new_a)); - cell->setPort("\\A", sig_a = new_a); - cell->parameters.at("\\A_WIDTH") = 1; + cell->setPort(ID::A, sig_a = new_a); + cell->parameters.at(ID(A_WIDTH)) = 1; did_something = true; } } - if (cell->type == "$logic_not" || cell->type == "$logic_and" || cell->type == "$logic_or" || cell->type == "$reduce_or" || cell->type == "$reduce_bool") + if (cell->type.in(ID($logic_not), ID($logic_and), ID($logic_or), ID($reduce_or), ID($reduce_bool))) { - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); RTLIL::State new_a = RTLIL::State::S0; for (auto &bit : sig_a.to_sigbit_vector()) @@ -540,17 +608,17 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (new_a != RTLIL::State::Sm && RTLIL::SigSpec(new_a) != sig_a) { cover_list("opt.opt_expr.fine.A", "$logic_not", "$logic_and", "$logic_or", "$reduce_or", "$reduce_bool", cell->type.str()); - log("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", + log_debug("Replacing port A of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_a), log_signal(new_a)); - cell->setPort("\\A", sig_a = new_a); - cell->parameters.at("\\A_WIDTH") = 1; + cell->setPort(ID::A, sig_a = new_a); + cell->parameters.at(ID(A_WIDTH)) = 1; did_something = true; } } - if (cell->type == "$logic_and" || cell->type == "$logic_or") + if (cell->type.in(ID($logic_and), ID($logic_or))) { - RTLIL::SigSpec sig_b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); RTLIL::State new_b = RTLIL::State::S0; for (auto &bit : sig_b.to_sigbit_vector()) @@ -566,25 +634,95 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (new_b != RTLIL::State::Sm && RTLIL::SigSpec(new_b) != sig_b) { cover_list("opt.opt_expr.fine.B", "$logic_and", "$logic_or", cell->type.str()); - log("Replacing port B of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", + log_debug("Replacing port B of %s cell `%s' in module `%s' with constant driver: %s -> %s\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), log_signal(sig_b), log_signal(new_b)); - cell->setPort("\\B", sig_b = new_b); - cell->parameters.at("\\B_WIDTH") = 1; + cell->setPort(ID::B, sig_b = new_b); + cell->parameters.at(ID(B_WIDTH)) = 1; + did_something = true; + } + } + + if (cell->type.in(ID($add), ID($sub))) + { + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); + RTLIL::SigSpec sig_y = cell->getPort(ID::Y); + bool sub = cell->type == ID($sub); + + int i; + for (i = 0; i < GetSize(sig_y); i++) { + if (sig_b.at(i, State::Sx) == State::S0 && sig_a.at(i, State::Sx) != State::Sx) + module->connect(sig_y[i], sig_a[i]); + else if (!sub && sig_a.at(i, State::Sx) == State::S0 && sig_b.at(i, State::Sx) != State::Sx) + module->connect(sig_y[i], sig_b[i]); + else + break; + } + if (i > 0) { + cover_list("opt.opt_expr.fine", "$add", "$sub", cell->type.str()); + cell->setPort(ID::A, sig_a.extract_end(i)); + cell->setPort(ID::B, sig_b.extract_end(i)); + cell->setPort(ID::Y, sig_y.extract_end(i)); + cell->fixup_parameters(); + did_something = true; + } + } + + if (cell->type == "$alu") + { + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); + RTLIL::SigBit sig_ci = assign_map(cell->getPort(ID(CI))); + RTLIL::SigBit sig_bi = assign_map(cell->getPort(ID(BI))); + RTLIL::SigSpec sig_x = cell->getPort(ID(X)); + RTLIL::SigSpec sig_y = cell->getPort(ID::Y); + RTLIL::SigSpec sig_co = cell->getPort(ID(CO)); + + if (sig_ci.wire || sig_bi.wire) + goto next_cell; + + bool sub = (sig_ci == State::S1 && sig_bi == State::S1); + + // If not a subtraction, yet there is a carry or B is inverted + // then no optimisation is possible as carry will not be constant + if (!sub && (sig_ci != State::S0 || sig_bi != State::S0)) + goto next_cell; + + int i; + for (i = 0; i < GetSize(sig_y); i++) { + if (sig_b.at(i, State::Sx) == State::S0 && sig_a.at(i, State::Sx) != State::Sx) { + module->connect(sig_x[i], sub ? module->Not(NEW_ID, sig_a[i]).as_bit() : sig_a[i]); + module->connect(sig_y[i], sig_a[i]); + module->connect(sig_co[i], sub ? State::S1 : State::S0); + } + else if (!sub && sig_a.at(i, State::Sx) == State::S0 && sig_b.at(i, State::Sx) != State::Sx) { + module->connect(sig_x[i], sig_b[i]); + module->connect(sig_y[i], sig_b[i]); + module->connect(sig_co[i], State::S0); + } + else + break; + } + if (i > 0) { + cover("opt.opt_expr.fine.$alu"); + cell->setPort(ID::A, sig_a.extract_end(i)); + cell->setPort(ID::B, sig_b.extract_end(i)); + cell->setPort(ID(X), sig_x.extract_end(i)); + cell->setPort(ID::Y, sig_y.extract_end(i)); + cell->setPort(ID(CO), sig_co.extract_end(i)); + cell->fixup_parameters(); did_something = true; } } } - if (cell->type == "$reduce_xor" || cell->type == "$reduce_xnor" || cell->type == "$shift" || cell->type == "$shiftx" || - cell->type == "$shl" || cell->type == "$shr" || cell->type == "$sshl" || cell->type == "$sshr" || - cell->type == "$lt" || cell->type == "$le" || cell->type == "$ge" || cell->type == "$gt" || - cell->type == "$neg" || cell->type == "$add" || cell->type == "$sub" || - cell->type == "$mul" || cell->type == "$div" || cell->type == "$mod" || cell->type == "$pow") + if (cell->type.in(ID($reduce_xor), ID($reduce_xnor), ID($shift), ID($shiftx), ID($shl), ID($shr), ID($sshl), ID($sshr), + ID($lt), ID($le), ID($ge), ID($gt), ID($neg), ID($add), ID($sub), ID($mul), ID($div), ID($mod), ID($pow))) { - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec sig_b = cell->hasPort("\\B") ? assign_map(cell->getPort("\\B")) : RTLIL::SigSpec(); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_b = cell->hasPort(ID::B) ? assign_map(cell->getPort(ID::B)) : RTLIL::SigSpec(); - if (cell->type == "$shl" || cell->type == "$shr" || cell->type == "$sshl" || cell->type == "$sshr" || cell->type == "$shift" || cell->type == "$shiftx") + if (cell->type.in(ID($shl), ID($shr), ID($sshl), ID($sshr), ID($shift), ID($shiftx))) sig_a = RTLIL::SigSpec(); for (auto &bit : sig_a.to_sigbit_vector()) @@ -599,45 +737,66 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons found_the_x_bit: cover_list("opt.opt_expr.xbit", "$reduce_xor", "$reduce_xnor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$lt", "$le", "$ge", "$gt", "$neg", "$add", "$sub", "$mul", "$div", "$mod", "$pow", cell->type.str()); - if (cell->type == "$reduce_xor" || cell->type == "$reduce_xnor" || - cell->type == "$lt" || cell->type == "$le" || cell->type == "$ge" || cell->type == "$gt") - replace_cell(assign_map, module, cell, "x-bit in input", "\\Y", RTLIL::State::Sx); + if (cell->type.in(ID($reduce_xor), ID($reduce_xnor), ID($lt), ID($le), ID($ge), ID($gt))) + replace_cell(assign_map, module, cell, "x-bit in input", ID::Y, RTLIL::State::Sx); else - replace_cell(assign_map, module, cell, "x-bit in input", "\\Y", RTLIL::SigSpec(RTLIL::State::Sx, cell->getPort("\\Y").size())); + replace_cell(assign_map, module, cell, "x-bit in input", ID::Y, RTLIL::SigSpec(RTLIL::State::Sx, GetSize(cell->getPort(ID::Y)))); + goto next_cell; + } + } + + if (cell->type.in(ID($shiftx), ID($shift))) { + SigSpec sig_a = assign_map(cell->getPort(ID::A)); + int width; + bool trim_x = cell->type == ID($shiftx) || !keepdc; + bool trim_0 = cell->type == ID($shift); + for (width = GetSize(sig_a); width > 1; width--) { + if ((trim_x && sig_a[width-1] == State::Sx) || + (trim_0 && sig_a[width-1] == State::S0)) + continue; + break; + } + + if (width < GetSize(sig_a)) { + cover_list("opt.opt_expr.trim", "$shiftx", "$shift", cell->type.str()); + sig_a.remove(width, GetSize(sig_a)-width); + cell->setPort(ID::A, sig_a); + cell->setParam(ID(A_WIDTH), width); + did_something = true; goto next_cell; } } - if ((cell->type == "$_NOT_" || cell->type == "$not" || cell->type == "$logic_not") && cell->getPort("\\Y").size() == 1 && - invert_map.count(assign_map(cell->getPort("\\A"))) != 0) { + if (cell->type.in(ID($_NOT_), ID($not), ID($logic_not)) && GetSize(cell->getPort(ID::Y)) == 1 && + invert_map.count(assign_map(cell->getPort(ID::A))) != 0) { cover_list("opt.opt_expr.invert.double", "$_NOT_", "$not", "$logic_not", cell->type.str()); - replace_cell(assign_map, module, cell, "double_invert", "\\Y", invert_map.at(assign_map(cell->getPort("\\A")))); + replace_cell(assign_map, module, cell, "double_invert", ID::Y, invert_map.at(assign_map(cell->getPort(ID::A)))); goto next_cell; } - if ((cell->type == "$_MUX_" || cell->type == "$mux") && invert_map.count(assign_map(cell->getPort("\\S"))) != 0) { + if (cell->type.in(ID($_MUX_), ID($mux)) && invert_map.count(assign_map(cell->getPort(ID(S)))) != 0) { cover_list("opt.opt_expr.invert.muxsel", "$_MUX_", "$mux", cell->type.str()); - log("Optimizing away select inverter for %s cell `%s' in module `%s'.\n", log_id(cell->type), log_id(cell), log_id(module)); - RTLIL::SigSpec tmp = cell->getPort("\\A"); - cell->setPort("\\A", cell->getPort("\\B")); - cell->setPort("\\B", tmp); - cell->setPort("\\S", invert_map.at(assign_map(cell->getPort("\\S")))); + log_debug("Optimizing away select inverter for %s cell `%s' in module `%s'.\n", log_id(cell->type), log_id(cell), log_id(module)); + RTLIL::SigSpec tmp = cell->getPort(ID::A); + cell->setPort(ID::A, cell->getPort(ID::B)); + cell->setPort(ID::B, tmp); + cell->setPort(ID(S), invert_map.at(assign_map(cell->getPort(ID(S))))); did_something = true; goto next_cell; } - if (cell->type == "$_NOT_") { - RTLIL::SigSpec input = cell->getPort("\\A"); + if (cell->type == ID($_NOT_)) { + RTLIL::SigSpec input = cell->getPort(ID::A); assign_map.apply(input); if (input.match("1")) ACTION_DO_Y(0); if (input.match("0")) ACTION_DO_Y(1); if (input.match("*")) ACTION_DO_Y(x); } - if (cell->type == "$_AND_") { + if (cell->type == ID($_AND_)) { RTLIL::SigSpec input; - input.append(cell->getPort("\\B")); - input.append(cell->getPort("\\A")); + input.append(cell->getPort(ID::B)); + input.append(cell->getPort(ID::A)); assign_map.apply(input); if (input.match(" 0")) ACTION_DO_Y(0); if (input.match("0 ")) ACTION_DO_Y(0); @@ -649,14 +808,14 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (input.match(" *")) ACTION_DO_Y(0); if (input.match("* ")) ACTION_DO_Y(0); } - if (input.match(" 1")) ACTION_DO("\\Y", input.extract(1, 1)); - if (input.match("1 ")) ACTION_DO("\\Y", input.extract(0, 1)); + if (input.match(" 1")) ACTION_DO(ID::Y, input.extract(1, 1)); + if (input.match("1 ")) ACTION_DO(ID::Y, input.extract(0, 1)); } - if (cell->type == "$_OR_") { + if (cell->type == ID($_OR_)) { RTLIL::SigSpec input; - input.append(cell->getPort("\\B")); - input.append(cell->getPort("\\A")); + input.append(cell->getPort(ID::B)); + input.append(cell->getPort(ID::A)); assign_map.apply(input); if (input.match(" 1")) ACTION_DO_Y(1); if (input.match("1 ")) ACTION_DO_Y(1); @@ -668,14 +827,14 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (input.match(" *")) ACTION_DO_Y(1); if (input.match("* ")) ACTION_DO_Y(1); } - if (input.match(" 0")) ACTION_DO("\\Y", input.extract(1, 1)); - if (input.match("0 ")) ACTION_DO("\\Y", input.extract(0, 1)); + if (input.match(" 0")) ACTION_DO(ID::Y, input.extract(1, 1)); + if (input.match("0 ")) ACTION_DO(ID::Y, input.extract(0, 1)); } - if (cell->type == "$_XOR_") { + if (cell->type == ID($_XOR_)) { RTLIL::SigSpec input; - input.append(cell->getPort("\\B")); - input.append(cell->getPort("\\A")); + input.append(cell->getPort(ID::B)); + input.append(cell->getPort(ID::A)); assign_map.apply(input); if (input.match("00")) ACTION_DO_Y(0); if (input.match("01")) ACTION_DO_Y(1); @@ -683,27 +842,27 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (input.match("11")) ACTION_DO_Y(0); if (input.match(" *")) ACTION_DO_Y(x); if (input.match("* ")) ACTION_DO_Y(x); - if (input.match(" 0")) ACTION_DO("\\Y", input.extract(1, 1)); - if (input.match("0 ")) ACTION_DO("\\Y", input.extract(0, 1)); + if (input.match(" 0")) ACTION_DO(ID::Y, input.extract(1, 1)); + if (input.match("0 ")) ACTION_DO(ID::Y, input.extract(0, 1)); } - if (cell->type == "$_MUX_") { + if (cell->type == ID($_MUX_)) { RTLIL::SigSpec input; - input.append(cell->getPort("\\S")); - input.append(cell->getPort("\\B")); - input.append(cell->getPort("\\A")); + input.append(cell->getPort(ID(S))); + input.append(cell->getPort(ID::B)); + input.append(cell->getPort(ID::A)); assign_map.apply(input); if (input.extract(2, 1) == input.extract(1, 1)) - ACTION_DO("\\Y", input.extract(2, 1)); - if (input.match(" 0")) ACTION_DO("\\Y", input.extract(2, 1)); - if (input.match(" 1")) ACTION_DO("\\Y", input.extract(1, 1)); - if (input.match("01 ")) ACTION_DO("\\Y", input.extract(0, 1)); + ACTION_DO(ID::Y, input.extract(2, 1)); + if (input.match(" 0")) ACTION_DO(ID::Y, input.extract(2, 1)); + if (input.match(" 1")) ACTION_DO(ID::Y, input.extract(1, 1)); + if (input.match("01 ")) ACTION_DO(ID::Y, input.extract(0, 1)); if (input.match("10 ")) { cover("opt.opt_expr.mux_to_inv"); - cell->type = "$_NOT_"; - cell->setPort("\\A", input.extract(0, 1)); - cell->unsetPort("\\B"); - cell->unsetPort("\\S"); + cell->type = ID($_NOT_); + cell->setPort(ID::A, input.extract(0, 1)); + cell->unsetPort(ID::B); + cell->unsetPort(ID(S)); goto next_cell; } if (input.match("11 ")) ACTION_DO_Y(1); @@ -712,21 +871,38 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (input.match("01*")) ACTION_DO_Y(x); if (input.match("10*")) ACTION_DO_Y(x); if (mux_undef) { - if (input.match("* ")) ACTION_DO("\\Y", input.extract(1, 1)); - if (input.match(" * ")) ACTION_DO("\\Y", input.extract(2, 1)); - if (input.match(" *")) ACTION_DO("\\Y", input.extract(2, 1)); + if (input.match("* ")) ACTION_DO(ID::Y, input.extract(1, 1)); + if (input.match(" * ")) ACTION_DO(ID::Y, input.extract(2, 1)); + if (input.match(" *")) ACTION_DO(ID::Y, input.extract(2, 1)); + } + } + + if (cell->type.in(ID($_TBUF_), ID($tribuf))) { + RTLIL::SigSpec input = cell->getPort(cell->type == ID($_TBUF_) ? ID(E) : ID(EN)); + RTLIL::SigSpec a = cell->getPort(ID::A); + assign_map.apply(input); + assign_map.apply(a); + if (input == State::S1) + ACTION_DO(ID::Y, cell->getPort(ID::A)); + if (input == State::S0 && !a.is_fully_undef()) { + cover("opt.opt_expr.action_" S__LINE__); + log_debug("Replacing data input of %s cell `%s' in module `%s' with constant undef.\n", + cell->type.c_str(), cell->name.c_str(), module->name.c_str()); + cell->setPort(ID::A, SigSpec(State::Sx, GetSize(a))); + did_something = true; + goto next_cell; } } - if (cell->type == "$eq" || cell->type == "$ne" || cell->type == "$eqx" || cell->type == "$nex") + if (cell->type.in(ID($eq), ID($ne), ID($eqx), ID($nex))) { - RTLIL::SigSpec a = cell->getPort("\\A"); - RTLIL::SigSpec b = cell->getPort("\\B"); + RTLIL::SigSpec a = cell->getPort(ID::A); + RTLIL::SigSpec b = cell->getPort(ID::B); - if (cell->parameters["\\A_WIDTH"].as_int() != cell->parameters["\\B_WIDTH"].as_int()) { - int width = max(cell->parameters["\\A_WIDTH"].as_int(), cell->parameters["\\B_WIDTH"].as_int()); - a.extend_u0(width, cell->parameters["\\A_SIGNED"].as_bool() && cell->parameters["\\B_SIGNED"].as_bool()); - b.extend_u0(width, cell->parameters["\\A_SIGNED"].as_bool() && cell->parameters["\\B_SIGNED"].as_bool()); + if (cell->parameters[ID(A_WIDTH)].as_int() != cell->parameters[ID(B_WIDTH)].as_int()) { + int width = max(cell->parameters[ID(A_WIDTH)].as_int(), cell->parameters[ID(B_WIDTH)].as_int()); + a.extend_u0(width, cell->parameters[ID(A_SIGNED)].as_bool() && cell->parameters[ID(B_SIGNED)].as_bool()); + b.extend_u0(width, cell->parameters[ID(A_SIGNED)].as_bool() && cell->parameters[ID(B_SIGNED)].as_bool()); } RTLIL::SigSpec new_a, new_b; @@ -735,9 +911,9 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons for (int i = 0; i < GetSize(a); i++) { if (a[i].wire == NULL && b[i].wire == NULL && a[i] != b[i] && a[i].data <= RTLIL::State::S1 && b[i].data <= RTLIL::State::S1) { cover_list("opt.opt_expr.eqneq.isneq", "$eq", "$ne", "$eqx", "$nex", cell->type.str()); - RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S0 : RTLIL::State::S1); - new_y.extend_u0(cell->parameters["\\Y_WIDTH"].as_int(), false); - replace_cell(assign_map, module, cell, "isneq", "\\Y", new_y); + RTLIL::SigSpec new_y = RTLIL::SigSpec(cell->type.in(ID($eq), ID($eqx)) ? RTLIL::State::S0 : RTLIL::State::S1); + new_y.extend_u0(cell->parameters[ID(Y_WIDTH)].as_int(), false); + replace_cell(assign_map, module, cell, "isneq", ID::Y, new_y); goto next_cell; } if (a[i] == b[i]) @@ -748,83 +924,87 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (new_a.size() == 0) { cover_list("opt.opt_expr.eqneq.empty", "$eq", "$ne", "$eqx", "$nex", cell->type.str()); - RTLIL::SigSpec new_y = RTLIL::SigSpec((cell->type == "$eq" || cell->type == "$eqx") ? RTLIL::State::S1 : RTLIL::State::S0); - new_y.extend_u0(cell->parameters["\\Y_WIDTH"].as_int(), false); - replace_cell(assign_map, module, cell, "empty", "\\Y", new_y); + RTLIL::SigSpec new_y = RTLIL::SigSpec(cell->type.in(ID($eq), ID($eqx)) ? RTLIL::State::S1 : RTLIL::State::S0); + new_y.extend_u0(cell->parameters[ID(Y_WIDTH)].as_int(), false); + replace_cell(assign_map, module, cell, "empty", ID::Y, new_y); goto next_cell; } if (new_a.size() < a.size() || new_b.size() < b.size()) { cover_list("opt.opt_expr.eqneq.resize", "$eq", "$ne", "$eqx", "$nex", cell->type.str()); - cell->setPort("\\A", new_a); - cell->setPort("\\B", new_b); - cell->parameters["\\A_WIDTH"] = new_a.size(); - cell->parameters["\\B_WIDTH"] = new_b.size(); + cell->setPort(ID::A, new_a); + cell->setPort(ID::B, new_b); + cell->parameters[ID(A_WIDTH)] = new_a.size(); + cell->parameters[ID(B_WIDTH)] = new_b.size(); } } - if ((cell->type == "$eq" || cell->type == "$ne") && cell->parameters["\\Y_WIDTH"].as_int() == 1 && - cell->parameters["\\A_WIDTH"].as_int() == 1 && cell->parameters["\\B_WIDTH"].as_int() == 1) + if (cell->type.in(ID($eq), ID($ne)) && cell->parameters[ID(Y_WIDTH)].as_int() == 1 && + cell->parameters[ID(A_WIDTH)].as_int() == 1 && cell->parameters[ID(B_WIDTH)].as_int() == 1) { - RTLIL::SigSpec a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec b = assign_map(cell->getPort(ID::B)); if (a.is_fully_const() && !b.is_fully_const()) { cover_list("opt.opt_expr.eqneq.swapconst", "$eq", "$ne", cell->type.str()); - cell->setPort("\\A", b); - cell->setPort("\\B", a); + cell->setPort(ID::A, b); + cell->setPort(ID::B, a); std::swap(a, b); } if (b.is_fully_const()) { - if (b.as_bool() == (cell->type == "$eq")) { + if (b.is_fully_undef()) { + RTLIL::SigSpec input = b; + ACTION_DO(ID::Y, Const(State::Sx, GetSize(cell->getPort(ID::Y)))); + } else + if (b.as_bool() == (cell->type == ID($eq))) { RTLIL::SigSpec input = b; - ACTION_DO("\\Y", cell->getPort("\\A")); + ACTION_DO(ID::Y, cell->getPort(ID::A)); } else { cover_list("opt.opt_expr.eqneq.isnot", "$eq", "$ne", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module)); - cell->type = "$not"; - cell->parameters.erase("\\B_WIDTH"); - cell->parameters.erase("\\B_SIGNED"); - cell->unsetPort("\\B"); + log_debug("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module)); + cell->type = ID($not); + cell->parameters.erase(ID(B_WIDTH)); + cell->parameters.erase(ID(B_SIGNED)); + cell->unsetPort(ID::B); did_something = true; } goto next_cell; } } - if ((cell->type == "$eq" || cell->type == "$ne") && - (assign_map(cell->getPort("\\A")).is_fully_zero() || assign_map(cell->getPort("\\B")).is_fully_zero())) + if (cell->type.in(ID($eq), ID($ne)) && + (assign_map(cell->getPort(ID::A)).is_fully_zero() || assign_map(cell->getPort(ID::B)).is_fully_zero())) { cover_list("opt.opt_expr.eqneq.cmpzero", "$eq", "$ne", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with %s.\n", log_id(cell->type), log_id(cell), - log_id(module), "$eq" ? "$logic_not" : "$reduce_bool"); - cell->type = cell->type == "$eq" ? "$logic_not" : "$reduce_bool"; - if (assign_map(cell->getPort("\\A")).is_fully_zero()) { - cell->setPort("\\A", cell->getPort("\\B")); - cell->setParam("\\A_SIGNED", cell->getParam("\\B_SIGNED")); - cell->setParam("\\A_WIDTH", cell->getParam("\\B_WIDTH")); + log_debug("Replacing %s cell `%s' in module `%s' with %s.\n", log_id(cell->type), log_id(cell), + log_id(module), cell->type == ID($eq) ? "$logic_not" : "$reduce_bool"); + cell->type = cell->type == ID($eq) ? ID($logic_not) : ID($reduce_bool); + if (assign_map(cell->getPort(ID::A)).is_fully_zero()) { + cell->setPort(ID::A, cell->getPort(ID::B)); + cell->setParam(ID(A_SIGNED), cell->getParam(ID(B_SIGNED))); + cell->setParam(ID(A_WIDTH), cell->getParam(ID(B_WIDTH))); } - cell->unsetPort("\\B"); - cell->unsetParam("\\B_SIGNED"); - cell->unsetParam("\\B_WIDTH"); + cell->unsetPort(ID::B); + cell->unsetParam(ID(B_SIGNED)); + cell->unsetParam(ID(B_WIDTH)); did_something = true; goto next_cell; } - if (cell->type.in("$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx") && assign_map(cell->getPort("\\B")).is_fully_const()) + if (cell->type.in(ID($shl), ID($shr), ID($sshl), ID($sshr), ID($shift), ID($shiftx)) && assign_map(cell->getPort(ID::B)).is_fully_const()) { - bool sign_ext = cell->type == "$sshr" && cell->getParam("\\A_SIGNED").as_bool(); - int shift_bits = assign_map(cell->getPort("\\B")).as_int(cell->type.in("$shift", "$shiftx") && cell->getParam("\\B_SIGNED").as_bool()); + bool sign_ext = cell->type == ID($sshr) && cell->getParam(ID(A_SIGNED)).as_bool(); + int shift_bits = assign_map(cell->getPort(ID::B)).as_int(cell->type.in(ID($shift), ID($shiftx)) && cell->getParam(ID(B_SIGNED)).as_bool()); - if (cell->type.in("$shl", "$sshl")) + if (cell->type.in(ID($shl), ID($sshl))) shift_bits *= -1; - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec sig_y(cell->type == "$shiftx" ? RTLIL::State::Sx : RTLIL::State::S0, cell->getParam("\\Y_WIDTH").as_int()); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_y(cell->type == ID($shiftx) ? RTLIL::State::Sx : RTLIL::State::S0, cell->getParam(ID(Y_WIDTH)).as_int()); if (GetSize(sig_a) < GetSize(sig_y)) - sig_a.extend_u0(GetSize(sig_y), cell->getParam("\\A_SIGNED").as_bool()); + sig_a.extend_u0(GetSize(sig_y), cell->getParam(ID(A_SIGNED)).as_bool()); for (int i = 0; i < GetSize(sig_y); i++) { int idx = i + shift_bits; @@ -836,10 +1016,10 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons cover_list("opt.opt_expr.constshift", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", cell->type.str()); - log("Replacing %s cell `%s' (B=%s, SHR=%d) in module `%s' with fixed wiring: %s\n", - log_id(cell->type), log_id(cell), log_signal(assign_map(cell->getPort("\\B"))), shift_bits, log_id(module), log_signal(sig_y)); + log_debug("Replacing %s cell `%s' (B=%s, SHR=%d) in module `%s' with fixed wiring: %s\n", + log_id(cell->type), log_id(cell), log_signal(assign_map(cell->getPort(ID::B))), shift_bits, log_id(module), log_signal(sig_y)); - module->connect(cell->getPort("\\Y"), sig_y); + module->connect(cell->getPort(ID::Y), sig_y); module->remove(cell); did_something = true; @@ -852,41 +1032,41 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons bool identity_wrt_b = false; bool arith_inverse = false; - if (cell->type == "$add" || cell->type == "$sub" || cell->type == "$or" || cell->type == "$xor") + if (cell->type.in(ID($add), ID($sub), ID($or), ID($xor))) { - RTLIL::SigSpec a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec b = assign_map(cell->getPort(ID::B)); - if (cell->type != "$sub" && a.is_fully_const() && a.as_bool() == false) + if (cell->type != ID($sub) && a.is_fully_const() && a.as_bool() == false) identity_wrt_b = true; if (b.is_fully_const() && b.as_bool() == false) identity_wrt_a = true; } - if (cell->type == "$shl" || cell->type == "$shr" || cell->type == "$sshl" || cell->type == "$sshr" || cell->type == "$shift" || cell->type == "$shiftx") + if (cell->type.in(ID($shl), ID($shr), ID($sshl), ID($sshr), ID($shift), ID($shiftx))) { - RTLIL::SigSpec b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec b = assign_map(cell->getPort(ID::B)); if (b.is_fully_const() && b.as_bool() == false) identity_wrt_a = true; } - if (cell->type == "$mul") + if (cell->type == ID($mul)) { - RTLIL::SigSpec a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec b = assign_map(cell->getPort(ID::B)); - if (a.is_fully_const() && is_one_or_minus_one(a.as_const(), cell->getParam("\\A_SIGNED").as_bool(), arith_inverse)) + if (a.is_fully_const() && is_one_or_minus_one(a.as_const(), cell->getParam(ID(A_SIGNED)).as_bool(), arith_inverse)) identity_wrt_b = true; else - if (b.is_fully_const() && is_one_or_minus_one(b.as_const(), cell->getParam("\\B_SIGNED").as_bool(), arith_inverse)) + if (b.is_fully_const() && is_one_or_minus_one(b.as_const(), cell->getParam(ID(B_SIGNED)).as_bool(), arith_inverse)) identity_wrt_a = true; } - if (cell->type == "$div") + if (cell->type == ID($div)) { - RTLIL::SigSpec b = assign_map(cell->getPort("\\B")); + RTLIL::SigSpec b = assign_map(cell->getPort(ID::B)); if (b.is_fully_const() && b.size() <= 32 && b.as_int() == 1) identity_wrt_a = true; @@ -899,19 +1079,19 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (identity_wrt_b) cover_list("opt.opt_expr.identwrt.b", "$add", "$sub", "$or", "$xor", "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", "$mul", "$div", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with identity for port %c.\n", + log_debug("Replacing %s cell `%s' in module `%s' with identity for port %c.\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str(), identity_wrt_a ? 'A' : 'B'); if (!identity_wrt_a) { - cell->setPort("\\A", cell->getPort("\\B")); - cell->parameters.at("\\A_WIDTH") = cell->parameters.at("\\B_WIDTH"); - cell->parameters.at("\\A_SIGNED") = cell->parameters.at("\\B_SIGNED"); + cell->setPort(ID::A, cell->getPort(ID::B)); + cell->parameters.at(ID(A_WIDTH)) = cell->parameters.at(ID(B_WIDTH)); + cell->parameters.at(ID(A_SIGNED)) = cell->parameters.at(ID(B_SIGNED)); } - cell->type = arith_inverse ? "$neg" : "$pos"; - cell->unsetPort("\\B"); - cell->parameters.erase("\\B_WIDTH"); - cell->parameters.erase("\\B_SIGNED"); + cell->type = arith_inverse ? ID($neg) : ID($pos); + cell->unsetPort(ID::B); + cell->parameters.erase(ID(B_WIDTH)); + cell->parameters.erase(ID(B_SIGNED)); cell->check(); did_something = true; @@ -919,91 +1099,91 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons } } - if (mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && - cell->getPort("\\A") == RTLIL::SigSpec(0, 1) && cell->getPort("\\B") == RTLIL::SigSpec(1, 1)) { + if (mux_bool && cell->type.in(ID($mux), ID($_MUX_)) && + cell->getPort(ID::A) == State::S0 && cell->getPort(ID::B) == State::S1) { cover_list("opt.opt_expr.mux_bool", "$mux", "$_MUX_", cell->type.str()); - replace_cell(assign_map, module, cell, "mux_bool", "\\Y", cell->getPort("\\S")); + replace_cell(assign_map, module, cell, "mux_bool", ID::Y, cell->getPort(ID(S))); goto next_cell; } - if (mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && - cell->getPort("\\A") == RTLIL::SigSpec(1, 1) && cell->getPort("\\B") == RTLIL::SigSpec(0, 1)) { + if (mux_bool && cell->type.in(ID($mux), ID($_MUX_)) && + cell->getPort(ID::A) == State::S1 && cell->getPort(ID::B) == State::S0) { cover_list("opt.opt_expr.mux_invert", "$mux", "$_MUX_", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module)); - cell->setPort("\\A", cell->getPort("\\S")); - cell->unsetPort("\\B"); - cell->unsetPort("\\S"); - if (cell->type == "$mux") { - Const width = cell->parameters["\\WIDTH"]; - cell->parameters["\\A_WIDTH"] = width; - cell->parameters["\\Y_WIDTH"] = width; - cell->parameters["\\A_SIGNED"] = 0; - cell->parameters.erase("\\WIDTH"); - cell->type = "$not"; + log_debug("Replacing %s cell `%s' in module `%s' with inverter.\n", log_id(cell->type), log_id(cell), log_id(module)); + cell->setPort(ID::A, cell->getPort(ID(S))); + cell->unsetPort(ID::B); + cell->unsetPort(ID(S)); + if (cell->type == ID($mux)) { + Const width = cell->parameters[ID(WIDTH)]; + cell->parameters[ID(A_WIDTH)] = width; + cell->parameters[ID(Y_WIDTH)] = width; + cell->parameters[ID(A_SIGNED)] = 0; + cell->parameters.erase(ID(WIDTH)); + cell->type = ID($not); } else - cell->type = "$_NOT_"; + cell->type = ID($_NOT_); did_something = true; goto next_cell; } - if (consume_x && mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && cell->getPort("\\A") == RTLIL::SigSpec(0, 1)) { + if (consume_x && mux_bool && cell->type.in(ID($mux), ID($_MUX_)) && cell->getPort(ID::A) == State::S0) { cover_list("opt.opt_expr.mux_and", "$mux", "$_MUX_", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with and-gate.\n", log_id(cell->type), log_id(cell), log_id(module)); - cell->setPort("\\A", cell->getPort("\\S")); - cell->unsetPort("\\S"); - if (cell->type == "$mux") { - Const width = cell->parameters["\\WIDTH"]; - cell->parameters["\\A_WIDTH"] = width; - cell->parameters["\\B_WIDTH"] = width; - cell->parameters["\\Y_WIDTH"] = width; - cell->parameters["\\A_SIGNED"] = 0; - cell->parameters["\\B_SIGNED"] = 0; - cell->parameters.erase("\\WIDTH"); - cell->type = "$and"; + log_debug("Replacing %s cell `%s' in module `%s' with and-gate.\n", log_id(cell->type), log_id(cell), log_id(module)); + cell->setPort(ID::A, cell->getPort(ID(S))); + cell->unsetPort(ID(S)); + if (cell->type == ID($mux)) { + Const width = cell->parameters[ID(WIDTH)]; + cell->parameters[ID(A_WIDTH)] = width; + cell->parameters[ID(B_WIDTH)] = width; + cell->parameters[ID(Y_WIDTH)] = width; + cell->parameters[ID(A_SIGNED)] = 0; + cell->parameters[ID(B_SIGNED)] = 0; + cell->parameters.erase(ID(WIDTH)); + cell->type = ID($and); } else - cell->type = "$_AND_"; + cell->type = ID($_AND_); did_something = true; goto next_cell; } - if (consume_x && mux_bool && (cell->type == "$mux" || cell->type == "$_MUX_") && cell->getPort("\\B") == RTLIL::SigSpec(1, 1)) { + if (consume_x && mux_bool && cell->type.in(ID($mux), ID($_MUX_)) && cell->getPort(ID::B) == State::S1) { cover_list("opt.opt_expr.mux_or", "$mux", "$_MUX_", cell->type.str()); - log("Replacing %s cell `%s' in module `%s' with or-gate.\n", log_id(cell->type), log_id(cell), log_id(module)); - cell->setPort("\\B", cell->getPort("\\S")); - cell->unsetPort("\\S"); - if (cell->type == "$mux") { - Const width = cell->parameters["\\WIDTH"]; - cell->parameters["\\A_WIDTH"] = width; - cell->parameters["\\B_WIDTH"] = width; - cell->parameters["\\Y_WIDTH"] = width; - cell->parameters["\\A_SIGNED"] = 0; - cell->parameters["\\B_SIGNED"] = 0; - cell->parameters.erase("\\WIDTH"); - cell->type = "$or"; + log_debug("Replacing %s cell `%s' in module `%s' with or-gate.\n", log_id(cell->type), log_id(cell), log_id(module)); + cell->setPort(ID::B, cell->getPort(ID(S))); + cell->unsetPort(ID(S)); + if (cell->type == ID($mux)) { + Const width = cell->parameters[ID(WIDTH)]; + cell->parameters[ID(A_WIDTH)] = width; + cell->parameters[ID(B_WIDTH)] = width; + cell->parameters[ID(Y_WIDTH)] = width; + cell->parameters[ID(A_SIGNED)] = 0; + cell->parameters[ID(B_SIGNED)] = 0; + cell->parameters.erase(ID(WIDTH)); + cell->type = ID($or); } else - cell->type = "$_OR_"; + cell->type = ID($_OR_); did_something = true; goto next_cell; } - if (mux_undef && (cell->type == "$mux" || cell->type == "$pmux")) { + if (mux_undef && cell->type.in(ID($mux), ID($pmux))) { RTLIL::SigSpec new_a, new_b, new_s; - int width = cell->getPort("\\A").size(); - if ((cell->getPort("\\A").is_fully_undef() && cell->getPort("\\B").is_fully_undef()) || - cell->getPort("\\S").is_fully_undef()) { + int width = GetSize(cell->getPort(ID::A)); + if ((cell->getPort(ID::A).is_fully_undef() && cell->getPort(ID::B).is_fully_undef()) || + cell->getPort(ID(S)).is_fully_undef()) { cover_list("opt.opt_expr.mux_undef", "$mux", "$pmux", cell->type.str()); - replace_cell(assign_map, module, cell, "mux_undef", "\\Y", cell->getPort("\\A")); + replace_cell(assign_map, module, cell, "mux_undef", ID::Y, cell->getPort(ID::A)); goto next_cell; } - for (int i = 0; i < cell->getPort("\\S").size(); i++) { - RTLIL::SigSpec old_b = cell->getPort("\\B").extract(i*width, width); - RTLIL::SigSpec old_s = cell->getPort("\\S").extract(i, 1); + for (int i = 0; i < cell->getPort(ID(S)).size(); i++) { + RTLIL::SigSpec old_b = cell->getPort(ID::B).extract(i*width, width); + RTLIL::SigSpec old_s = cell->getPort(ID(S)).extract(i, 1); if (old_b.is_fully_undef() || old_s.is_fully_undef()) continue; new_b.append(old_b); new_s.append(old_s); } - new_a = cell->getPort("\\A"); + new_a = cell->getPort(ID::A); if (new_a.is_fully_undef() && new_s.size() > 0) { new_a = new_b.extract((new_s.size()-1)*width, width); new_b = new_b.extract(0, (new_s.size()-1)*width); @@ -1011,27 +1191,27 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons } if (new_s.size() == 0) { cover_list("opt.opt_expr.mux_empty", "$mux", "$pmux", cell->type.str()); - replace_cell(assign_map, module, cell, "mux_empty", "\\Y", new_a); + replace_cell(assign_map, module, cell, "mux_empty", ID::Y, new_a); goto next_cell; } if (new_a == RTLIL::SigSpec(RTLIL::State::S0) && new_b == RTLIL::SigSpec(RTLIL::State::S1)) { cover_list("opt.opt_expr.mux_sel01", "$mux", "$pmux", cell->type.str()); - replace_cell(assign_map, module, cell, "mux_sel01", "\\Y", new_s); + replace_cell(assign_map, module, cell, "mux_sel01", ID::Y, new_s); goto next_cell; } - if (cell->getPort("\\S").size() != new_s.size()) { + if (cell->getPort(ID(S)).size() != new_s.size()) { cover_list("opt.opt_expr.mux_reduce", "$mux", "$pmux", cell->type.str()); - log("Optimized away %d select inputs of %s cell `%s' in module `%s'.\n", - GetSize(cell->getPort("\\S")) - GetSize(new_s), log_id(cell->type), log_id(cell), log_id(module)); - cell->setPort("\\A", new_a); - cell->setPort("\\B", new_b); - cell->setPort("\\S", new_s); + log_debug("Optimized away %d select inputs of %s cell `%s' in module `%s'.\n", + GetSize(cell->getPort(ID(S))) - GetSize(new_s), log_id(cell->type), log_id(cell), log_id(module)); + cell->setPort(ID::A, new_a); + cell->setPort(ID::B, new_b); + cell->setPort(ID(S), new_s); if (new_s.size() > 1) { - cell->type = "$pmux"; - cell->parameters["\\S_WIDTH"] = new_s.size(); + cell->type = ID($pmux); + cell->parameters[ID(S_WIDTH)] = new_s.size(); } else { - cell->type = "$mux"; - cell->parameters.erase("\\S_WIDTH"); + cell->type = ID($mux); + cell->parameters.erase(ID(S_WIDTH)); } did_something = true; } @@ -1039,30 +1219,30 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons #define FOLD_1ARG_CELL(_t) \ if (cell->type == "$" #_t) { \ - RTLIL::SigSpec a = cell->getPort("\\A"); \ + RTLIL::SigSpec a = cell->getPort(ID::A); \ assign_map.apply(a); \ if (a.is_fully_const()) { \ RTLIL::Const dummy_arg(RTLIL::State::S0, 1); \ RTLIL::SigSpec y(RTLIL::const_ ## _t(a.as_const(), dummy_arg, \ - cell->parameters["\\A_SIGNED"].as_bool(), false, \ - cell->parameters["\\Y_WIDTH"].as_int())); \ + cell->parameters[ID(A_SIGNED)].as_bool(), false, \ + cell->parameters[ID(Y_WIDTH)].as_int())); \ cover("opt.opt_expr.const.$" #_t); \ - replace_cell(assign_map, module, cell, stringf("%s", log_signal(a)), "\\Y", y); \ + replace_cell(assign_map, module, cell, stringf("%s", log_signal(a)), ID::Y, y); \ goto next_cell; \ } \ } #define FOLD_2ARG_CELL(_t) \ if (cell->type == "$" #_t) { \ - RTLIL::SigSpec a = cell->getPort("\\A"); \ - RTLIL::SigSpec b = cell->getPort("\\B"); \ + RTLIL::SigSpec a = cell->getPort(ID::A); \ + RTLIL::SigSpec b = cell->getPort(ID::B); \ assign_map.apply(a), assign_map.apply(b); \ if (a.is_fully_const() && b.is_fully_const()) { \ RTLIL::SigSpec y(RTLIL::const_ ## _t(a.as_const(), b.as_const(), \ - cell->parameters["\\A_SIGNED"].as_bool(), \ - cell->parameters["\\B_SIGNED"].as_bool(), \ - cell->parameters["\\Y_WIDTH"].as_int())); \ + cell->parameters[ID(A_SIGNED)].as_bool(), \ + cell->parameters[ID(B_SIGNED)].as_bool(), \ + cell->parameters[ID(Y_WIDTH)].as_int())); \ cover("opt.opt_expr.const.$" #_t); \ - replace_cell(assign_map, module, cell, stringf("%s, %s", log_signal(a), log_signal(b)), "\\Y", y); \ + replace_cell(assign_map, module, cell, stringf("%s, %s", log_signal(a), log_signal(b)), ID::Y, y); \ goto next_cell; \ } \ } @@ -1108,25 +1288,25 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons FOLD_1ARG_CELL(neg) // be very conservative with optimizing $mux cells as we do not want to break mux trees - if (cell->type == "$mux") { - RTLIL::SigSpec input = assign_map(cell->getPort("\\S")); - RTLIL::SigSpec inA = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec inB = assign_map(cell->getPort("\\B")); + if (cell->type == ID($mux)) { + RTLIL::SigSpec input = assign_map(cell->getPort(ID(S))); + RTLIL::SigSpec inA = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec inB = assign_map(cell->getPort(ID::B)); if (input.is_fully_const()) - ACTION_DO("\\Y", input.as_bool() ? cell->getPort("\\B") : cell->getPort("\\A")); + ACTION_DO(ID::Y, input.as_bool() ? cell->getPort(ID::B) : cell->getPort(ID::A)); else if (inA == inB) - ACTION_DO("\\Y", cell->getPort("\\A")); + ACTION_DO(ID::Y, cell->getPort(ID::A)); } - if (!keepdc && cell->type == "$mul") + if (!keepdc && cell->type == ID($mul)) { - bool a_signed = cell->parameters["\\A_SIGNED"].as_bool(); - bool b_signed = cell->parameters["\\B_SIGNED"].as_bool(); + bool a_signed = cell->parameters[ID(A_SIGNED)].as_bool(); + bool b_signed = cell->parameters[ID(B_SIGNED)].as_bool(); bool swapped_ab = false; - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec sig_b = assign_map(cell->getPort("\\B")); - RTLIL::SigSpec sig_y = assign_map(cell->getPort("\\Y")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); + RTLIL::SigSpec sig_y = assign_map(cell->getPort(ID::Y)); if (sig_b.is_fully_const() && sig_b.size() <= 32) std::swap(sig_a, sig_b), std::swap(a_signed, b_signed), swapped_ab = true; @@ -1139,7 +1319,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons { cover("opt.opt_expr.mul_shift.zero"); - log("Replacing multiply-by-zero cell `%s' in module `%s' with zero-driver.\n", + log_debug("Replacing multiply-by-zero cell `%s' in module `%s' with zero-driver.\n", cell->name.c_str(), module->name.c_str()); module->connect(RTLIL::SigSig(sig_y, RTLIL::SigSpec(0, sig_y.size()))); @@ -1157,13 +1337,13 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons else cover("opt.opt_expr.mul_shift.unswapped"); - log("Replacing multiply-by-%d cell `%s' in module `%s' with shift-by-%d.\n", + log_debug("Replacing multiply-by-%d cell `%s' in module `%s' with shift-by-%d.\n", a_val, cell->name.c_str(), module->name.c_str(), i); if (!swapped_ab) { - cell->setPort("\\A", cell->getPort("\\B")); - cell->parameters.at("\\A_WIDTH") = cell->parameters.at("\\B_WIDTH"); - cell->parameters.at("\\A_SIGNED") = cell->parameters.at("\\B_SIGNED"); + cell->setPort(ID::A, cell->getPort(ID::B)); + cell->parameters.at(ID(A_WIDTH)) = cell->parameters.at(ID(B_WIDTH)); + cell->parameters.at(ID(A_SIGNED)) = cell->parameters.at(ID(B_SIGNED)); } std::vector<RTLIL::SigBit> new_b = RTLIL::SigSpec(i, 6); @@ -1171,10 +1351,10 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons while (GetSize(new_b) > 1 && new_b.back() == RTLIL::State::S0) new_b.pop_back(); - cell->type = "$shl"; - cell->parameters["\\B_WIDTH"] = GetSize(new_b); - cell->parameters["\\B_SIGNED"] = false; - cell->setPort("\\B", new_b); + cell->type = ID($shl); + cell->parameters[ID(B_WIDTH)] = GetSize(new_b); + cell->parameters[ID(B_SIGNED)] = false; + cell->setPort(ID::B, new_b); cell->check(); did_something = true; @@ -1183,11 +1363,11 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons } } - if (!keepdc && cell->type.in("$div", "$mod")) + if (!keepdc && cell->type.in(ID($div), ID($mod))) { - bool b_signed = cell->parameters["\\B_SIGNED"].as_bool(); - SigSpec sig_b = assign_map(cell->getPort("\\B")); - SigSpec sig_y = assign_map(cell->getPort("\\Y")); + bool b_signed = cell->parameters[ID(B_SIGNED)].as_bool(); + SigSpec sig_b = assign_map(cell->getPort(ID::B)); + SigSpec sig_y = assign_map(cell->getPort(ID::Y)); if (sig_b.is_fully_def() && sig_b.size() <= 32) { @@ -1197,7 +1377,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons { cover("opt.opt_expr.divmod_zero"); - log("Replacing divide-by-zero cell `%s' in module `%s' with undef-driver.\n", + log_debug("Replacing divide-by-zero cell `%s' in module `%s' with undef-driver.\n", cell->name.c_str(), module->name.c_str()); module->connect(RTLIL::SigSig(sig_y, RTLIL::SigSpec(State::Sx, sig_y.size()))); @@ -1210,11 +1390,11 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons for (int i = 1; i < (b_signed ? sig_b.size()-1 : sig_b.size()); i++) if (b_val == (1 << i)) { - if (cell->type == "$div") + if (cell->type == ID($div)) { cover("opt.opt_expr.div_shift"); - log("Replacing divide-by-%d cell `%s' in module `%s' with shift-by-%d.\n", + log_debug("Replacing divide-by-%d cell `%s' in module `%s' with shift-by-%d.\n", b_val, cell->name.c_str(), module->name.c_str(), i); std::vector<RTLIL::SigBit> new_b = RTLIL::SigSpec(i, 6); @@ -1222,17 +1402,17 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons while (GetSize(new_b) > 1 && new_b.back() == RTLIL::State::S0) new_b.pop_back(); - cell->type = "$shr"; - cell->parameters["\\B_WIDTH"] = GetSize(new_b); - cell->parameters["\\B_SIGNED"] = false; - cell->setPort("\\B", new_b); + cell->type = ID($shr); + cell->parameters[ID(B_WIDTH)] = GetSize(new_b); + cell->parameters[ID(B_SIGNED)] = false; + cell->setPort(ID::B, new_b); cell->check(); } else { cover("opt.opt_expr.mod_mask"); - log("Replacing modulo-by-%d cell `%s' in module `%s' with bitmask.\n", + log_debug("Replacing modulo-by-%d cell `%s' in module `%s' with bitmask.\n", b_val, cell->name.c_str(), module->name.c_str()); std::vector<RTLIL::SigBit> new_b = RTLIL::SigSpec(State::S1, i); @@ -1240,9 +1420,9 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (b_signed) new_b.push_back(State::S0); - cell->type = "$and"; - cell->parameters["\\B_WIDTH"] = GetSize(new_b); - cell->setPort("\\B", new_b); + cell->type = ID($and); + cell->parameters[ID(B_WIDTH)] = GetSize(new_b); + cell->setPort(ID::B, new_b); cell->check(); } @@ -1254,7 +1434,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons // remove redundant pairs of bits in ==, ===, !=, and !== // replace cell with const driver if inputs can't be equal - if (do_fine && cell->type.in("$eq", "$ne", "$eqx", "$nex")) + if (do_fine && cell->type.in(ID($eq), ID($ne), ID($eqx), ID($nex))) { pool<pair<SigBit, SigBit>> redundant_cache; mfp<SigBit> contradiction_cache; @@ -1262,14 +1442,14 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons contradiction_cache.promote(State::S0); contradiction_cache.promote(State::S1); - int a_width = cell->getParam("\\A_WIDTH").as_int(); - int b_width = cell->getParam("\\B_WIDTH").as_int(); + int a_width = cell->getParam(ID(A_WIDTH)).as_int(); + int b_width = cell->getParam(ID(B_WIDTH)).as_int(); - bool is_signed = cell->getParam("\\A_SIGNED").as_bool(); + bool is_signed = cell->getParam(ID(A_SIGNED)).as_bool(); int width = is_signed ? std::min(a_width, b_width) : std::max(a_width, b_width); - SigSpec sig_a = cell->getPort("\\A"); - SigSpec sig_b = cell->getPort("\\B"); + SigSpec sig_a = cell->getPort(ID::A); + SigSpec sig_b = cell->getPort(ID::B); int redundant_bits = 0; @@ -1299,10 +1479,10 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (contradiction_cache.find(State::S0) == contradiction_cache.find(State::S1)) { - SigSpec y_sig = cell->getPort("\\Y"); - Const y_value(cell->type.in("$eq", "$eqx") ? 0 : 1, GetSize(y_sig)); + SigSpec y_sig = cell->getPort(ID::Y); + Const y_value(cell->type.in(ID($eq), ID($eqx)) ? 0 : 1, GetSize(y_sig)); - log("Replacing cell `%s' in module `%s' with constant driver %s.\n", + log_debug("Replacing cell `%s' in module `%s' with constant driver %s.\n", log_id(cell), log_id(module), log_signal(y_value)); module->connect(y_sig, y_value); @@ -1314,131 +1494,152 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons if (redundant_bits) { - log("Removed %d redundant input bits from %s cell `%s' in module `%s'.\n", + log_debug("Removed %d redundant input bits from %s cell `%s' in module `%s'.\n", redundant_bits, log_id(cell->type), log_id(cell), log_id(module)); - cell->setPort("\\A", sig_a); - cell->setPort("\\B", sig_b); - cell->setParam("\\A_WIDTH", GetSize(sig_a)); - cell->setParam("\\B_WIDTH", GetSize(sig_b)); + cell->setPort(ID::A, sig_a); + cell->setPort(ID::B, sig_b); + cell->setParam(ID(A_WIDTH), GetSize(sig_a)); + cell->setParam(ID(B_WIDTH), GetSize(sig_b)); did_something = true; goto next_cell; } } - // replace a<0 or a>=0 with the top bit of a - if (do_fine && (cell->type == "$lt" || cell->type == "$ge" || cell->type == "$gt" || cell->type == "$le")) + // simplify comparisons + if (do_fine && cell->type.in(ID($lt), ID($ge), ID($gt), ID($le))) { - //used to decide whether the signal needs to be negated - bool is_lt = false; - - //references the variable signal in the comparison - RTLIL::SigSpec sigVar; - - //references the constant signal in the comparison - RTLIL::SigSpec sigConst; - - // note that this signal must be constant for the optimization - // to take place, but it is not checked beforehand. - // If new passes are added, this signal must be checked for const-ness - - //width of the variable port - int width; - int const_width; - - bool var_signed; - - if (cell->type == "$lt" || cell->type == "$ge") { - is_lt = cell->type == "$lt" ? 1 : 0; - sigVar = cell->getPort("\\A"); - sigConst = cell->getPort("\\B"); - width = cell->parameters["\\A_WIDTH"].as_int(); - const_width = cell->parameters["\\B_WIDTH"].as_int(); - var_signed = cell->parameters["\\A_SIGNED"].as_bool(); - } else - if (cell->type == "$gt" || cell->type == "$le") { - is_lt = cell->type == "$gt" ? 1 : 0; - sigVar = cell->getPort("\\B"); - sigConst = cell->getPort("\\A"); - width = cell->parameters["\\B_WIDTH"].as_int(); - const_width = cell->parameters["\\A_WIDTH"].as_int(); - var_signed = cell->parameters["\\B_SIGNED"].as_bool(); - } else - log_abort(); - - // replace a(signed) < 0 with the high bit of a - if (sigConst.is_fully_const() && sigConst.is_fully_zero() && var_signed == true) + IdString cmp_type = cell->type; + SigSpec var_sig = cell->getPort(ID::A); + SigSpec const_sig = cell->getPort(ID::B); + int var_width = cell->parameters[ID(A_WIDTH)].as_int(); + int const_width = cell->parameters[ID(B_WIDTH)].as_int(); + bool is_signed = cell->getParam(ID(A_SIGNED)).as_bool(); + + if (!const_sig.is_fully_const()) { - RTLIL::SigSpec a_prime(RTLIL::State::S0, cell->parameters["\\Y_WIDTH"].as_int()); - a_prime[0] = sigVar[width - 1]; - if (is_lt) { - log("Replacing %s cell `%s' (implementing X<0) with X[%d]: %s\n", - log_id(cell->type), log_id(cell), width-1, log_signal(a_prime)); - module->connect(cell->getPort("\\Y"), a_prime); - module->remove(cell); - } else { - log("Replacing %s cell `%s' (implementing X>=0) with ~X[%d]: %s\n", - log_id(cell->type), log_id(cell), width-1, log_signal(a_prime)); - module->addNot(NEW_ID, a_prime, cell->getPort("\\Y")); - module->remove(cell); - } - did_something = true; - goto next_cell; - } else - if (sigConst.is_fully_const() && sigConst.is_fully_def() && var_signed == false) + std::swap(var_sig, const_sig); + std::swap(var_width, const_width); + if (cmp_type == ID($gt)) + cmp_type = ID($lt); + else if (cmp_type == ID($lt)) + cmp_type = ID($gt); + else if (cmp_type == ID($ge)) + cmp_type = ID($le); + else if (cmp_type == ID($le)) + cmp_type = ID($ge); + } + + if (const_sig.is_fully_def() && const_sig.is_fully_const()) { - if (sigConst.is_fully_zero()) { - RTLIL::SigSpec a_prime(RTLIL::State::S0, 1); - if (is_lt) { - log("Replacing %s cell `%s' (implementing unsigned X<0) with constant false.\n", - log_id(cell->type), log_id(cell)); - a_prime[0] = RTLIL::State::S0; - } else { - log("Replacing %s cell `%s' (implementing unsigned X>=0) with constant true.\n", - log_id(cell->type), log_id(cell)); - a_prime[0] = RTLIL::State::S1; + std::string condition, replacement; + SigSpec replace_sig(State::S0, GetSize(cell->getPort(ID::Y))); + bool replace = false; + bool remove = false; + + if (!is_signed) + { /* unsigned */ + if (const_sig.is_fully_zero() && cmp_type == ID($lt)) { + condition = "unsigned X<0"; + replacement = "constant 0"; + replace_sig[0] = State::S0; + replace = true; + } + if (const_sig.is_fully_zero() && cmp_type == ID($ge)) { + condition = "unsigned X>=0"; + replacement = "constant 1"; + replace_sig[0] = State::S1; + replace = true; + } + if (const_width == var_width && const_sig.is_fully_ones() && cmp_type == ID($gt)) { + condition = "unsigned X>~0"; + replacement = "constant 0"; + replace_sig[0] = State::S0; + replace = true; + } + if (const_width == var_width && const_sig.is_fully_ones() && cmp_type == ID($le)) { + condition = "unsigned X<=~0"; + replacement = "constant 1"; + replace_sig[0] = State::S1; + replace = true; } - module->connect(cell->getPort("\\Y"), a_prime); - module->remove(cell); - did_something = true; - goto next_cell; - } - int const_bit_set = get_onehot_bit_index(sigConst); - if (const_bit_set >= 0 && const_bit_set < width) { - int bit_set = const_bit_set; - RTLIL::SigSpec a_prime(RTLIL::State::S0, width - bit_set); - for (int i = bit_set; i < width; i++) { - a_prime[i - bit_set] = sigVar[i]; + int const_bit_hot = get_onehot_bit_index(const_sig); + if (const_bit_hot >= 0 && const_bit_hot < var_width) + { + RTLIL::SigSpec var_high_sig(RTLIL::State::S0, var_width - const_bit_hot); + for (int i = const_bit_hot; i < var_width; i++) { + var_high_sig[i - const_bit_hot] = var_sig[i]; + } + + if (cmp_type == ID($lt)) + { + condition = stringf("unsigned X<%s", log_signal(const_sig)); + replacement = stringf("!X[%d:%d]", var_width - 1, const_bit_hot); + module->addLogicNot(NEW_ID, var_high_sig, cell->getPort(ID::Y)); + remove = true; + } + if (cmp_type == ID($ge)) + { + condition = stringf("unsigned X>=%s", log_signal(const_sig)); + replacement = stringf("|X[%d:%d]", var_width - 1, const_bit_hot); + module->addReduceOr(NEW_ID, var_high_sig, cell->getPort(ID::Y)); + remove = true; + } } - if (is_lt) { - log("Replacing %s cell `%s' (implementing unsigned X<%s) with !X[%d:%d]: %s.\n", - log_id(cell->type), log_id(cell), log_signal(sigConst), width - 1, bit_set, log_signal(a_prime)); - module->addLogicNot(NEW_ID, a_prime, cell->getPort("\\Y")); - } else { - log("Replacing %s cell `%s' (implementing unsigned X>=%s) with |X[%d:%d]: %s.\n", - log_id(cell->type), log_id(cell), log_signal(sigConst), width - 1, bit_set, log_signal(a_prime)); - module->addReduceOr(NEW_ID, a_prime, cell->getPort("\\Y")); + + int const_bit_set = get_highest_hot_index(const_sig); + if(const_bit_set >= var_width) + { + string cmp_name; + if (cmp_type == ID($lt) || cmp_type == ID($le)) + { + if (cmp_type == ID($lt)) cmp_name = "<"; + if (cmp_type == ID($le)) cmp_name = "<="; + condition = stringf("unsigned X[%d:0]%s%s", var_width - 1, cmp_name.c_str(), log_signal(const_sig)); + replacement = "constant 1"; + replace_sig[0] = State::S1; + replace = true; + } + if (cmp_type == ID($gt) || cmp_type == ID($ge)) + { + if (cmp_type == ID($gt)) cmp_name = ">"; + if (cmp_type == ID($ge)) cmp_name = ">="; + condition = stringf("unsigned X[%d:0]%s%s", var_width - 1, cmp_name.c_str(), log_signal(const_sig)); + replacement = "constant 0"; + replace_sig[0] = State::S0; + replace = true; + } } - module->remove(cell); - did_something = true; - goto next_cell; } - else if(const_bit_set >= width && const_bit_set >= 0){ - RTLIL::SigSpec a_prime(RTLIL::State::S0, 1); - if(is_lt){ - a_prime[0] = RTLIL::State::S1; - log("Replacing %s cell `%s' (implementing unsigned X[%d:0] < %s[%d:0]) with constant 0.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1); + else + { /* signed */ + if (const_sig.is_fully_zero() && cmp_type == ID($lt)) + { + condition = "signed X<0"; + replacement = stringf("X[%d]", var_width - 1); + replace_sig[0] = var_sig[var_width - 1]; + replace = true; } - else{ - log("Replacing %s cell `%s' (implementing unsigned X[%d:0]>= %s[%d:0]) with constant 1.\n", log_id(cell->type), log_id(cell), width-1, log_signal(sigConst),const_width-1); + if (const_sig.is_fully_zero() && cmp_type == ID($ge)) + { + condition = "signed X>=0"; + replacement = stringf("X[%d]", var_width - 1); + module->addNot(NEW_ID, var_sig[var_width - 1], cell->getPort(ID::Y)); + remove = true; } - module->connect(cell->getPort("\\Y"), a_prime); + } + + if (replace || remove) + { + log_debug("Replacing %s cell `%s' (implementing %s) with %s.\n", + log_id(cell->type), log_id(cell), condition.c_str(), replacement.c_str()); + if (replace) + module->connect(cell->getPort(ID::Y), replace_sig); module->remove(cell); did_something = true; goto next_cell; - } } } @@ -1453,14 +1654,14 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons struct OptExprPass : public Pass { OptExprPass() : Pass("opt_expr", "perform const folding and simple expression rewriting") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); log(" opt_expr [options] [selection]\n"); log("\n"); log("This pass performs const folding on internal cell types with constant inputs.\n"); - log("It also performs some simple expression rewritring.\n"); + log("It also performs some simple expression rewriting.\n"); log("\n"); log(" -mux_undef\n"); log(" remove 'undef' inputs from $mux, $pmux and $_MUX_ cells\n"); @@ -1487,7 +1688,7 @@ struct OptExprPass : public Pass { log(" replaced by 'a'. the -keepdc option disables all such optimizations.\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { bool mux_undef = false; bool mux_bool = false; @@ -1538,8 +1739,14 @@ struct OptExprPass : public Pass { for (auto module : design->selected_modules()) { - if (undriven) + log("Optimizing module %s.\n", log_id(module)); + + if (undriven) { + did_something = false; replace_undriven(design, module); + if (did_something) + design->scratchpad_set_bool("opt.did_something", true); + } do { do { @@ -1549,7 +1756,11 @@ struct OptExprPass : public Pass { design->scratchpad_set_bool("opt.did_something", true); } while (did_something); replace_const_cells(design, module, true, mux_undef, mux_bool, do_fine, keepdc, clkinv); + if (did_something) + design->scratchpad_set_bool("opt.did_something", true); } while (did_something); + + log_suppressed(); } log_pop(); diff --git a/passes/opt/opt_lut.cc b/passes/opt/opt_lut.cc new file mode 100644 index 000000000..c4f278706 --- /dev/null +++ b/passes/opt/opt_lut.cc @@ -0,0 +1,595 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2018 whitequark <whitequark@whitequark.org> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/yosys.h" +#include "kernel/sigtools.h" +#include "kernel/modtools.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +struct OptLutWorker +{ + dict<IdString, dict<int, IdString>> &dlogic; + RTLIL::Module *module; + ModIndex index; + SigMap sigmap; + + pool<RTLIL::Cell*> luts; + dict<RTLIL::Cell*, int> luts_arity; + dict<RTLIL::Cell*, pool<RTLIL::Cell*>> luts_dlogics; + dict<RTLIL::Cell*, pool<int>> luts_dlogic_inputs; + + int eliminated_count = 0, combined_count = 0; + + bool evaluate_lut(RTLIL::Cell *lut, dict<SigBit, bool> inputs) + { + SigSpec lut_input = sigmap(lut->getPort(ID::A)); + int lut_width = lut->getParam(ID(WIDTH)).as_int(); + Const lut_table = lut->getParam(ID(LUT)); + int lut_index = 0; + + for (int i = 0; i < lut_width; i++) + { + SigBit input = sigmap(lut_input[i]); + if (inputs.count(input)) + { + lut_index |= inputs[input] << i; + } + else + { + lut_index |= SigSpec(lut_input[i]).as_bool() << i; + } + } + + return lut_table.extract(lut_index).as_bool(); + } + + void show_stats_by_arity() + { + dict<int, int> arity_counts; + dict<IdString, int> dlogic_counts; + int max_arity = 0; + + for (auto lut_arity : luts_arity) + { + max_arity = max(max_arity, lut_arity.second); + arity_counts[lut_arity.second]++; + } + + for (auto &lut_dlogics : luts_dlogics) + { + for (auto &lut_dlogic : lut_dlogics.second) + { + dlogic_counts[lut_dlogic->type]++; + } + } + + log("Number of LUTs: %8d\n", GetSize(luts)); + for (int arity = 1; arity <= max_arity; arity++) + { + if (arity_counts[arity]) + log(" %d-LUT %16d\n", arity, arity_counts[arity]); + } + for (auto &dlogic_count : dlogic_counts) + { + log(" with %-12s %4d\n", dlogic_count.first.c_str(), dlogic_count.second); + } + } + + OptLutWorker(dict<IdString, dict<int, IdString>> &dlogic, RTLIL::Module *module, int limit) : + dlogic(dlogic), module(module), index(module), sigmap(module) + { + log("Discovering LUTs.\n"); + for (auto cell : module->selected_cells()) + { + if (cell->type == ID($lut)) + { + if (cell->has_keep_attr()) + continue; + SigBit lut_output = cell->getPort(ID::Y); + if (lut_output.wire->get_bool_attribute(ID::keep)) + continue; + + int lut_width = cell->getParam(ID(WIDTH)).as_int(); + SigSpec lut_input = cell->getPort(ID::A); + int lut_arity = 0; + + log_debug("Found $lut\\WIDTH=%d cell %s.%s.\n", lut_width, log_id(module), log_id(cell)); + luts.insert(cell); + + // First, find all dedicated logic we're connected to. This results in an overapproximation + // of such connections. + pool<RTLIL::Cell*> lut_all_dlogics; + for (int i = 0; i < lut_width; i++) + { + SigBit bit = lut_input[i]; + for (auto &port : index.query_ports(bit)) + { + if (dlogic.count(port.cell->type)) + { + auto &dlogic_map = dlogic[port.cell->type]; + if (dlogic_map.count(i)) + { + if (port.port == dlogic_map[i]) + { + lut_all_dlogics.insert(port.cell); + } + } + } + } + } + + // Second, make sure that the connection to dedicated logic is legal. If it is not legal, + // it means one of the two things: + // * The connection is spurious. I.e. this is dedicated logic that will be packed + // with some other LUT, and it just happens to be connected to this LUT as well. + // * The connection is illegal. + // In either of these cases, we don't need to concern ourselves with preserving the connection + // between this LUT and this dedicated logic cell. + pool<RTLIL::Cell*> lut_legal_dlogics; + pool<int> lut_dlogic_inputs; + for (auto lut_dlogic : lut_all_dlogics) + { + auto &dlogic_map = dlogic[lut_dlogic->type]; + bool legal = true; + for (auto &dlogic_conn : dlogic_map) + { + if (lut_width <= dlogic_conn.first) + { + log_debug(" LUT has illegal connection to %s cell %s.%s.\n", lut_dlogic->type.c_str(), log_id(module), log_id(lut_dlogic)); + log_debug(" LUT input A[%d] not present.\n", dlogic_conn.first); + legal = false; + break; + } + if (sigmap(lut_input[dlogic_conn.first]) != sigmap(lut_dlogic->getPort(dlogic_conn.second))) + { + log_debug(" LUT has illegal connection to %s cell %s.%s.\n", lut_dlogic->type.c_str(), log_id(module), log_id(lut_dlogic)); + log_debug(" LUT input A[%d] (wire %s) not connected to %s port %s (wire %s).\n", dlogic_conn.first, log_signal(lut_input[dlogic_conn.first]), lut_dlogic->type.c_str(), dlogic_conn.second.c_str(), log_signal(lut_dlogic->getPort(dlogic_conn.second))); + legal = false; + break; + } + } + + if (legal) + { + log_debug(" LUT has legal connection to %s cell %s.%s.\n", lut_dlogic->type.c_str(), log_id(module), log_id(lut_dlogic)); + lut_legal_dlogics.insert(lut_dlogic); + for (auto &dlogic_conn : dlogic_map) + lut_dlogic_inputs.insert(dlogic_conn.first); + } + } + + // Third, determine LUT arity. An n-wide LUT that has k constant inputs and m inputs shared with dedicated + // logic implements an (n-k-m)-ary function. + for (int i = 0; i < lut_width; i++) + { + SigBit bit = lut_input[i]; + if (bit.wire || lut_dlogic_inputs.count(i)) + lut_arity++; + } + + log_debug(" Cell implements a %d-LUT.\n", lut_arity); + luts_arity[cell] = lut_arity; + luts_dlogics[cell] = lut_legal_dlogics; + luts_dlogic_inputs[cell] = lut_dlogic_inputs; + } + } + show_stats_by_arity(); + + log("\n"); + log("Eliminating LUTs.\n"); + pool<RTLIL::Cell*> worklist = luts; + while (worklist.size()) + { + if (limit == 0) + { + log("Limit reached.\n"); + break; + } + + auto lut = worklist.pop(); + SigSpec lut_input = sigmap(lut->getPort(ID::A)); + pool<int> &lut_dlogic_inputs = luts_dlogic_inputs[lut]; + + vector<SigBit> lut_inputs; + for (auto &bit : lut_input) + { + if (bit.wire) + lut_inputs.push_back(sigmap(bit)); + } + + bool const0_match = true; + bool const1_match = true; + vector<bool> input_matches; + for (size_t i = 0; i < lut_inputs.size(); i++) + input_matches.push_back(true); + + for (int eval = 0; eval < 1 << lut_inputs.size(); eval++) + { + dict<SigBit, bool> eval_inputs; + for (size_t i = 0; i < lut_inputs.size(); i++) + eval_inputs[lut_inputs[i]] = (eval >> i) & 1; + bool value = evaluate_lut(lut, eval_inputs); + if (value != 0) + const0_match = false; + if (value != 1) + const1_match = false; + for (size_t i = 0; i < lut_inputs.size(); i++) + { + if (value != eval_inputs[lut_inputs[i]]) + input_matches[i] = false; + } + } + + int input_match = -1; + for (size_t i = 0; i < lut_inputs.size(); i++) + if (input_matches[i]) + input_match = i; + + if (const0_match || const1_match || input_match != -1) + { + log_debug("Found redundant cell %s.%s.\n", log_id(module), log_id(lut)); + + SigBit value; + if (const0_match) + { + log_debug(" Cell evaluates constant 0.\n"); + value = State::S0; + } + if (const1_match) + { + log_debug(" Cell evaluates constant 1.\n"); + value = State::S1; + } + if (input_match != -1) { + log_debug(" Cell evaluates signal %s.\n", log_signal(lut_inputs[input_match])); + value = lut_inputs[input_match]; + } + + if (lut_dlogic_inputs.size()) + log_debug(" Not eliminating cell (connected to dedicated logic).\n"); + else + { + SigSpec lut_output = lut->getPort(ID::Y); + for (auto &port : index.query_ports(lut_output)) + { + if (port.cell != lut && luts.count(port.cell)) + worklist.insert(port.cell); + } + + module->connect(lut_output, value); + sigmap.add(lut_output, value); + + module->remove(lut); + luts.erase(lut); + luts_arity.erase(lut); + luts_dlogics.erase(lut); + luts_dlogic_inputs.erase(lut); + + eliminated_count++; + if (limit > 0) + limit--; + } + } + } + show_stats_by_arity(); + + log("\n"); + log("Combining LUTs.\n"); + worklist = luts; + while (worklist.size()) + { + if (limit == 0) + { + log("Limit reached.\n"); + break; + } + + auto lutA = worklist.pop(); + SigSpec lutA_input = sigmap(lutA->getPort(ID::A)); + SigSpec lutA_output = sigmap(lutA->getPort(ID::Y)[0]); + int lutA_width = lutA->getParam(ID(WIDTH)).as_int(); + int lutA_arity = luts_arity[lutA]; + pool<int> &lutA_dlogic_inputs = luts_dlogic_inputs[lutA]; + + auto lutA_output_ports = index.query_ports(lutA->getPort(ID::Y)); + if (lutA_output_ports.size() != 2) + continue; + + for (auto &port : lutA_output_ports) + { + if (port.cell == lutA) + continue; + + if (luts.count(port.cell)) + { + auto lutB = port.cell; + SigSpec lutB_input = sigmap(lutB->getPort(ID::A)); + SigSpec lutB_output = sigmap(lutB->getPort(ID::Y)[0]); + int lutB_width = lutB->getParam(ID(WIDTH)).as_int(); + int lutB_arity = luts_arity[lutB]; + pool<int> &lutB_dlogic_inputs = luts_dlogic_inputs[lutB]; + + log_debug("Found %s.%s (cell A) feeding %s.%s (cell B).\n", log_id(module), log_id(lutA), log_id(module), log_id(lutB)); + + if (index.query_is_output(lutA->getPort(ID::Y))) + { + log_debug(" Not combining LUTs (cascade connection feeds module output).\n"); + continue; + } + + pool<SigBit> lutA_inputs; + pool<SigBit> lutB_inputs; + for (auto &bit : lutA_input) + { + if (bit.wire) + lutA_inputs.insert(sigmap(bit)); + } + for (auto &bit : lutB_input) + { + if (bit.wire) + lutB_inputs.insert(sigmap(bit)); + } + + pool<SigBit> common_inputs; + for (auto &bit : lutA_inputs) + { + if (lutB_inputs.count(bit)) + common_inputs.insert(bit); + } + + int lutM_arity = lutA_arity + lutB_arity - 1 - common_inputs.size(); + if (lutA_dlogic_inputs.size()) + log_debug(" Cell A is a %d-LUT with %d dedicated connections. ", lutA_arity, GetSize(lutA_dlogic_inputs)); + else + log_debug(" Cell A is a %d-LUT. ", lutA_arity); + if (lutB_dlogic_inputs.size()) + log_debug("Cell B is a %d-LUT with %d dedicated connections.\n", lutB_arity, GetSize(lutB_dlogic_inputs)); + else + log_debug("Cell B is a %d-LUT.\n", lutB_arity); + log_debug(" Cells share %d input(s) and can be merged into one %d-LUT.\n", GetSize(common_inputs), lutM_arity); + + const int COMBINE_A = 1, COMBINE_B = 2, COMBINE_EITHER = COMBINE_A | COMBINE_B; + int combine_mask = 0; + if (lutM_arity > lutA_width) + log_debug(" Not combining LUTs into cell A (combined LUT wider than cell A).\n"); + else if (lutB_dlogic_inputs.size() > 0) + log_debug(" Not combining LUTs into cell A (cell B is connected to dedicated logic).\n"); + else if (lutB->get_bool_attribute(ID(lut_keep))) + log_debug(" Not combining LUTs into cell A (cell B has attribute \\lut_keep).\n"); + else + combine_mask |= COMBINE_A; + if (lutM_arity > lutB_width) + log_debug(" Not combining LUTs into cell B (combined LUT wider than cell B).\n"); + else if (lutA_dlogic_inputs.size() > 0) + log_debug(" Not combining LUTs into cell B (cell A is connected to dedicated logic).\n"); + else if (lutA->get_bool_attribute(ID(lut_keep))) + log_debug(" Not combining LUTs into cell B (cell A has attribute \\lut_keep).\n"); + else + combine_mask |= COMBINE_B; + + int combine = combine_mask; + if (combine == COMBINE_EITHER) + { + log_debug(" Can combine into either cell.\n"); + if (lutA_arity == 1) + { + log_debug(" Cell A is a buffer or inverter, combining into cell B.\n"); + combine = COMBINE_B; + } + else if (lutB_arity == 1) + { + log_debug(" Cell B is a buffer or inverter, combining into cell A.\n"); + combine = COMBINE_A; + } + else + { + log_debug(" Arbitrarily combining into cell A.\n"); + combine = COMBINE_A; + } + } + + RTLIL::Cell *lutM, *lutR; + pool<SigBit> lutM_inputs, lutR_inputs; + pool<int> lutM_dlogic_inputs; + if (combine == COMBINE_A) + { + log_debug(" Combining LUTs into cell A.\n"); + lutM = lutA; + lutM_inputs = lutA_inputs; + lutM_dlogic_inputs = lutA_dlogic_inputs; + lutR = lutB; + lutR_inputs = lutB_inputs; + } + else if (combine == COMBINE_B) + { + log_debug(" Combining LUTs into cell B.\n"); + lutM = lutB; + lutM_inputs = lutB_inputs; + lutM_dlogic_inputs = lutB_dlogic_inputs; + lutR = lutA; + lutR_inputs = lutA_inputs; + } + else + { + log_debug(" Cannot combine LUTs.\n"); + continue; + } + + pool<SigBit> lutR_unique; + for (auto &bit : lutR_inputs) + { + if (!common_inputs.count(bit) && bit != lutA_output) + lutR_unique.insert(bit); + } + + int lutM_width = lutM->getParam(ID(WIDTH)).as_int(); + SigSpec lutM_input = sigmap(lutM->getPort(ID::A)); + std::vector<SigBit> lutM_new_inputs; + for (int i = 0; i < lutM_width; i++) + { + bool input_unused = false; + if (sigmap(lutM_input[i]) == lutA_output) + input_unused = true; + if (!lutM_input[i].wire && !lutM_dlogic_inputs.count(i)) + input_unused = true; + + if (input_unused && lutR_unique.size()) + { + SigBit new_input = lutR_unique.pop(); + log_debug(" Connecting input %d as %s.\n", i, log_signal(new_input)); + lutM_new_inputs.push_back(new_input); + } + else if (sigmap(lutM_input[i]) == lutA_output) + { + log_debug(" Disconnecting cascade input %d.\n", i); + lutM_new_inputs.push_back(SigBit()); + } + else + { + log_debug(" Leaving input %d as %s.\n", i, log_signal(lutM_input[i])); + lutM_new_inputs.push_back(lutM_input[i]); + } + } + log_assert(lutR_unique.size() == 0); + + RTLIL::Const lutM_new_table(State::Sx, 1 << lutM_width); + for (int eval = 0; eval < 1 << lutM_width; eval++) + { + dict<SigBit, bool> eval_inputs; + for (size_t i = 0; i < lutM_new_inputs.size(); i++) + { + eval_inputs[lutM_new_inputs[i]] = (eval >> i) & 1; + } + eval_inputs[lutA_output] = evaluate_lut(lutA, eval_inputs); + lutM_new_table[eval] = (RTLIL::State) evaluate_lut(lutB, eval_inputs); + } + + log_debug(" Cell A truth table: %s.\n", lutA->getParam(ID(LUT)).as_string().c_str()); + log_debug(" Cell B truth table: %s.\n", lutB->getParam(ID(LUT)).as_string().c_str()); + log_debug(" Merged truth table: %s.\n", lutM_new_table.as_string().c_str()); + + lutM->setParam(ID(LUT), lutM_new_table); + lutM->setPort(ID::A, lutM_new_inputs); + lutM->setPort(ID::Y, lutB_output); + + luts_arity[lutM] = lutM_arity; + luts.erase(lutR); + luts_arity.erase(lutR); + lutR->module->remove(lutR); + + worklist.insert(lutM); + worklist.erase(lutR); + + combined_count++; + if (limit > 0) + limit--; + } + } + } + show_stats_by_arity(); + } +}; + +static void split(std::vector<std::string> &tokens, const std::string &text, char sep) +{ + size_t start = 0, end = 0; + while ((end = text.find(sep, start)) != std::string::npos) { + tokens.push_back(text.substr(start, end - start)); + start = end + 1; + } + tokens.push_back(text.substr(start)); +} + +struct OptLutPass : public Pass { + OptLutPass() : Pass("opt_lut", "optimize LUT cells") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" opt_lut [options] [selection]\n"); + log("\n"); + log("This pass combines cascaded $lut cells with unused inputs.\n"); + log("\n"); + log(" -dlogic <type>:<cell-port>=<LUT-input>[:<cell-port>=<LUT-input>...]\n"); + log(" preserve connections to dedicated logic cell <type> that has ports\n"); + log(" <cell-port> connected to LUT inputs <LUT-input>. this includes\n"); + log(" the case where both LUT and dedicated logic input are connected to\n"); + log(" the same constant.\n"); + log("\n"); + log(" -limit N\n"); + log(" only perform the first N combines, then stop. useful for debugging.\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + log_header(design, "Executing OPT_LUT pass (optimize LUTs).\n"); + + dict<IdString, dict<int, IdString>> dlogic; + int limit = -1; + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) + { + if (args[argidx] == "-dlogic" && argidx+1 < args.size()) + { + std::vector<std::string> tokens; + split(tokens, args[++argidx], ':'); + if (tokens.size() < 2) + log_cmd_error("The -dlogic option requires at least one connection.\n"); + IdString type = "\\" + tokens[0]; + for (auto it = tokens.begin() + 1; it != tokens.end(); ++it) { + std::vector<std::string> conn_tokens; + split(conn_tokens, *it, '='); + if (conn_tokens.size() != 2) + log_cmd_error("Invalid format of -dlogic signal mapping.\n"); + IdString logic_port = "\\" + conn_tokens[0]; + int lut_input = atoi(conn_tokens[1].c_str()); + dlogic[type][lut_input] = logic_port; + } + continue; + } + if (args[argidx] == "-limit" && argidx + 1 < args.size()) + { + limit = atoi(args[++argidx].c_str()); + continue; + } + break; + } + extra_args(args, argidx, design); + + int eliminated_count = 0, combined_count = 0; + for (auto module : design->selected_modules()) + { + OptLutWorker worker(dlogic, module, limit - eliminated_count - combined_count); + eliminated_count += worker.eliminated_count; + combined_count += worker.combined_count; + } + if (eliminated_count) + design->scratchpad_set_bool("opt.did_something", true); + if (combined_count) + design->scratchpad_set_bool("opt.did_something", true); + log("\n"); + log("Eliminated %d LUTs.\n", eliminated_count); + log("Combined %d LUTs.\n", combined_count); + } +} OptLutPass; + +PRIVATE_NAMESPACE_END diff --git a/passes/opt/opt_mem.cc b/passes/opt/opt_mem.cc new file mode 100644 index 000000000..98d3551eb --- /dev/null +++ b/passes/opt/opt_mem.cc @@ -0,0 +1,143 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/yosys.h" +#include "kernel/sigtools.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +struct OptMemWorker +{ + RTLIL::Design *design; + RTLIL::Module *module; + SigMap sigmap; + bool restart; + + dict<IdString, vector<IdString>> memrd, memwr, meminit; + pool<IdString> remove_mem, remove_cells; + + OptMemWorker(RTLIL::Module *module) : design(module->design), module(module), sigmap(module), restart(false) + { + for (auto &it : module->memories) + { + memrd[it.first]; + memwr[it.first]; + meminit[it.first]; + } + + for (auto cell : module->cells()) + { + if (cell->type == ID($memrd)) { + IdString id = cell->getParam(ID(MEMID)).decode_string(); + memrd.at(id).push_back(cell->name); + } + + if (cell->type == ID($memwr)) { + IdString id = cell->getParam(ID(MEMID)).decode_string(); + memwr.at(id).push_back(cell->name); + } + + if (cell->type == ID($meminit)) { + IdString id = cell->getParam(ID(MEMID)).decode_string(); + meminit.at(id).push_back(cell->name); + } + } + } + + ~OptMemWorker() + { + for (auto it : remove_mem) + { + for (auto cell_name : memrd[it]) + module->remove(module->cell(cell_name)); + for (auto cell_name : memwr[it]) + module->remove(module->cell(cell_name)); + for (auto cell_name : meminit[it]) + module->remove(module->cell(cell_name)); + + delete module->memories.at(it); + module->memories.erase(it); + } + + for (auto cell_name : remove_cells) + module->remove(module->cell(cell_name)); + } + + int run(RTLIL::Memory *mem) + { + if (restart || remove_mem.count(mem->name)) + return 0; + + if (memwr.at(mem->name).empty() && meminit.at(mem->name).empty()) { + log("Removing memory %s.%s with no write ports or init data.\n", log_id(module), log_id(mem)); + remove_mem.insert(mem->name); + return 1; + } + + return 0; + } +}; + +struct OptMemPass : public Pass { + OptMemPass() : Pass("opt_mem", "optimize memories") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" opt_mem [options] [selection]\n"); + log("\n"); + log("This pass performs various optimizations on memories in the design.\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + log_header(design, "Executing OPT_MEM pass (optimize memories).\n"); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) { + // if (args[argidx] == "-nomux") { + // mode_nomux = true; + // continue; + // } + break; + } + extra_args(args, argidx, design); + + int total_count = 0; + for (auto module : design->selected_modules()) { + while (1) { + int cnt = 0; + OptMemWorker worker(module); + for (auto &it : module->memories) + if (module->selected(it.second)) + cnt += worker.run(it.second); + if (!cnt && !worker.restart) + break; + total_count += cnt; + } + } + + if (total_count) + design->scratchpad_set_bool("opt.did_something", true); + log("Performed a total of %d transformations.\n", total_count); + } +} OptMemPass; + +PRIVATE_NAMESPACE_END diff --git a/passes/opt/opt_merge.cc b/passes/opt/opt_merge.cc index 93d9f012f..aaea6159e 100644 --- a/passes/opt/opt_merge.cc +++ b/passes/opt/opt_merge.cc @@ -47,8 +47,8 @@ struct OptMergeWorker static void sort_pmux_conn(dict<RTLIL::IdString, RTLIL::SigSpec> &conn) { - SigSpec sig_s = conn.at("\\S"); - SigSpec sig_b = conn.at("\\B"); + SigSpec sig_s = conn.at(ID(S)); + SigSpec sig_b = conn.at(ID::B); int s_width = GetSize(sig_s); int width = GetSize(sig_b) / s_width; @@ -59,12 +59,12 @@ struct OptMergeWorker std::sort(sb_pairs.begin(), sb_pairs.end()); - conn["\\S"] = SigSpec(); - conn["\\B"] = SigSpec(); + conn[ID(S)] = SigSpec(); + conn[ID::B] = SigSpec(); for (auto &it : sb_pairs) { - conn["\\S"].append(it.first); - conn["\\B"].append(it.second); + conn[ID(S)].append(it.first); + conn[ID::B].append(it.second); } } @@ -94,32 +94,32 @@ struct OptMergeWorker const dict<RTLIL::IdString, RTLIL::SigSpec> *conn = &cell->connections(); dict<RTLIL::IdString, RTLIL::SigSpec> alt_conn; - if (cell->type == "$and" || cell->type == "$or" || cell->type == "$xor" || cell->type == "$xnor" || cell->type == "$add" || cell->type == "$mul" || - cell->type == "$logic_and" || cell->type == "$logic_or" || cell->type == "$_AND_" || cell->type == "$_OR_" || cell->type == "$_XOR_") { + if (cell->type.in(ID($and), ID($or), ID($xor), ID($xnor), ID($add), ID($mul), + ID($logic_and), ID($logic_or), ID($_AND_), ID($_OR_), ID($_XOR_))) { alt_conn = *conn; - if (assign_map(alt_conn.at("\\A")) < assign_map(alt_conn.at("\\B"))) { - alt_conn["\\A"] = conn->at("\\B"); - alt_conn["\\B"] = conn->at("\\A"); + if (assign_map(alt_conn.at(ID::A)) < assign_map(alt_conn.at(ID::B))) { + alt_conn[ID::A] = conn->at(ID::B); + alt_conn[ID::B] = conn->at(ID::A); } conn = &alt_conn; } else - if (cell->type == "$reduce_xor" || cell->type == "$reduce_xnor") { + if (cell->type.in(ID($reduce_xor), ID($reduce_xnor))) { alt_conn = *conn; - assign_map.apply(alt_conn.at("\\A")); - alt_conn.at("\\A").sort(); + assign_map.apply(alt_conn.at(ID::A)); + alt_conn.at(ID::A).sort(); conn = &alt_conn; } else - if (cell->type == "$reduce_and" || cell->type == "$reduce_or" || cell->type == "$reduce_bool") { + if (cell->type.in(ID($reduce_and), ID($reduce_or), ID($reduce_bool))) { alt_conn = *conn; - assign_map.apply(alt_conn.at("\\A")); - alt_conn.at("\\A").sort_and_unify(); + assign_map.apply(alt_conn.at(ID::A)); + alt_conn.at(ID::A).sort_and_unify(); conn = &alt_conn; } else - if (cell->type == "$pmux") { + if (cell->type == ID($pmux)) { alt_conn = *conn; - assign_map.apply(alt_conn.at("\\A")); - assign_map.apply(alt_conn.at("\\B")); - assign_map.apply(alt_conn.at("\\S")); + assign_map.apply(alt_conn.at(ID::A)); + assign_map.apply(alt_conn.at(ID::B)); + assign_map.apply(alt_conn.at(ID(S))); sort_pmux_conn(alt_conn); conn = &alt_conn; } @@ -189,28 +189,28 @@ struct OptMergeWorker assign_map.apply(it.second); } - if (cell1->type == "$and" || cell1->type == "$or" || cell1->type == "$xor" || cell1->type == "$xnor" || cell1->type == "$add" || cell1->type == "$mul" || - cell1->type == "$logic_and" || cell1->type == "$logic_or" || cell1->type == "$_AND_" || cell1->type == "$_OR_" || cell1->type == "$_XOR_") { - if (conn1.at("\\A") < conn1.at("\\B")) { - RTLIL::SigSpec tmp = conn1["\\A"]; - conn1["\\A"] = conn1["\\B"]; - conn1["\\B"] = tmp; + if (cell1->type == ID($and) || cell1->type == ID($or) || cell1->type == ID($xor) || cell1->type == ID($xnor) || cell1->type == ID($add) || cell1->type == ID($mul) || + cell1->type == ID($logic_and) || cell1->type == ID($logic_or) || cell1->type == ID($_AND_) || cell1->type == ID($_OR_) || cell1->type == ID($_XOR_)) { + if (conn1.at(ID::A) < conn1.at(ID::B)) { + RTLIL::SigSpec tmp = conn1[ID::A]; + conn1[ID::A] = conn1[ID::B]; + conn1[ID::B] = tmp; } - if (conn2.at("\\A") < conn2.at("\\B")) { - RTLIL::SigSpec tmp = conn2["\\A"]; - conn2["\\A"] = conn2["\\B"]; - conn2["\\B"] = tmp; + if (conn2.at(ID::A) < conn2.at(ID::B)) { + RTLIL::SigSpec tmp = conn2[ID::A]; + conn2[ID::A] = conn2[ID::B]; + conn2[ID::B] = tmp; } } else - if (cell1->type == "$reduce_xor" || cell1->type == "$reduce_xnor") { - conn1["\\A"].sort(); - conn2["\\A"].sort(); + if (cell1->type == ID($reduce_xor) || cell1->type == ID($reduce_xnor)) { + conn1[ID::A].sort(); + conn2[ID::A].sort(); } else - if (cell1->type == "$reduce_and" || cell1->type == "$reduce_or" || cell1->type == "$reduce_bool") { - conn1["\\A"].sort_and_unify(); - conn2["\\A"].sort_and_unify(); + if (cell1->type == ID($reduce_and) || cell1->type == ID($reduce_or) || cell1->type == ID($reduce_bool)) { + conn1[ID::A].sort_and_unify(); + conn2[ID::A].sort_and_unify(); } else - if (cell1->type == "$pmux") { + if (cell1->type == ID($pmux)) { sort_pmux_conn(conn1); sort_pmux_conn(conn2); } @@ -222,9 +222,9 @@ struct OptMergeWorker return true; } - if (cell1->type.substr(0, 1) == "$" && conn1.count("\\Q") != 0) { - std::vector<RTLIL::SigBit> q1 = dff_init_map(cell1->getPort("\\Q")).to_sigbit_vector(); - std::vector<RTLIL::SigBit> q2 = dff_init_map(cell2->getPort("\\Q")).to_sigbit_vector(); + if (cell1->type.begins_with("$") && conn1.count(ID(Q)) != 0) { + std::vector<RTLIL::SigBit> q1 = dff_init_map(cell1->getPort(ID(Q))).to_sigbit_vector(); + std::vector<RTLIL::SigBit> q2 = dff_init_map(cell2->getPort(ID(Q))).to_sigbit_vector(); for (size_t i = 0; i < q1.size(); i++) if ((q1.at(i).wire == NULL || q2.at(i).wire == NULL) && q1.at(i) != q2.at(i)) { lt = q1.at(i) < q2.at(i); @@ -271,22 +271,24 @@ struct OptMergeWorker ct.setup_stdcells_mem(); if (mode_nomux) { - ct.cell_types.erase("$mux"); - ct.cell_types.erase("$pmux"); + ct.cell_types.erase(ID($mux)); + ct.cell_types.erase(ID($pmux)); } - ct.cell_types.erase("$tribuf"); - ct.cell_types.erase("$_TBUF_"); - ct.cell_types.erase("$anyseq"); - ct.cell_types.erase("$anyconst"); + ct.cell_types.erase(ID($tribuf)); + ct.cell_types.erase(ID($_TBUF_)); + ct.cell_types.erase(ID($anyseq)); + ct.cell_types.erase(ID($anyconst)); + ct.cell_types.erase(ID($allseq)); + ct.cell_types.erase(ID($allconst)); log("Finding identical cells in module `%s'.\n", module->name.c_str()); assign_map.set(module); dff_init_map.set(module); for (auto &it : module->wires_) - if (it.second->attributes.count("\\init") != 0) { - Const initval = it.second->attributes.at("\\init"); + if (it.second->attributes.count(ID(init)) != 0) { + Const initval = it.second->attributes.at(ID(init)); for (int i = 0; i < GetSize(initval) && i < GetSize(it.second); i++) if (initval[i] == State::S0 || initval[i] == State::S1) dff_init_map.add(SigBit(it.second, i), initval[i]); @@ -313,17 +315,17 @@ struct OptMergeWorker { if (sharemap.count(cell) > 0) { did_something = true; - log(" Cell `%s' is identical to cell `%s'.\n", cell->name.c_str(), sharemap[cell]->name.c_str()); + log_debug(" Cell `%s' is identical to cell `%s'.\n", cell->name.c_str(), sharemap[cell]->name.c_str()); for (auto &it : cell->connections()) { if (cell->output(it.first)) { RTLIL::SigSpec other_sig = sharemap[cell]->getPort(it.first); - log(" Redirecting output %s: %s = %s\n", it.first.c_str(), + log_debug(" Redirecting output %s: %s = %s\n", it.first.c_str(), log_signal(it.second), log_signal(other_sig)); module->connect(RTLIL::SigSig(it.second, other_sig)); assign_map.add(it.second, other_sig); } } - log(" Removing %s cell `%s' from module `%s'.\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str()); + log_debug(" Removing %s cell `%s' from module `%s'.\n", cell->type.c_str(), cell->name.c_str(), module->name.c_str()); #ifdef USE_CELL_HASH_CACHE cell_hash_cache.erase(cell); #endif @@ -334,12 +336,14 @@ struct OptMergeWorker } } } + + log_suppressed(); } }; struct OptMergePass : public Pass { OptMergePass() : Pass("opt_merge", "consolidate identical cells") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -355,7 +359,7 @@ struct OptMergePass : public Pass { log(" Operate on all cell types, not just built-in types.\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { log_header(design, "Executing OPT_MERGE pass (detect identical cells).\n"); diff --git a/passes/opt/opt_muxtree.cc b/passes/opt/opt_muxtree.cc index f5ddc2af9..3c486bbcc 100644 --- a/passes/opt/opt_muxtree.cc +++ b/passes/opt/opt_muxtree.cc @@ -36,6 +36,7 @@ struct OptMuxtreeWorker RTLIL::Module *module; SigMap assign_map; int removed_count; + int glob_abort_cnt = 100000; struct bitinfo_t { bool seen_non_mux; @@ -83,12 +84,12 @@ struct OptMuxtreeWorker // .const_deactivated for (auto cell : module->cells()) { - if (cell->type == "$mux" || cell->type == "$pmux") + if (cell->type.in(ID($mux), ID($pmux))) { - RTLIL::SigSpec sig_a = cell->getPort("\\A"); - RTLIL::SigSpec sig_b = cell->getPort("\\B"); - RTLIL::SigSpec sig_s = cell->getPort("\\S"); - RTLIL::SigSpec sig_y = cell->getPort("\\Y"); + RTLIL::SigSpec sig_a = cell->getPort(ID::A); + RTLIL::SigSpec sig_b = cell->getPort(ID::B); + RTLIL::SigSpec sig_s = cell->getPort(ID(S)); + RTLIL::SigSpec sig_y = cell->getPort(ID::Y); muxinfo_t muxinfo; muxinfo.cell = cell; @@ -136,7 +137,7 @@ struct OptMuxtreeWorker } } for (auto wire : module->wires()) { - if (wire->port_output || wire->get_bool_attribute("\\keep")) + if (wire->port_output || wire->get_bool_attribute(ID::keep)) for (int idx : sig2bits(RTLIL::SigSpec(wire))) bit2info[idx].seen_non_mux = true; } @@ -180,20 +181,29 @@ struct OptMuxtreeWorker for (int mux_idx = 0; mux_idx < GetSize(root_muxes); mux_idx++) if (root_muxes.at(mux_idx)) { - log(" Root of a mux tree: %s%s\n", log_id(mux2info[mux_idx].cell), root_enable_muxes.at(mux_idx) ? " (pure)" : ""); + log_debug(" Root of a mux tree: %s%s\n", log_id(mux2info[mux_idx].cell), root_enable_muxes.at(mux_idx) ? " (pure)" : ""); root_mux_rerun.erase(mux_idx); eval_root_mux(mux_idx); + if (glob_abort_cnt == 0) { + log(" Giving up (too many iterations)\n"); + return; + } } while (!root_mux_rerun.empty()) { int mux_idx = *root_mux_rerun.begin(); - log(" Root of a mux tree: %s (rerun as non-pure)\n", log_id(mux2info[mux_idx].cell)); + log_debug(" Root of a mux tree: %s (rerun as non-pure)\n", log_id(mux2info[mux_idx].cell)); log_assert(root_enable_muxes.at(mux_idx)); root_mux_rerun.erase(mux_idx); eval_root_mux(mux_idx); + if (glob_abort_cnt == 0) { + log(" Giving up (too many iterations)\n"); + return; + } } log(" Analyzing evaluation results.\n"); + log_assert(glob_abort_cnt > 0); for (auto &mi : mux2info) { @@ -217,10 +227,10 @@ struct OptMuxtreeWorker continue; } - RTLIL::SigSpec sig_a = mi.cell->getPort("\\A"); - RTLIL::SigSpec sig_b = mi.cell->getPort("\\B"); - RTLIL::SigSpec sig_s = mi.cell->getPort("\\S"); - RTLIL::SigSpec sig_y = mi.cell->getPort("\\Y"); + RTLIL::SigSpec sig_a = mi.cell->getPort(ID::A); + RTLIL::SigSpec sig_b = mi.cell->getPort(ID::B); + RTLIL::SigSpec sig_s = mi.cell->getPort(ID(S)); + RTLIL::SigSpec sig_y = mi.cell->getPort(ID::Y); RTLIL::SigSpec sig_ports = sig_b; sig_ports.append(sig_a); @@ -245,14 +255,14 @@ struct OptMuxtreeWorker } } - mi.cell->setPort("\\A", new_sig_a); - mi.cell->setPort("\\B", new_sig_b); - mi.cell->setPort("\\S", new_sig_s); + mi.cell->setPort(ID::A, new_sig_a); + mi.cell->setPort(ID::B, new_sig_b); + mi.cell->setPort(ID(S), new_sig_s); if (GetSize(new_sig_s) == 1) { - mi.cell->type = "$mux"; - mi.cell->parameters.erase("\\S_WIDTH"); + mi.cell->type = ID($mux); + mi.cell->parameters.erase(ID(S_WIDTH)); } else { - mi.cell->parameters["\\S_WIDTH"] = RTLIL::Const(GetSize(new_sig_s)); + mi.cell->parameters[ID(S_WIDTH)] = RTLIL::Const(GetSize(new_sig_s)); } } } @@ -293,6 +303,9 @@ struct OptMuxtreeWorker void eval_mux_port(knowledge_t &knowledge, int mux_idx, int port_idx, bool do_replace_known, bool do_enable_ports, int abort_count) { + if (glob_abort_cnt == 0) + return; + muxinfo_t &muxinfo = mux2info[mux_idx]; if (do_enable_ports) @@ -315,18 +328,21 @@ struct OptMuxtreeWorker knowledge.visited_muxes[m] = true; parent_muxes.push_back(m); } - for (int m : parent_muxes) + for (int m : parent_muxes) { if (root_enable_muxes.at(m)) continue; else if (root_muxes.at(m)) { if (abort_count == 0) { root_mux_rerun.insert(m); root_enable_muxes.at(m) = true; - log(" Removing pure flag from root mux %s.\n", log_id(mux2info[m].cell)); + log_debug(" Removing pure flag from root mux %s.\n", log_id(mux2info[m].cell)); } else eval_mux(knowledge, m, false, do_enable_ports, abort_count - 1); } else eval_mux(knowledge, m, do_replace_known, do_enable_ports, abort_count); + if (glob_abort_cnt == 0) + return; + } for (int m : parent_muxes) knowledge.visited_muxes[m] = false; @@ -348,9 +364,9 @@ struct OptMuxtreeWorker int width = 0; idict<int> ctrl_bits; - if (portname == "\\B") - width = GetSize(muxinfo.cell->getPort("\\A")); - for (int bit : sig2bits(muxinfo.cell->getPort("\\S"), false)) + if (portname == ID::B) + width = GetSize(muxinfo.cell->getPort(ID::A)); + for (int bit : sig2bits(muxinfo.cell->getPort(ID(S)), false)) ctrl_bits(bit); int port_idx = 0, port_off = 0; @@ -390,12 +406,16 @@ struct OptMuxtreeWorker void eval_mux(knowledge_t &knowledge, int mux_idx, bool do_replace_known, bool do_enable_ports, int abort_count) { + if (glob_abort_cnt == 0) + return; + glob_abort_cnt--; + muxinfo_t &muxinfo = mux2info[mux_idx]; // set input ports to constants if we find known active or inactive signals if (do_replace_known) { - replace_known(knowledge, muxinfo, "\\A"); - replace_known(knowledge, muxinfo, "\\B"); + replace_known(knowledge, muxinfo, ID::A); + replace_known(knowledge, muxinfo, ID::B); } // if there is a constant activated port we just use it @@ -433,11 +453,15 @@ struct OptMuxtreeWorker if (knowledge.known_inactive.at(portinfo.ctrl_sig)) continue; eval_mux_port(knowledge, mux_idx, port_idx, do_replace_known, do_enable_ports, abort_count); + + if (glob_abort_cnt == 0) + return; } } void eval_root_mux(int mux_idx) { + log_assert(glob_abort_cnt > 0); knowledge_t knowledge; knowledge.known_inactive.resize(GetSize(bit2info)); knowledge.known_active.resize(GetSize(bit2info)); @@ -449,7 +473,7 @@ struct OptMuxtreeWorker struct OptMuxtreePass : public Pass { OptMuxtreePass() : Pass("opt_muxtree", "eliminate dead trees in multiplexer trees") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -462,7 +486,7 @@ struct OptMuxtreePass : public Pass { log("This pass only operates on completely selected modules without processes.\n"); log("\n"); } - virtual void execute(vector<std::string> args, RTLIL::Design *design) + void execute(vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { log_header(design, "Executing OPT_MUXTREE pass (detect dead branches in mux trees).\n"); extra_args(args, 1, design); diff --git a/passes/opt/opt_reduce.cc b/passes/opt/opt_reduce.cc index 8126f3c0d..f74655d1c 100644 --- a/passes/opt/opt_reduce.cc +++ b/passes/opt/opt_reduce.cc @@ -43,14 +43,14 @@ struct OptReduceWorker return; cells.erase(cell); - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); sig_a.sort_and_unify(); pool<RTLIL::SigBit> new_sig_a_bits; - for (auto &bit : sig_a.to_sigbit_set()) + for (auto &bit : sig_a) { if (bit == RTLIL::State::S0) { - if (cell->type == "$reduce_and") { + if (cell->type == ID($reduce_and)) { new_sig_a_bits.clear(); new_sig_a_bits.insert(RTLIL::State::S0); break; @@ -58,7 +58,7 @@ struct OptReduceWorker continue; } if (bit == RTLIL::State::S1) { - if (cell->type == "$reduce_or") { + if (cell->type == ID($reduce_or)) { new_sig_a_bits.clear(); new_sig_a_bits.insert(RTLIL::State::S1); break; @@ -74,8 +74,8 @@ struct OptReduceWorker for (auto child_cell : drivers.find(bit)) { if (child_cell->type == cell->type) { opt_reduce(cells, drivers, child_cell); - if (child_cell->getPort("\\Y")[0] == bit) { - pool<RTLIL::SigBit> child_sig_a_bits = assign_map(child_cell->getPort("\\A")).to_sigbit_pool(); + if (child_cell->getPort(ID::Y)[0] == bit) { + pool<RTLIL::SigBit> child_sig_a_bits = assign_map(child_cell->getPort(ID::A)).to_sigbit_pool(); new_sig_a_bits.insert(child_sig_a_bits.begin(), child_sig_a_bits.end()); } else new_sig_a_bits.insert(RTLIL::State::S0); @@ -89,22 +89,22 @@ struct OptReduceWorker RTLIL::SigSpec new_sig_a(new_sig_a_bits); new_sig_a.sort_and_unify(); - if (new_sig_a != sig_a || sig_a.size() != cell->getPort("\\A").size()) { + if (new_sig_a != sig_a || sig_a.size() != cell->getPort(ID::A).size()) { log(" New input vector for %s cell %s: %s\n", cell->type.c_str(), cell->name.c_str(), log_signal(new_sig_a)); did_something = true; total_count++; } - cell->setPort("\\A", new_sig_a); - cell->parameters["\\A_WIDTH"] = RTLIL::Const(new_sig_a.size()); + cell->setPort(ID::A, new_sig_a); + cell->parameters[ID(A_WIDTH)] = RTLIL::Const(new_sig_a.size()); return; } void opt_mux(RTLIL::Cell *cell) { - RTLIL::SigSpec sig_a = assign_map(cell->getPort("\\A")); - RTLIL::SigSpec sig_b = assign_map(cell->getPort("\\B")); - RTLIL::SigSpec sig_s = assign_map(cell->getPort("\\S")); + RTLIL::SigSpec sig_a = assign_map(cell->getPort(ID::A)); + RTLIL::SigSpec sig_b = assign_map(cell->getPort(ID::B)); + RTLIL::SigSpec sig_s = assign_map(cell->getPort(ID(S))); RTLIL::SigSpec new_sig_b, new_sig_s; pool<RTLIL::SigSpec> handled_sig; @@ -125,15 +125,15 @@ struct OptReduceWorker if (this_s.size() > 1) { - RTLIL::Cell *reduce_or_cell = module->addCell(NEW_ID, "$reduce_or"); - reduce_or_cell->setPort("\\A", this_s); - reduce_or_cell->parameters["\\A_SIGNED"] = RTLIL::Const(0); - reduce_or_cell->parameters["\\A_WIDTH"] = RTLIL::Const(this_s.size()); - reduce_or_cell->parameters["\\Y_WIDTH"] = RTLIL::Const(1); + RTLIL::Cell *reduce_or_cell = module->addCell(NEW_ID, ID($reduce_or)); + reduce_or_cell->setPort(ID::A, this_s); + reduce_or_cell->parameters[ID(A_SIGNED)] = RTLIL::Const(0); + reduce_or_cell->parameters[ID(A_WIDTH)] = RTLIL::Const(this_s.size()); + reduce_or_cell->parameters[ID(Y_WIDTH)] = RTLIL::Const(1); RTLIL::Wire *reduce_or_wire = module->addWire(NEW_ID); this_s = RTLIL::SigSpec(reduce_or_wire); - reduce_or_cell->setPort("\\Y", this_s); + reduce_or_cell->setPort(ID::Y, this_s); } new_sig_b.append(this_b); @@ -149,28 +149,28 @@ struct OptReduceWorker if (new_sig_s.size() == 0) { - module->connect(RTLIL::SigSig(cell->getPort("\\Y"), cell->getPort("\\A"))); - assign_map.add(cell->getPort("\\Y"), cell->getPort("\\A")); + module->connect(RTLIL::SigSig(cell->getPort(ID::Y), cell->getPort(ID::A))); + assign_map.add(cell->getPort(ID::Y), cell->getPort(ID::A)); module->remove(cell); } else { - cell->setPort("\\B", new_sig_b); - cell->setPort("\\S", new_sig_s); + cell->setPort(ID::B, new_sig_b); + cell->setPort(ID(S), new_sig_s); if (new_sig_s.size() > 1) { - cell->parameters["\\S_WIDTH"] = RTLIL::Const(new_sig_s.size()); + cell->parameters[ID(S_WIDTH)] = RTLIL::Const(new_sig_s.size()); } else { - cell->type = "$mux"; - cell->parameters.erase("\\S_WIDTH"); + cell->type = ID($mux); + cell->parameters.erase(ID(S_WIDTH)); } } } void opt_mux_bits(RTLIL::Cell *cell) { - std::vector<RTLIL::SigBit> sig_a = assign_map(cell->getPort("\\A")).to_sigbit_vector(); - std::vector<RTLIL::SigBit> sig_b = assign_map(cell->getPort("\\B")).to_sigbit_vector(); - std::vector<RTLIL::SigBit> sig_y = assign_map(cell->getPort("\\Y")).to_sigbit_vector(); + std::vector<RTLIL::SigBit> sig_a = assign_map(cell->getPort(ID::A)).to_sigbit_vector(); + std::vector<RTLIL::SigBit> sig_b = assign_map(cell->getPort(ID::B)).to_sigbit_vector(); + std::vector<RTLIL::SigBit> sig_y = assign_map(cell->getPort(ID::Y)).to_sigbit_vector(); std::vector<RTLIL::SigBit> new_sig_y; RTLIL::SigSig old_sig_conn; @@ -211,33 +211,32 @@ struct OptReduceWorker if (new_sig_y.size() != sig_y.size()) { log(" Consolidated identical input bits for %s cell %s:\n", cell->type.c_str(), cell->name.c_str()); - log(" Old ports: A=%s, B=%s, Y=%s\n", log_signal(cell->getPort("\\A")), - log_signal(cell->getPort("\\B")), log_signal(cell->getPort("\\Y"))); + log(" Old ports: A=%s, B=%s, Y=%s\n", log_signal(cell->getPort(ID::A)), + log_signal(cell->getPort(ID::B)), log_signal(cell->getPort(ID::Y))); - cell->setPort("\\A", RTLIL::SigSpec()); + cell->setPort(ID::A, RTLIL::SigSpec()); for (auto &in_tuple : consolidated_in_tuples) { - RTLIL::SigSpec new_a = cell->getPort("\\A"); + RTLIL::SigSpec new_a = cell->getPort(ID::A); new_a.append(in_tuple.at(0)); - cell->setPort("\\A", new_a); + cell->setPort(ID::A, new_a); } - cell->setPort("\\B", RTLIL::SigSpec()); - for (int i = 1; i <= cell->getPort("\\S").size(); i++) + cell->setPort(ID::B, RTLIL::SigSpec()); + for (int i = 1; i <= cell->getPort(ID(S)).size(); i++) for (auto &in_tuple : consolidated_in_tuples) { - RTLIL::SigSpec new_b = cell->getPort("\\B"); + RTLIL::SigSpec new_b = cell->getPort(ID::B); new_b.append(in_tuple.at(i)); - cell->setPort("\\B", new_b); + cell->setPort(ID::B, new_b); } - cell->parameters["\\WIDTH"] = RTLIL::Const(new_sig_y.size()); - cell->setPort("\\Y", new_sig_y); + cell->parameters[ID(WIDTH)] = RTLIL::Const(new_sig_y.size()); + cell->setPort(ID::Y, new_sig_y); - log(" New ports: A=%s, B=%s, Y=%s\n", log_signal(cell->getPort("\\A")), - log_signal(cell->getPort("\\B")), log_signal(cell->getPort("\\Y"))); + log(" New ports: A=%s, B=%s, Y=%s\n", log_signal(cell->getPort(ID::A)), + log_signal(cell->getPort(ID::B)), log_signal(cell->getPort(ID::Y))); log(" New connections: %s = %s\n", log_signal(old_sig_conn.first), log_signal(old_sig_conn.second)); module->connect(old_sig_conn); - module->check(); did_something = true; total_count++; @@ -255,15 +254,15 @@ struct OptReduceWorker SigPool mem_wren_sigs; for (auto &cell_it : module->cells_) { RTLIL::Cell *cell = cell_it.second; - if (cell->type == "$mem") - mem_wren_sigs.add(assign_map(cell->getPort("\\WR_EN"))); - if (cell->type == "$memwr") - mem_wren_sigs.add(assign_map(cell->getPort("\\EN"))); + if (cell->type == ID($mem)) + mem_wren_sigs.add(assign_map(cell->getPort(ID(WR_EN)))); + if (cell->type == ID($memwr)) + mem_wren_sigs.add(assign_map(cell->getPort(ID(EN)))); } for (auto &cell_it : module->cells_) { RTLIL::Cell *cell = cell_it.second; - if (cell->type == "$dff" && mem_wren_sigs.check_any(assign_map(cell->getPort("\\Q")))) - mem_wren_sigs.add(assign_map(cell->getPort("\\D"))); + if (cell->type == ID($dff) && mem_wren_sigs.check_any(assign_map(cell->getPort(ID(Q))))) + mem_wren_sigs.add(assign_map(cell->getPort(ID(D)))); } bool keep_expanding_mem_wren_sigs = true; @@ -271,12 +270,12 @@ struct OptReduceWorker keep_expanding_mem_wren_sigs = false; for (auto &cell_it : module->cells_) { RTLIL::Cell *cell = cell_it.second; - if (cell->type == "$mux" && mem_wren_sigs.check_any(assign_map(cell->getPort("\\Y")))) { - if (!mem_wren_sigs.check_all(assign_map(cell->getPort("\\A"))) || - !mem_wren_sigs.check_all(assign_map(cell->getPort("\\B")))) + if (cell->type == ID($mux) && mem_wren_sigs.check_any(assign_map(cell->getPort(ID::Y)))) { + if (!mem_wren_sigs.check_all(assign_map(cell->getPort(ID::A))) || + !mem_wren_sigs.check_all(assign_map(cell->getPort(ID::B)))) keep_expanding_mem_wren_sigs = true; - mem_wren_sigs.add(assign_map(cell->getPort("\\A"))); - mem_wren_sigs.add(assign_map(cell->getPort("\\B"))); + mem_wren_sigs.add(assign_map(cell->getPort(ID::A))); + mem_wren_sigs.add(assign_map(cell->getPort(ID::B))); } } } @@ -288,7 +287,7 @@ struct OptReduceWorker // merge trees of reduce_* cells to one single cell and unify input vectors // (only handle reduce_and and reduce_or for various reasons) - const char *type_list[] = { "$reduce_or", "$reduce_and" }; + const IdString type_list[] = { ID($reduce_or), ID($reduce_and) }; for (auto type : type_list) { SigSet<RTLIL::Cell*> drivers; @@ -298,7 +297,7 @@ struct OptReduceWorker RTLIL::Cell *cell = cell_it.second; if (cell->type != type || !design->selected(module, cell)) continue; - drivers.insert(assign_map(cell->getPort("\\Y")), cell); + drivers.insert(assign_map(cell->getPort(ID::Y)), cell); cells.insert(cell); } @@ -313,25 +312,27 @@ struct OptReduceWorker std::vector<RTLIL::Cell*> cells; for (auto &it : module->cells_) - if ((it.second->type == "$mux" || it.second->type == "$pmux") && design->selected(module, it.second)) + if ((it.second->type == ID($mux) || it.second->type == ID($pmux)) && design->selected(module, it.second)) cells.push_back(it.second); for (auto cell : cells) { // this optimization is to aggressive for most coarse-grain applications. // but we always want it for multiplexers driving write enable ports. - if (do_fine || mem_wren_sigs.check_any(assign_map(cell->getPort("\\Y")))) + if (do_fine || mem_wren_sigs.check_any(assign_map(cell->getPort(ID::Y)))) opt_mux_bits(cell); opt_mux(cell); } } + + module->check(); } }; struct OptReducePass : public Pass { OptReducePass() : Pass("opt_reduce", "simplify large MUXes and AND/OR gates") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -352,7 +353,7 @@ struct OptReducePass : public Pass { log(" alias for -fine\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { bool do_fine = false; diff --git a/passes/opt/opt_rmdff.cc b/passes/opt/opt_rmdff.cc index 02f3e93f5..0bf74098a 100644 --- a/passes/opt/opt_rmdff.cc +++ b/passes/opt/opt_rmdff.cc @@ -17,26 +17,31 @@ * */ +#include "kernel/log.h" #include "kernel/register.h" +#include "kernel/rtlil.h" +#include "kernel/satgen.h" #include "kernel/sigtools.h" -#include "kernel/log.h" -#include <stdlib.h> #include <stdio.h> +#include <stdlib.h> USING_YOSYS_NAMESPACE PRIVATE_NAMESPACE_BEGIN SigMap assign_map, dff_init_map; SigSet<RTLIL::Cell*> mux_drivers; +dict<SigBit, RTLIL::Cell*> bit2driver; dict<SigBit, pool<SigBit>> init_attributes; + bool keepdc; +bool sat; void remove_init_attr(SigSpec sig) { for (auto bit : assign_map(sig)) if (init_attributes.count(bit)) for (auto wbit : init_attributes.at(bit)) - wbit.wire->attributes.at("\\init")[wbit.offset] = State::Sx; + wbit.wire->attributes.at(ID(init))[wbit.offset] = State::Sx; } bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell) @@ -44,39 +49,39 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell) SigSpec sig_set, sig_clr; State pol_set, pol_clr; - if (cell->hasPort("\\S")) - sig_set = cell->getPort("\\S"); + if (cell->hasPort(ID(S))) + sig_set = cell->getPort(ID(S)); - if (cell->hasPort("\\R")) - sig_clr = cell->getPort("\\R"); + if (cell->hasPort(ID(R))) + sig_clr = cell->getPort(ID(R)); - if (cell->hasPort("\\SET")) - sig_set = cell->getPort("\\SET"); + if (cell->hasPort(ID(SET))) + sig_set = cell->getPort(ID(SET)); - if (cell->hasPort("\\CLR")) - sig_clr = cell->getPort("\\CLR"); + if (cell->hasPort(ID(CLR))) + sig_clr = cell->getPort(ID(CLR)); log_assert(GetSize(sig_set) == GetSize(sig_clr)); - if (cell->type.substr(0,8) == "$_DFFSR_") { + if (cell->type.begins_with("$_DFFSR_")) { pol_set = cell->type[9] == 'P' ? State::S1 : State::S0; pol_clr = cell->type[10] == 'P' ? State::S1 : State::S0; } else - if (cell->type.substr(0,11) == "$_DLATCHSR_") { + if (cell->type.begins_with("$_DLATCHSR_")) { pol_set = cell->type[12] == 'P' ? State::S1 : State::S0; pol_clr = cell->type[13] == 'P' ? State::S1 : State::S0; } else - if (cell->type == "$dffsr" || cell->type == "$dlatchsr") { - pol_set = cell->parameters["\\SET_POLARITY"].as_bool() ? State::S1 : State::S0; - pol_clr = cell->parameters["\\CLR_POLARITY"].as_bool() ? State::S1 : State::S0; + if (cell->type.in(ID($dffsr), ID($dlatchsr))) { + pol_set = cell->parameters[ID(SET_POLARITY)].as_bool() ? State::S1 : State::S0; + pol_clr = cell->parameters[ID(CLR_POLARITY)].as_bool() ? State::S1 : State::S0; } else log_abort(); State npol_set = pol_set == State::S0 ? State::S1 : State::S0; State npol_clr = pol_clr == State::S0 ? State::S1 : State::S0; - SigSpec sig_d = cell->getPort("\\D"); - SigSpec sig_q = cell->getPort("\\Q"); + SigSpec sig_d = cell->getPort(ID(D)); + SigSpec sig_q = cell->getPort(ID(Q)); bool did_something = false; bool proper_sr = false; @@ -132,20 +137,20 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell) return true; } - if (cell->type == "$dffsr" || cell->type == "$dlatchsr") + if (cell->type.in(ID($dffsr), ID($dlatchsr))) { - cell->setParam("\\WIDTH", GetSize(sig_d)); - cell->setPort("\\SET", sig_set); - cell->setPort("\\CLR", sig_clr); - cell->setPort("\\D", sig_d); - cell->setPort("\\Q", sig_q); + cell->setParam(ID(WIDTH), GetSize(sig_d)); + cell->setPort(ID(SET), sig_set); + cell->setPort(ID(CLR), sig_clr); + cell->setPort(ID(D), sig_d); + cell->setPort(ID(Q), sig_q); } else { - cell->setPort("\\S", sig_set); - cell->setPort("\\R", sig_clr); - cell->setPort("\\D", sig_d); - cell->setPort("\\Q", sig_q); + cell->setPort(ID(S), sig_set); + cell->setPort(ID(R), sig_clr); + cell->setPort(ID(D), sig_d); + cell->setPort(ID(Q), sig_q); } if (proper_sr) @@ -154,46 +159,48 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell) if (used_pol_set && used_pol_clr && pol_set != pol_clr) return did_something; + if (cell->type == ID($dlatchsr)) + return did_something; + State unified_pol = used_pol_set ? pol_set : pol_clr; - if (cell->type == "$dffsr") + if (cell->type == ID($dffsr)) { if (hasreset) { log("Converting %s (%s) to %s in module %s.\n", log_id(cell), log_id(cell->type), "$adff", log_id(mod)); - cell->type = "$adff"; - cell->setParam("\\ARST_POLARITY", unified_pol); - cell->setParam("\\ARST_VALUE", reset_val); - cell->setPort("\\ARST", sig_reset); + cell->type = ID($adff); + cell->setParam(ID(ARST_POLARITY), unified_pol); + cell->setParam(ID(ARST_VALUE), reset_val); + cell->setPort(ID(ARST), sig_reset); - cell->unsetParam("\\SET_POLARITY"); - cell->unsetParam("\\CLR_POLARITY"); - cell->unsetPort("\\SET"); - cell->unsetPort("\\CLR"); - - return true; + cell->unsetParam(ID(SET_POLARITY)); + cell->unsetParam(ID(CLR_POLARITY)); + cell->unsetPort(ID(SET)); + cell->unsetPort(ID(CLR)); } else { log("Converting %s (%s) to %s in module %s.\n", log_id(cell), log_id(cell->type), "$dff", log_id(mod)); - cell->type = "$dff"; - cell->unsetParam("\\SET_POLARITY"); - cell->unsetParam("\\CLR_POLARITY"); - cell->unsetPort("\\SET"); - cell->unsetPort("\\CLR"); - - return true; + cell->type = ID($dff); + cell->unsetParam(ID(SET_POLARITY)); + cell->unsetParam(ID(CLR_POLARITY)); + cell->unsetPort(ID(SET)); + cell->unsetPort(ID(CLR)); } + + return true; } - else + + if (!hasreset) { IdString new_type; - if (cell->type.substr(0,8) == "$_DFFSR_") + if (cell->type.begins_with("$_DFFSR_")) new_type = stringf("$_DFF_%c_", cell->type[8]); - else if (cell->type.substr(0,11) == "$_DLATCHSR_") + else if (cell->type.begins_with("$_DLATCHSR_")) new_type = stringf("$_DLATCH_%c_", cell->type[11]); else log_abort(); @@ -201,11 +208,13 @@ bool handle_dffsr(RTLIL::Module *mod, RTLIL::Cell *cell) log("Converting %s (%s) to %s in module %s.\n", log_id(cell), log_id(cell->type), log_id(new_type), log_id(mod)); cell->type = new_type; - cell->unsetPort("\\S"); - cell->unsetPort("\\R"); + cell->unsetPort(ID(S)); + cell->unsetPort(ID(R)); - return did_something; + return true; } + + return did_something; } bool handle_dlatch(RTLIL::Module *mod, RTLIL::Cell *dlatch) @@ -213,18 +222,18 @@ bool handle_dlatch(RTLIL::Module *mod, RTLIL::Cell *dlatch) SigSpec sig_e; State on_state, off_state; - if (dlatch->type == "$dlatch") { - sig_e = assign_map(dlatch->getPort("\\EN")); - on_state = dlatch->getParam("\\EN_POLARITY").as_bool() ? State::S1 : State::S0; - off_state = dlatch->getParam("\\EN_POLARITY").as_bool() ? State::S0 : State::S1; + if (dlatch->type == ID($dlatch)) { + sig_e = assign_map(dlatch->getPort(ID(EN))); + on_state = dlatch->getParam(ID(EN_POLARITY)).as_bool() ? State::S1 : State::S0; + off_state = dlatch->getParam(ID(EN_POLARITY)).as_bool() ? State::S0 : State::S1; } else - if (dlatch->type == "$_DLATCH_P_") { - sig_e = assign_map(dlatch->getPort("\\E")); + if (dlatch->type == ID($_DLATCH_P_)) { + sig_e = assign_map(dlatch->getPort(ID(E))); on_state = State::S1; off_state = State::S0; } else - if (dlatch->type == "$_DLATCH_N_") { - sig_e = assign_map(dlatch->getPort("\\E")); + if (dlatch->type == ID($_DLATCH_N_)) { + sig_e = assign_map(dlatch->getPort(ID(E))); on_state = State::S0; off_state = State::S1; } else @@ -233,15 +242,15 @@ bool handle_dlatch(RTLIL::Module *mod, RTLIL::Cell *dlatch) if (sig_e == off_state) { RTLIL::Const val_init; - for (auto bit : dff_init_map(dlatch->getPort("\\Q"))) + for (auto bit : dff_init_map(dlatch->getPort(ID(Q)))) val_init.bits.push_back(bit.wire == NULL ? bit.data : State::Sx); - mod->connect(dlatch->getPort("\\Q"), val_init); + mod->connect(dlatch->getPort(ID(Q)), val_init); goto delete_dlatch; } if (sig_e == on_state) { - mod->connect(dlatch->getPort("\\Q"), dlatch->getPort("\\D")); + mod->connect(dlatch->getPort(ID(Q)), dlatch->getPort(ID(D))); goto delete_dlatch; } @@ -249,56 +258,74 @@ bool handle_dlatch(RTLIL::Module *mod, RTLIL::Cell *dlatch) delete_dlatch: log("Removing %s (%s) from module %s.\n", log_id(dlatch), log_id(dlatch->type), log_id(mod)); - remove_init_attr(dlatch->getPort("\\Q")); + remove_init_attr(dlatch->getPort(ID(Q))); mod->remove(dlatch); return true; } bool handle_dff(RTLIL::Module *mod, RTLIL::Cell *dff) { - RTLIL::SigSpec sig_d, sig_q, sig_c, sig_r; - RTLIL::Const val_cp, val_rp, val_rv; + RTLIL::SigSpec sig_d, sig_q, sig_c, sig_r, sig_e; + RTLIL::Const val_cp, val_rp, val_rv, val_ep; - if (dff->type == "$_FF_") { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); + if (dff->type == ID($_FF_)) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); } - else if (dff->type == "$_DFF_N_" || dff->type == "$_DFF_P_") { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); - sig_c = dff->getPort("\\C"); - val_cp = RTLIL::Const(dff->type == "$_DFF_P_", 1); + else if (dff->type == ID($_DFF_N_) || dff->type == ID($_DFF_P_)) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(C)); + val_cp = RTLIL::Const(dff->type == ID($_DFF_P_), 1); } - else if (dff->type.substr(0,6) == "$_DFF_" && dff->type.substr(9) == "_" && + else if (dff->type.begins_with("$_DFF_") && dff->type.compare(9, 1, "_") == 0 && (dff->type[6] == 'N' || dff->type[6] == 'P') && (dff->type[7] == 'N' || dff->type[7] == 'P') && (dff->type[8] == '0' || dff->type[8] == '1')) { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); - sig_c = dff->getPort("\\C"); - sig_r = dff->getPort("\\R"); + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(C)); + sig_r = dff->getPort(ID(R)); val_cp = RTLIL::Const(dff->type[6] == 'P', 1); val_rp = RTLIL::Const(dff->type[7] == 'P', 1); val_rv = RTLIL::Const(dff->type[8] == '1', 1); } - else if (dff->type == "$ff") { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); + else if (dff->type.begins_with("$_DFFE_") && dff->type.compare(9, 1, "_") == 0 && + (dff->type[7] == 'N' || dff->type[7] == 'P') && + (dff->type[8] == 'N' || dff->type[8] == 'P')) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(C)); + sig_e = dff->getPort(ID(E)); + val_cp = RTLIL::Const(dff->type[7] == 'P', 1); + val_ep = RTLIL::Const(dff->type[8] == 'P', 1); + } + else if (dff->type == ID($ff)) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + } + else if (dff->type == ID($dff)) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(CLK)); + val_cp = RTLIL::Const(dff->parameters[ID(CLK_POLARITY)].as_bool(), 1); } - else if (dff->type == "$dff") { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); - sig_c = dff->getPort("\\CLK"); - val_cp = RTLIL::Const(dff->parameters["\\CLK_POLARITY"].as_bool(), 1); + else if (dff->type == ID($dffe)) { + sig_e = dff->getPort(ID(EN)); + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(CLK)); + val_cp = RTLIL::Const(dff->parameters[ID(CLK_POLARITY)].as_bool(), 1); + val_ep = RTLIL::Const(dff->parameters[ID(EN_POLARITY)].as_bool(), 1); } - else if (dff->type == "$adff") { - sig_d = dff->getPort("\\D"); - sig_q = dff->getPort("\\Q"); - sig_c = dff->getPort("\\CLK"); - sig_r = dff->getPort("\\ARST"); - val_cp = RTLIL::Const(dff->parameters["\\CLK_POLARITY"].as_bool(), 1); - val_rp = RTLIL::Const(dff->parameters["\\ARST_POLARITY"].as_bool(), 1); - val_rv = dff->parameters["\\ARST_VALUE"]; + else if (dff->type == ID($adff)) { + sig_d = dff->getPort(ID(D)); + sig_q = dff->getPort(ID(Q)); + sig_c = dff->getPort(ID(CLK)); + sig_r = dff->getPort(ID(ARST)); + val_cp = RTLIL::Const(dff->parameters[ID(CLK_POLARITY)].as_bool(), 1); + val_rp = RTLIL::Const(dff->parameters[ID(ARST_POLARITY)].as_bool(), 1); + val_rv = dff->parameters[ID(ARST_VALUE)]; } else log_abort(); @@ -316,12 +343,12 @@ bool handle_dff(RTLIL::Module *mod, RTLIL::Cell *dff) val_init.bits.push_back(bit.wire == NULL ? bit.data : RTLIL::State::Sx); } - if (dff->type.in("$ff", "$dff") && mux_drivers.has(sig_d)) { + if (dff->type.in(ID($ff), ID($dff)) && mux_drivers.has(sig_d)) { std::set<RTLIL::Cell*> muxes; mux_drivers.find(sig_d, muxes); for (auto mux : muxes) { - RTLIL::SigSpec sig_a = assign_map(mux->getPort("\\A")); - RTLIL::SigSpec sig_b = assign_map(mux->getPort("\\B")); + RTLIL::SigSpec sig_a = assign_map(mux->getPort(ID::A)); + RTLIL::SigSpec sig_b = assign_map(mux->getPort(ID::B)); if (sig_a == sig_q && sig_b.is_fully_const() && (!has_init || val_init == sig_b.as_const())) { mod->connect(sig_q, sig_b); goto delete_dff; @@ -333,85 +360,207 @@ bool handle_dff(RTLIL::Module *mod, RTLIL::Cell *dff) } } + // If clock is driven by a constant and (i) no reset signal + // (ii) Q has no initial value + // (iii) initial value is same as reset value if (!sig_c.empty() && sig_c.is_fully_const() && (!sig_r.size() || !has_init || val_init == val_rv)) { if (val_rv.bits.size() == 0) val_rv = val_init; + // Q is permanently reset value or initial value mod->connect(sig_q, val_rv); goto delete_dff; } + // If D is fully undefined and reset signal present and (i) Q has no initial value + // (ii) initial value is same as reset value if (sig_d.is_fully_undef() && sig_r.size() && (!has_init || val_init == val_rv)) { + // Q is permanently reset value mod->connect(sig_q, val_rv); goto delete_dff; } + // If D is fully undefined and no reset signal and Q has an initial value if (sig_d.is_fully_undef() && !sig_r.size() && has_init) { + // Q is permanently initial value mod->connect(sig_q, val_init); goto delete_dff; } + // If D is fully constant and (i) no reset signal + // (ii) reset value is same as constant D + // and (a) has no initial value + // (b) initial value same as constant D if (sig_d.is_fully_const() && (!sig_r.size() || val_rv == sig_d.as_const()) && (!has_init || val_init == sig_d.as_const())) { + // Q is permanently D mod->connect(sig_q, sig_d); goto delete_dff; } + // If D input is same as Q output and (i) no reset signal + // (ii) no initial signal + // (iii) initial value is same as reset value if (sig_d == sig_q && (sig_r.empty() || !has_init || val_init == val_rv)) { + // Q is permanently reset value or initial value if (sig_r.size()) mod->connect(sig_q, val_rv); - if (has_init) + else if (has_init) mod->connect(sig_q, val_init); goto delete_dff; } + // If reset signal is present, and is fully constant if (!sig_r.empty() && sig_r.is_fully_const()) { + // If reset value is permanently active or if reset is undefined if (sig_r == val_rp || sig_r.is_fully_undef()) { + // Q is permanently reset value mod->connect(sig_q, val_rv); goto delete_dff; } log("Removing unused reset from %s (%s) from module %s.\n", log_id(dff), log_id(dff->type), log_id(mod)); - if (dff->type == "$adff") { - dff->type = "$dff"; - dff->unsetPort("\\ARST"); - dff->unsetParam("\\ARST_POLARITY"); - dff->unsetParam("\\ARST_VALUE"); + if (dff->type == ID($adff)) { + dff->type = ID($dff); + dff->unsetPort(ID(ARST)); + dff->unsetParam(ID(ARST_POLARITY)); + dff->unsetParam(ID(ARST_VALUE)); return true; } - log_assert(dff->type.substr(0,6) == "$_DFF_"); + log_assert(dff->type.begins_with("$_DFF_")); dff->type = stringf("$_DFF_%c_", + dff->type[6]); - dff->unsetPort("\\R"); + dff->unsetPort(ID(R)); + } + + // If enable signal is present, and is fully constant + if (!sig_e.empty() && sig_e.is_fully_const()) + { + // If enable value is permanently inactive + if (sig_e != val_ep) { + // Q is permanently initial value + mod->connect(sig_q, val_init); + goto delete_dff; + } + + log("Removing unused enable from %s (%s) from module %s.\n", log_id(dff), log_id(dff->type), log_id(mod)); + + if (dff->type == ID($dffe)) { + dff->type = ID($dff); + dff->unsetPort(ID(EN)); + dff->unsetParam(ID(EN_POLARITY)); + return true; + } + + log_assert(dff->type.begins_with("$_DFFE_")); + dff->type = stringf("$_DFF_%c_", + dff->type[7]); + dff->unsetPort(ID(E)); + } + + if (sat && has_init && (!sig_r.size() || val_init == val_rv)) + { + bool removed_sigbits = false; + + ezSatPtr ez; + SatGen satgen(ez.get(), &assign_map); + pool<Cell*> sat_cells; + + std::function<void(Cell*)> sat_import_cell = [&](Cell *c) { + if (!sat_cells.insert(c).second) + return; + if (!satgen.importCell(c)) + return; + for (auto &conn : c->connections()) { + if (!c->input(conn.first)) + continue; + for (auto bit : assign_map(conn.second)) + if (bit2driver.count(bit)) + sat_import_cell(bit2driver.at(bit)); + } + }; + + // For each register bit, try to prove that it cannot change from the initial value. If so, remove it + for (int position = 0; position < GetSize(sig_d); position += 1) { + RTLIL::SigBit q_sigbit = sig_q[position]; + RTLIL::SigBit d_sigbit = sig_d[position]; + + if ((!q_sigbit.wire) || (!d_sigbit.wire)) + continue; + + if (!bit2driver.count(d_sigbit)) + continue; + + sat_import_cell(bit2driver.at(d_sigbit)); + + RTLIL::State sigbit_init_val = val_init[position]; + if (sigbit_init_val != State::S0 && sigbit_init_val != State::S1) + continue; + + int init_sat_pi = satgen.importSigSpec(sigbit_init_val).front(); + int q_sat_pi = satgen.importSigBit(q_sigbit); + int d_sat_pi = satgen.importSigBit(d_sigbit); + + // Try to find out whether the register bit can change under some circumstances + bool counter_example_found = ez->solve(ez->IFF(q_sat_pi, init_sat_pi), ez->NOT(ez->IFF(d_sat_pi, init_sat_pi))); + + // If the register bit cannot change, we can replace it with a constant + if (!counter_example_found) + { + log("Setting constant %d-bit at position %d on %s (%s) from module %s.\n", sigbit_init_val ? 1 : 0, + position, log_id(dff), log_id(dff->type), log_id(mod)); + + SigSpec tmp = dff->getPort(ID(D)); + tmp[position] = sigbit_init_val; + dff->setPort(ID(D), tmp); + + removed_sigbits = true; + } + } + + if (removed_sigbits) { + handle_dff(mod, dff); + return true; + } } + return false; delete_dff: log("Removing %s (%s) from module %s.\n", log_id(dff), log_id(dff->type), log_id(mod)); - remove_init_attr(dff->getPort("\\Q")); + remove_init_attr(dff->getPort(ID(Q))); mod->remove(dff); + + for (auto &entry : bit2driver) + if (entry.second == dff) + bit2driver.erase(entry.first); + return true; } struct OptRmdffPass : public Pass { OptRmdffPass() : Pass("opt_rmdff", "remove DFFs with constant inputs") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); - log(" opt_rmdff [-keepdc] [selection]\n"); + log(" opt_rmdff [-keepdc] [-sat] [selection]\n"); log("\n"); log("This pass identifies flip-flops with constant inputs and replaces them with\n"); log("a constant driver.\n"); log("\n"); + log(" -sat\n"); + log(" additionally invoke SAT solver to detect and remove flip-flops (with \n"); + log(" non-constant inputs) that can also be replaced with a constant driver\n"); + log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { int total_count = 0, total_initdrv = 0; log_header(design, "Executing OPT_RMDFF pass (remove dff with constant values).\n"); keepdc = false; + sat = false; size_t argidx; for (argidx = 1; argidx < args.size(); argidx++) { @@ -419,22 +568,28 @@ struct OptRmdffPass : public Pass { keepdc = true; continue; } + if (args[argidx] == "-sat") { + sat = true; + continue; + } break; } extra_args(args, argidx, design); - for (auto module : design->selected_modules()) - { + for (auto module : design->selected_modules()) { pool<SigBit> driven_bits; dict<SigBit, State> init_bits; assign_map.set(module); dff_init_map.set(module); + mux_drivers.clear(); + bit2driver.clear(); + init_attributes.clear(); for (auto wire : module->wires()) { - if (wire->attributes.count("\\init") != 0) { - Const initval = wire->attributes.at("\\init"); + if (wire->attributes.count(ID(init)) != 0) { + Const initval = wire->attributes.at(ID(init)); for (int i = 0; i < GetSize(initval) && i < GetSize(wire); i++) if (initval[i] == State::S0 || initval[i] == State::S1) dff_init_map.add(SigBit(wire, i), initval[i]); @@ -453,40 +608,45 @@ struct OptRmdffPass : public Pass { driven_bits.insert(bit); } } - mux_drivers.clear(); std::vector<RTLIL::IdString> dff_list; std::vector<RTLIL::IdString> dffsr_list; std::vector<RTLIL::IdString> dlatch_list; for (auto cell : module->cells()) { - for (auto &conn : cell->connections()) - if (cell->output(conn.first) || !cell->known()) - for (auto bit : assign_map(conn.second)) + for (auto &conn : cell->connections()) { + bool is_output = cell->output(conn.first); + if (is_output || !cell->known()) + for (auto bit : assign_map(conn.second)) { + if (is_output) + bit2driver[bit] = cell; driven_bits.insert(bit); + } + } - if (cell->type == "$mux" || cell->type == "$pmux") { - if (cell->getPort("\\A").size() == cell->getPort("\\B").size()) - mux_drivers.insert(assign_map(cell->getPort("\\Y")), cell); + if (cell->type.in(ID($mux), ID($pmux))) { + if (cell->getPort(ID::A).size() == cell->getPort(ID::B).size()) + mux_drivers.insert(assign_map(cell->getPort(ID::Y)), cell); continue; } if (!design->selected(module, cell)) continue; - if (cell->type.in("$_DFFSR_NNN_", "$_DFFSR_NNP_", "$_DFFSR_NPN_", "$_DFFSR_NPP_", - "$_DFFSR_PNN_", "$_DFFSR_PNP_", "$_DFFSR_PPN_", "$_DFFSR_PPP_", "$dffsr", - "$_DLATCHSR_NNN_", "$_DLATCHSR_NNP_", "$_DLATCHSR_NPN_", "$_DLATCHSR_NPP_", - "$_DLATCHSR_PNN_", "$_DLATCHSR_PNP_", "$_DLATCHSR_PPN_", "$_DLATCHSR_PPP_", "$dlatchsr")) + if (cell->type.in(ID($_DFFSR_NNN_), ID($_DFFSR_NNP_), ID($_DFFSR_NPN_), ID($_DFFSR_NPP_), + ID($_DFFSR_PNN_), ID($_DFFSR_PNP_), ID($_DFFSR_PPN_), ID($_DFFSR_PPP_), ID($dffsr), + ID($_DLATCHSR_NNN_), ID($_DLATCHSR_NNP_), ID($_DLATCHSR_NPN_), ID($_DLATCHSR_NPP_), + ID($_DLATCHSR_PNN_), ID($_DLATCHSR_PNP_), ID($_DLATCHSR_PPN_), ID($_DLATCHSR_PPP_), ID($dlatchsr))) dffsr_list.push_back(cell->name); - if (cell->type.in("$_FF_", "$_DFF_N_", "$_DFF_P_", - "$_DFF_NN0_", "$_DFF_NN1_", "$_DFF_NP0_", "$_DFF_NP1_", - "$_DFF_PN0_", "$_DFF_PN1_", "$_DFF_PP0_", "$_DFF_PP1_", - "$ff", "$dff", "$adff")) + if (cell->type.in(ID($_FF_), ID($_DFF_N_), ID($_DFF_P_), + ID($_DFF_NN0_), ID($_DFF_NN1_), ID($_DFF_NP0_), ID($_DFF_NP1_), + ID($_DFF_PN0_), ID($_DFF_PN1_), ID($_DFF_PP0_), ID($_DFF_PP1_), + ID($_DFFE_NN_), ID($_DFFE_NP_), ID($_DFFE_PN_), ID($_DFFE_PP_), + ID($ff), ID($dff), ID($dffe), ID($adff))) dff_list.push_back(cell->name); - if (cell->type.in("$dlatch", "$_DLATCH_P_", "$_DLATCH_N_")) + if (cell->type.in(ID($dlatch), ID($_DLATCH_P_), ID($_DLATCH_N_))) dlatch_list.push_back(cell->name); } @@ -534,6 +694,8 @@ struct OptRmdffPass : public Pass { assign_map.clear(); mux_drivers.clear(); + bit2driver.clear(); + init_attributes.clear(); if (total_count || total_initdrv) design->scratchpad_set_bool("opt.did_something", true); diff --git a/passes/opt/opt_share.cc b/passes/opt/opt_share.cc new file mode 100644 index 000000000..f59f978a6 --- /dev/null +++ b/passes/opt/opt_share.cc @@ -0,0 +1,657 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at> + * 2019 Bogdan Vukobratovic <bogdan.vukobratovic@gmail.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/log.h" +#include "kernel/register.h" +#include "kernel/rtlil.h" +#include "kernel/sigtools.h" +#include <algorithm> + +#include <stdio.h> +#include <stdlib.h> + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +SigMap assign_map; + +struct OpMuxConn { + RTLIL::SigSpec sig; + RTLIL::Cell *mux; + RTLIL::Cell *op; + int mux_port_id; + int mux_port_offset; + int op_outsig_offset; + + bool operator<(const OpMuxConn &other) const + { + if (mux != other.mux) + return mux < other.mux; + + if (mux_port_id != other.mux_port_id) + return mux_port_id < other.mux_port_id; + + return mux_port_offset < other.mux_port_offset; + } +}; + +// Helper class to track additiona information about a SigSpec, like whether it is signed and the semantics of the port it is connected to +struct ExtSigSpec { + RTLIL::SigSpec sig; + RTLIL::SigSpec sign; + bool is_signed; + RTLIL::IdString semantics; + + ExtSigSpec() {} + + ExtSigSpec(RTLIL::SigSpec s, RTLIL::SigSpec sign = RTLIL::Const(0, 1), bool is_signed = false, RTLIL::IdString semantics = RTLIL::IdString()) : sig(s), sign(sign), is_signed(is_signed), semantics(semantics) {} + + bool empty() const { return sig.empty(); } + + bool operator<(const ExtSigSpec &other) const + { + if (sig != other.sig) + return sig < other.sig; + + if (sign != other.sign) + return sign < other.sign; + + if (is_signed != other.is_signed) + return is_signed < other.is_signed; + + return semantics < other.semantics; + } + + bool operator==(const RTLIL::SigSpec &other) const { return (sign != RTLIL::Const(0, 1)) ? false : sig == other; } + bool operator==(const ExtSigSpec &other) const { return is_signed == other.is_signed && sign == other.sign && sig == other.sig && semantics == other.semantics; } +}; + +#define FINE_BITWISE_OPS ID($_AND_), ID($_NAND_), ID($_OR_), ID($_NOR_), ID($_XOR_), ID($_XNOR_), ID($_ANDNOT_), ID($_ORNOT_) + +#define BITWISE_OPS FINE_BITWISE_OPS, ID($and), ID($or), ID($xor), ID($xnor) + +#define REDUCTION_OPS ID($reduce_and), ID($reduce_or), ID($reduce_xor), ID($reduce_xnor), ID($reduce_bool), ID($reduce_nand) + +#define LOGICAL_OPS ID($logic_and), ID($logic_or) + +#define SHIFT_OPS ID($shl), ID($shr), ID($sshl), ID($sshr), ID($shift), ID($shiftx) + +#define RELATIONAL_OPS ID($lt), ID($le), ID($eq), ID($ne), ID($eqx), ID($nex), ID($ge), ID($gt) + +bool cell_supported(RTLIL::Cell *cell) +{ + if (cell->type.in(ID($alu))) { + RTLIL::SigSpec sig_bi = cell->getPort(ID(BI)); + RTLIL::SigSpec sig_ci = cell->getPort(ID(CI)); + + if (sig_bi.is_fully_const() && sig_ci.is_fully_const() && sig_bi == sig_ci) + return true; + } else if (cell->type.in(LOGICAL_OPS, SHIFT_OPS, BITWISE_OPS, RELATIONAL_OPS, ID($add), ID($sub), ID($mul), ID($div), ID($mod), ID($concat))) { + return true; + } + + return false; +} + +std::map<IdString, IdString> mergeable_type_map; + +bool mergeable(RTLIL::Cell *a, RTLIL::Cell *b) +{ + if (mergeable_type_map.empty()) { + mergeable_type_map.insert({ID($sub), ID($add)}); + } + auto a_type = a->type; + if (mergeable_type_map.count(a_type)) + a_type = mergeable_type_map.at(a_type); + + auto b_type = b->type; + if (mergeable_type_map.count(b_type)) + b_type = mergeable_type_map.at(b_type); + + return a_type == b_type; +} + +RTLIL::IdString decode_port_semantics(RTLIL::Cell *cell, RTLIL::IdString port_name) +{ + if (cell->type.in(ID($lt), ID($le), ID($ge), ID($gt), ID($div), ID($mod), ID($concat), SHIFT_OPS) && port_name == ID::B) + return port_name; + + return ""; +} + +RTLIL::SigSpec decode_port_sign(RTLIL::Cell *cell, RTLIL::IdString port_name) { + + if (cell->type == ID($alu) && port_name == ID::B) + return cell->getPort(ID(BI)); + else if (cell->type == ID($sub) && port_name == ID::B) + return RTLIL::Const(1, 1); + + return RTLIL::Const(0, 1); +} + +bool decode_port_signed(RTLIL::Cell *cell, RTLIL::IdString port_name) +{ + if (cell->type.in(BITWISE_OPS, LOGICAL_OPS)) + return false; + + if (cell->hasParam(port_name.str() + "_SIGNED")) + return cell->getParam(port_name.str() + "_SIGNED").as_bool(); + + return false; +} + +ExtSigSpec decode_port(RTLIL::Cell *cell, RTLIL::IdString port_name, SigMap *sigmap) +{ + auto sig = (*sigmap)(cell->getPort(port_name)); + + RTLIL::SigSpec sign = decode_port_sign(cell, port_name); + RTLIL::IdString semantics = decode_port_semantics(cell, port_name); + + bool is_signed = decode_port_signed(cell, port_name); + + return ExtSigSpec(sig, sign, is_signed, semantics); +} + +void merge_operators(RTLIL::Module *module, RTLIL::Cell *mux, const std::vector<OpMuxConn> &ports, const ExtSigSpec &operand) +{ + std::vector<ExtSigSpec> muxed_operands; + int max_width = 0; + for (const auto& p : ports) { + auto op = p.op; + + RTLIL::IdString muxed_port_name = ID::A; + if (decode_port(op, ID::A, &assign_map) == operand) + muxed_port_name = ID::B; + + auto operand = decode_port(op, muxed_port_name, &assign_map); + if (operand.sig.size() > max_width) + max_width = operand.sig.size(); + + muxed_operands.push_back(operand); + } + + auto shared_op = ports[0].op; + + if (std::any_of(muxed_operands.begin(), muxed_operands.end(), [&](ExtSigSpec &op) { return op.sign != muxed_operands[0].sign; })) + max_width = std::max(max_width, shared_op->getParam(ID(Y_WIDTH)).as_int()); + + + for (auto &operand : muxed_operands) + operand.sig.extend_u0(max_width, operand.is_signed); + + for (const auto& p : ports) { + auto op = p.op; + if (op == shared_op) + continue; + module->remove(op); + } + + for (auto &muxed_op : muxed_operands) + if (muxed_op.sign != muxed_operands[0].sign) + muxed_op = ExtSigSpec(module->Neg(NEW_ID, muxed_op.sig, muxed_op.is_signed)); + + RTLIL::SigSpec mux_y = mux->getPort(ID::Y); + RTLIL::SigSpec mux_a = mux->getPort(ID::A); + RTLIL::SigSpec mux_b = mux->getPort(ID::B); + RTLIL::SigSpec mux_s = mux->getPort(ID(S)); + + RTLIL::SigSpec shared_pmux_a = RTLIL::Const(RTLIL::State::Sx, max_width); + RTLIL::SigSpec shared_pmux_b; + RTLIL::SigSpec shared_pmux_s; + + int conn_width = ports[0].sig.size(); + int conn_offset = ports[0].mux_port_offset; + + shared_op->setPort(ID::Y, shared_op->getPort(ID::Y).extract(0, conn_width)); + + if (mux->type == ID($pmux)) { + shared_pmux_s = RTLIL::SigSpec(); + + for (const auto &p : ports) { + shared_pmux_s.append(mux_s[p.mux_port_id]); + mux_b.replace(p.mux_port_id * mux_a.size() + conn_offset, shared_op->getPort(ID::Y)); + } + } else { + shared_pmux_s = RTLIL::SigSpec{mux_s, module->Not(NEW_ID, mux_s)}; + mux_a.replace(conn_offset, shared_op->getPort(ID::Y)); + mux_b.replace(conn_offset, shared_op->getPort(ID::Y)); + } + + mux->setPort(ID::A, mux_a); + mux->setPort(ID::B, mux_b); + mux->setPort(ID::Y, mux_y); + mux->setPort(ID(S), mux_s); + + for (const auto &op : muxed_operands) + shared_pmux_b.append(op.sig); + + auto mux_to_oper = module->Pmux(NEW_ID, shared_pmux_a, shared_pmux_b, shared_pmux_s); + + if (shared_op->type.in(ID($alu))) { + RTLIL::SigSpec alu_x = shared_op->getPort(ID(X)); + RTLIL::SigSpec alu_co = shared_op->getPort(ID(CO)); + + shared_op->setPort(ID(X), alu_x.extract(0, conn_width)); + shared_op->setPort(ID(CO), alu_co.extract(0, conn_width)); + } + + bool is_fine = shared_op->type.in(FINE_BITWISE_OPS); + + if (!is_fine) + shared_op->setParam(ID(Y_WIDTH), conn_width); + + if (decode_port(shared_op, ID::A, &assign_map) == operand) { + shared_op->setPort(ID::B, mux_to_oper); + if (!is_fine) + shared_op->setParam(ID(B_WIDTH), max_width); + } else { + shared_op->setPort(ID::A, mux_to_oper); + if (!is_fine) + shared_op->setParam(ID(A_WIDTH), max_width); + } +} + +typedef struct { + RTLIL::Cell *mux; + std::vector<OpMuxConn> ports; + ExtSigSpec shared_operand; +} merged_op_t; + + +template <typename T> void remove_val(std::vector<T> &v, const std::vector<T> &vals) +{ + auto val_iter = vals.rbegin(); + for (auto i = v.rbegin(); i != v.rend(); ++i) + if ((val_iter != vals.rend()) && (*i == *val_iter)) { + v.erase(i.base() - 1); + ++val_iter; + } +} + +void check_muxed_operands(std::vector<const OpMuxConn *> &ports, const ExtSigSpec &shared_operand) +{ + auto it = ports.begin(); + ExtSigSpec seed; + + while (it != ports.end()) { + auto p = *it; + auto op = p->op; + + RTLIL::IdString muxed_port_name = ID::A; + if (decode_port(op, ID::A, &assign_map) == shared_operand) { + muxed_port_name = ID::B; + } + + auto operand = decode_port(op, muxed_port_name, &assign_map); + + if (seed.empty()) + seed = operand; + + if (operand.is_signed != seed.is_signed) { + ports.erase(it); + } else { + ++it; + } + } +} + +ExtSigSpec find_shared_operand(const OpMuxConn* seed, std::vector<const OpMuxConn *> &ports, const std::map<ExtSigSpec, std::set<RTLIL::Cell *>> &operand_to_users) +{ + std::set<RTLIL::Cell *> ops_using_operand; + std::set<RTLIL::Cell *> ops_set; + for(const auto& p: ports) + ops_set.insert(p->op); + + ExtSigSpec oper; + + auto op_a = seed->op; + + for (RTLIL::IdString port_name : {ID::A, ID::B}) { + oper = decode_port(op_a, port_name, &assign_map); + auto operand_users = operand_to_users.at(oper); + + if (operand_users.size() == 1) + continue; + + ops_using_operand.clear(); + for (auto mux_ops: ops_set) + if (operand_users.count(mux_ops)) + ops_using_operand.insert(mux_ops); + + if (ops_using_operand.size() > 1) { + ports.erase(std::remove_if(ports.begin(), ports.end(), [&](const OpMuxConn *p) { return !ops_using_operand.count(p->op); }), + ports.end()); + return oper; + } + } + + return ExtSigSpec(); +} + +dict<RTLIL::SigSpec, OpMuxConn> find_valid_op_mux_conns(RTLIL::Module *module, dict<RTLIL::SigBit, RTLIL::SigSpec> &op_outbit_to_outsig, + dict<RTLIL::SigSpec, RTLIL::Cell *> outsig_to_operator, + dict<RTLIL::SigBit, RTLIL::SigSpec> &op_aux_to_outsig) +{ + dict<RTLIL::SigSpec, int> op_outsig_user_track; + dict<RTLIL::SigSpec, OpMuxConn> op_mux_conn_map; + + std::function<void(RTLIL::SigSpec)> remove_outsig = [&](RTLIL::SigSpec outsig) { + for (auto op_outbit : outsig) + op_outbit_to_outsig.erase(op_outbit); + + if (op_mux_conn_map.count(outsig)) + op_mux_conn_map.erase(outsig); + }; + + std::function<void(RTLIL::SigBit)> remove_outsig_from_aux_bit = [&](RTLIL::SigBit auxbit) { + auto aux_outsig = op_aux_to_outsig.at(auxbit); + auto op = outsig_to_operator.at(aux_outsig); + auto op_outsig = assign_map(op->getPort(ID::Y)); + remove_outsig(op_outsig); + + for (auto aux_outbit : aux_outsig) + op_aux_to_outsig.erase(aux_outbit); + }; + + std::function<void(RTLIL::Cell *)> find_op_mux_conns = [&](RTLIL::Cell *mux) { + RTLIL::SigSpec sig; + int mux_port_size; + + if (mux->type.in(ID($mux), ID($_MUX_))) { + mux_port_size = mux->getPort(ID::A).size(); + sig = RTLIL::SigSpec{mux->getPort(ID::B), mux->getPort(ID::A)}; + } else { + mux_port_size = mux->getPort(ID::A).size(); + sig = mux->getPort(ID::B); + } + + auto mux_insig = assign_map(sig); + + for (int i = 0; i < mux_insig.size(); ++i) { + if (op_aux_to_outsig.count(mux_insig[i])) { + remove_outsig_from_aux_bit(mux_insig[i]); + continue; + } + + if (!op_outbit_to_outsig.count(mux_insig[i])) + continue; + + auto op_outsig = op_outbit_to_outsig.at(mux_insig[i]); + + if (op_mux_conn_map.count(op_outsig)) { + remove_outsig(op_outsig); + continue; + } + + int mux_port_id = i / mux_port_size; + int mux_port_offset = i % mux_port_size; + + int op_outsig_offset; + for (op_outsig_offset = 0; op_outsig[op_outsig_offset] != mux_insig[i]; ++op_outsig_offset) + ; + + int j = op_outsig_offset; + do { + if (!op_outbit_to_outsig.count(mux_insig[i])) + break; + + if (op_outbit_to_outsig.at(mux_insig[i]) != op_outsig) + break; + + ++i; + ++j; + } while ((i / mux_port_size == mux_port_id) && (j < op_outsig.size())); + + int op_conn_width = j - op_outsig_offset; + OpMuxConn inp = { + op_outsig.extract(op_outsig_offset, op_conn_width), + mux, + outsig_to_operator.at(op_outsig), + mux_port_id, + mux_port_offset, + op_outsig_offset, + }; + + op_mux_conn_map[op_outsig] = inp; + + --i; + } + }; + + std::function<void(RTLIL::SigSpec)> remove_connected_ops = [&](RTLIL::SigSpec sig) { + auto mux_insig = assign_map(sig); + for (auto outbit : mux_insig) { + if (op_aux_to_outsig.count(outbit)) { + remove_outsig_from_aux_bit(outbit); + continue; + } + + if (!op_outbit_to_outsig.count(outbit)) + continue; + + remove_outsig(op_outbit_to_outsig.at(outbit)); + } + }; + + for (auto cell : module->cells()) { + if (cell->type.in(ID($mux), ID($_MUX_), ID($pmux))) { + remove_connected_ops(cell->getPort(ID(S))); + find_op_mux_conns(cell); + } else { + for (auto &conn : cell->connections()) + if (cell->input(conn.first)) + remove_connected_ops(conn.second); + } + } + + for (auto w : module->wires()) { + if (!w->port_output) + continue; + + remove_connected_ops(w); + } + + return op_mux_conn_map; +} + +struct OptSharePass : public Pass { + OptSharePass() : Pass("opt_share", "merge mutually exclusive cells of the same type that share an input signal") {} + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" opt_share [selection]\n"); + log("\n"); + + log("This pass identifies mutually exclusive cells of the same type that:\n"); + log(" (a) share an input signal,\n"); + log(" (b) drive the same $mux, $_MUX_, or $pmux multiplexing cell,\n"); + log("\n"); + log("allowing the cell to be merged and the multiplexer to be moved from\n"); + log("multiplexing its output to multiplexing the non-shared input signals.\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + + log_header(design, "Executing OPT_SHARE pass.\n"); + + extra_args(args, 1, design); + for (auto module : design->selected_modules()) { + assign_map.clear(); + assign_map.set(module); + + std::map<ExtSigSpec, std::set<RTLIL::Cell *>> operand_to_users; + dict<RTLIL::SigSpec, RTLIL::Cell *> outsig_to_operator; + dict<RTLIL::SigBit, RTLIL::SigSpec> op_outbit_to_outsig; + dict<RTLIL::SigBit, RTLIL::SigSpec> op_aux_to_outsig; + bool any_shared_operands = false; + std::vector<ExtSigSpec> op_insigs; + + for (auto cell : module->cells()) { + if (!cell_supported(cell)) + continue; + + if (cell->type == ID($alu)) { + for (RTLIL::IdString port_name : {ID(X), ID(CO)}) { + auto mux_insig = assign_map(cell->getPort(port_name)); + outsig_to_operator[mux_insig] = cell; + for (auto outbit : mux_insig) + op_aux_to_outsig[outbit] = mux_insig; + } + } + + auto mux_insig = assign_map(cell->getPort(ID::Y)); + outsig_to_operator[mux_insig] = cell; + for (auto outbit : mux_insig) + op_outbit_to_outsig[outbit] = mux_insig; + + for (RTLIL::IdString port_name : {ID::A, ID::B}) { + auto op_insig = decode_port(cell, port_name, &assign_map); + op_insigs.push_back(op_insig); + operand_to_users[op_insig].insert(cell); + if (operand_to_users[op_insig].size() > 1) + any_shared_operands = true; + } + } + + if (!any_shared_operands) + continue; + + // Operator outputs need to be exclusively connected to the $mux inputs in order to be mergeable. Hence we count to + // how many points are operator output bits connected. + dict<RTLIL::SigSpec, OpMuxConn> op_mux_conn_map = + find_valid_op_mux_conns(module, op_outbit_to_outsig, outsig_to_operator, op_aux_to_outsig); + + // Group op connections connected to same ports of the same $mux. Sort them in ascending order of their port offset + dict<RTLIL::Cell*, std::vector<std::set<OpMuxConn>>> mux_port_op_conns; + for (auto& val: op_mux_conn_map) { + OpMuxConn p = val.second; + auto& mux_port_conns = mux_port_op_conns[p.mux]; + + if (mux_port_conns.size() == 0) { + int mux_port_num; + + if (p.mux->type.in(ID($mux), ID($_MUX_))) + mux_port_num = 2; + else + mux_port_num = p.mux->getPort(ID(S)).size(); + + mux_port_conns.resize(mux_port_num); + } + + mux_port_conns[p.mux_port_id].insert(p); + } + + std::vector<merged_op_t> merged_ops; + for (auto& val: mux_port_op_conns) { + + RTLIL::Cell* cell = val.first; + auto &mux_port_conns = val.second; + + const OpMuxConn *seed = NULL; + + // Look through the bits of the $mux inputs and see which of them are connected to the operator + // results. Operator results can be concatenated with other signals before led to the $mux. + while (true) { + + // Remove either the merged ports from the last iteration or the seed that failed to yield a merger + if (seed != NULL) { + mux_port_conns[seed->mux_port_id].erase(*seed); + seed = NULL; + } + + // For a new merger, find the seed op connection that starts at lowest port offset among port connections + for (auto &port_conns : mux_port_conns) { + if (!port_conns.size()) + continue; + + const OpMuxConn *next_p = &(*port_conns.begin()); + + if ((seed == NULL) || (seed->mux_port_offset > next_p->mux_port_offset)) + seed = next_p; + } + + // Cannot find the seed -> nothing to do for this $mux anymore + if (seed == NULL) + break; + + // Find all other op connections that start from the same port offset, and whose ops can be merged with the seed op + std::vector<const OpMuxConn *> mergeable_conns; + for (auto &port_conns : mux_port_conns) { + if (!port_conns.size()) + continue; + + const OpMuxConn *next_p = &(*port_conns.begin()); + + if ((next_p->op_outsig_offset == seed->op_outsig_offset) && + (next_p->mux_port_offset == seed->mux_port_offset) && mergeable(next_p->op, seed->op) && + next_p->sig.size() == seed->sig.size()) + mergeable_conns.push_back(next_p); + } + + // We need at least two mergeable connections for the merger + if (mergeable_conns.size() < 2) + continue; + + // Filter mergeable connections whose ops share an operand with seed connection's op + auto shared_operand = find_shared_operand(seed, mergeable_conns, operand_to_users); + + if (shared_operand.empty()) + continue; + + check_muxed_operands(mergeable_conns, shared_operand); + + if (mergeable_conns.size() < 2) + continue; + + // Remember the combination for the merger + std::vector<OpMuxConn> merged_ports; + for (auto p : mergeable_conns) { + merged_ports.push_back(*p); + mux_port_conns[p->mux_port_id].erase(*p); + } + + seed = NULL; + + merged_ops.push_back(merged_op_t{cell, merged_ports, shared_operand}); + + design->scratchpad_set_bool("opt.did_something", true); + } + + } + + for (auto &shared : merged_ops) { + log(" Found cells that share an operand and can be merged by moving the %s %s in front " + "of " + "them:\n", + log_id(shared.mux->type), log_id(shared.mux)); + for (const auto& op : shared.ports) + log(" %s\n", log_id(op.op)); + log("\n"); + + merge_operators(module, shared.mux, shared.ports, shared.shared_operand); + } + } + } + +} OptSharePass; + +PRIVATE_NAMESPACE_END diff --git a/passes/opt/pmux2shiftx.cc b/passes/opt/pmux2shiftx.cc new file mode 100644 index 000000000..92b5794ac --- /dev/null +++ b/passes/opt/pmux2shiftx.cc @@ -0,0 +1,860 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf <clifford@clifford.at> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/yosys.h" +#include "kernel/sigtools.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +struct OnehotDatabase +{ + Module *module; + const SigMap &sigmap; + bool verbose = false; + bool initialized = false; + + pool<SigBit> init_ones; + dict<SigSpec, pool<SigSpec>> sig_sources_db; + dict<SigSpec, bool> sig_onehot_cache; + pool<SigSpec> recursion_guard; + + OnehotDatabase(Module *module, const SigMap &sigmap) : module(module), sigmap(sigmap) + { + } + + void initialize() + { + log_assert(!initialized); + initialized = true; + + for (auto wire : module->wires()) + { + auto it = wire->attributes.find(ID(init)); + if (it == wire->attributes.end()) + continue; + + auto &val = it->second; + int width = std::max(GetSize(wire), GetSize(val)); + + for (int i = 0; i < width; i++) + if (val[i] == State::S1) + init_ones.insert(sigmap(SigBit(wire, i))); + } + + for (auto cell : module->cells()) + { + vector<SigSpec> inputs; + SigSpec output; + + if (cell->type.in(ID($adff), ID($dff), ID($dffe), ID($dlatch), ID($ff))) + { + output = cell->getPort(ID(Q)); + if (cell->type == ID($adff)) + inputs.push_back(cell->getParam(ID(ARST_VALUE))); + inputs.push_back(cell->getPort(ID(D))); + } + + if (cell->type.in(ID($mux), ID($pmux))) + { + output = cell->getPort(ID::Y); + inputs.push_back(cell->getPort(ID::A)); + SigSpec B = cell->getPort(ID::B); + for (int i = 0; i < GetSize(B); i += GetSize(output)) + inputs.push_back(B.extract(i, GetSize(output))); + } + + if (!output.empty()) + { + output = sigmap(output); + auto &srcs = sig_sources_db[output]; + for (auto src : inputs) { + while (!src.empty() && src[GetSize(src)-1] == State::S0) + src.remove(GetSize(src)-1); + srcs.insert(sigmap(src)); + } + } + } + } + + void query_worker(const SigSpec &sig, bool &retval, bool &cache, int indent) + { + if (verbose) + log("%*s %s\n", indent, "", log_signal(sig)); + log_assert(retval); + + if (recursion_guard.count(sig)) { + if (verbose) + log("%*s - recursion\n", indent, ""); + cache = false; + return; + } + + auto it = sig_onehot_cache.find(sig); + if (it != sig_onehot_cache.end()) { + if (verbose) + log("%*s - cached (%s)\n", indent, "", it->second ? "true" : "false"); + if (!it->second) + retval = false; + return; + } + + bool found_init_ones = false; + for (auto bit : sig) { + if (init_ones.count(bit)) { + if (found_init_ones) { + if (verbose) + log("%*s - non-onehot init value\n", indent, ""); + retval = false; + break; + } + found_init_ones = true; + } + } + + if (retval) + { + if (sig.is_fully_const()) + { + bool found_ones = false; + for (auto bit : sig) { + if (bit == State::S1) { + if (found_ones) { + if (verbose) + log("%*s - non-onehot constant\n", indent, ""); + retval = false; + break; + } + found_ones = true; + } + } + } + else + { + auto srcs = sig_sources_db.find(sig); + if (srcs == sig_sources_db.end()) { + if (verbose) + log("%*s - no sources for non-const signal\n", indent, ""); + retval = false; + } else { + for (auto &src : srcs->second) { + bool child_cache = true; + recursion_guard.insert(sig); + query_worker(src, retval, child_cache, indent+4); + recursion_guard.erase(sig); + if (!child_cache) + cache = false; + if (!retval) + break; + } + } + } + } + + // it is always safe to cache a negative result + if (cache || !retval) + sig_onehot_cache[sig] = retval; + } + + bool query(const SigSpec &sig) + { + bool retval = true; + bool cache = true; + + if (verbose) + log("** ONEHOT QUERY START (%s)\n", log_signal(sig)); + + if (!initialized) + initialize(); + + query_worker(sig, retval, cache, 3); + + if (verbose) + log("** ONEHOT QUERY RESULT = %s\n", retval ? "true" : "false"); + + // it is always safe to cache the root result of a query + if (!cache) + sig_onehot_cache[sig] = retval; + + return retval; + } +}; + +struct Pmux2ShiftxPass : public Pass { + Pmux2ShiftxPass() : Pass("pmux2shiftx", "transform $pmux cells to $shiftx cells") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" pmux2shiftx [options] [selection]\n"); + log("\n"); + log("This pass transforms $pmux cells to $shiftx cells.\n"); + log("\n"); + log(" -v, -vv\n"); + log(" verbose output\n"); + log("\n"); + log(" -min_density <percentage>\n"); + log(" specifies the minimum density for the shifter\n"); + log(" default: 50\n"); + log("\n"); + log(" -min_choices <int>\n"); + log(" specified the minimum number of choices for a control signal\n"); + log(" default: 3\n"); + log("\n"); + log(" -onehot ignore|pmux|shiftx\n"); + log(" select strategy for one-hot encoded control signals\n"); + log(" default: pmux\n"); + log("\n"); + log(" -norange\n"); + log(" disable $sub inference for \"range decoders\"\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + int min_density = 50; + int min_choices = 3; + bool allow_onehot = false; + bool optimize_onehot = true; + bool verbose = false; + bool verbose_onehot = false; + bool norange = false; + + log_header(design, "Executing PMUX2SHIFTX pass.\n"); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) { + if (args[argidx] == "-min_density" && argidx+1 < args.size()) { + min_density = atoi(args[++argidx].c_str()); + continue; + } + if (args[argidx] == "-min_choices" && argidx+1 < args.size()) { + min_choices = atoi(args[++argidx].c_str()); + continue; + } + if (args[argidx] == "-onehot" && argidx+1 < args.size() && args[argidx+1] == "ignore") { + argidx++; + allow_onehot = false; + optimize_onehot = false; + continue; + } + if (args[argidx] == "-onehot" && argidx+1 < args.size() && args[argidx+1] == "pmux") { + argidx++; + allow_onehot = false; + optimize_onehot = true; + continue; + } + if (args[argidx] == "-onehot" && argidx+1 < args.size() && args[argidx+1] == "shiftx") { + argidx++; + allow_onehot = true; + optimize_onehot = false; + continue; + } + if (args[argidx] == "-v") { + verbose = true; + continue; + } + if (args[argidx] == "-vv") { + verbose = true; + verbose_onehot = true; + continue; + } + if (args[argidx] == "-norange") { + norange = true; + continue; + } + break; + } + extra_args(args, argidx, design); + + for (auto module : design->selected_modules()) + { + SigMap sigmap(module); + OnehotDatabase onehot_db(module, sigmap); + onehot_db.verbose = verbose_onehot; + + dict<SigBit, pair<SigSpec, Const>> eqdb; + + for (auto cell : module->cells()) + { + if (cell->type == ID($eq)) + { + dict<SigBit, State> bits; + + SigSpec A = sigmap(cell->getPort(ID::A)); + SigSpec B = sigmap(cell->getPort(ID::B)); + + int a_width = cell->getParam(ID(A_WIDTH)).as_int(); + int b_width = cell->getParam(ID(B_WIDTH)).as_int(); + + if (a_width < b_width) { + bool a_signed = cell->getParam(ID(A_SIGNED)).as_int(); + A.extend_u0(b_width, a_signed); + } + + if (b_width < a_width) { + bool b_signed = cell->getParam(ID(B_SIGNED)).as_int(); + B.extend_u0(a_width, b_signed); + } + + for (int i = 0; i < GetSize(A); i++) { + SigBit a_bit = A[i], b_bit = B[i]; + if (b_bit.wire && !a_bit.wire) { + std::swap(a_bit, b_bit); + } + if (!a_bit.wire || b_bit.wire) + goto next_cell; + if (bits.count(a_bit)) + goto next_cell; + bits[a_bit] = b_bit.data; + } + + if (GetSize(bits) > 20) + goto next_cell; + + bits.sort(); + pair<SigSpec, Const> entry; + + for (auto it : bits) { + entry.first.append_bit(it.first); + entry.second.bits.push_back(it.second); + } + + eqdb[sigmap(cell->getPort(ID::Y)[0])] = entry; + goto next_cell; + } + + if (cell->type == ID($logic_not)) + { + dict<SigBit, State> bits; + + SigSpec A = sigmap(cell->getPort(ID::A)); + + for (int i = 0; i < GetSize(A); i++) + bits[A[i]] = State::S0; + + bits.sort(); + pair<SigSpec, Const> entry; + + for (auto it : bits) { + entry.first.append_bit(it.first); + entry.second.bits.push_back(it.second); + } + + eqdb[sigmap(cell->getPort(ID::Y)[0])] = entry; + goto next_cell; + } + next_cell:; + } + + for (auto cell : module->selected_cells()) + { + if (cell->type != ID($pmux)) + continue; + + string src = cell->get_src_attribute(); + int width = cell->getParam(ID(WIDTH)).as_int(); + int width_bits = ceil_log2(width); + int extwidth = width; + + while (extwidth & (extwidth-1)) + extwidth++; + + dict<SigSpec, pool<int>> seldb; + + SigSpec A = cell->getPort(ID::A); + SigSpec B = cell->getPort(ID::B); + SigSpec S = sigmap(cell->getPort(ID(S))); + for (int i = 0; i < GetSize(S); i++) + { + if (!eqdb.count(S[i])) + continue; + + auto &entry = eqdb.at(S[i]); + seldb[entry.first].insert(i); + } + + if (seldb.empty()) + continue; + + bool printed_pmux_header = false; + + if (verbose) { + printed_pmux_header = true; + log("Inspecting $pmux cell %s/%s.\n", log_id(module), log_id(cell)); + log(" data width: %d (next power-of-2 = %d, log2 = %d)\n", width, extwidth, width_bits); + } + + SigSpec updated_S = cell->getPort(ID(S)); + SigSpec updated_B = cell->getPort(ID::B); + + while (!seldb.empty()) + { + // pick the largest entry in seldb + SigSpec sig = seldb.begin()->first; + for (auto &it : seldb) { + if (GetSize(sig) < GetSize(it.first)) + sig = it.first; + else if (GetSize(seldb.at(sig)) < GetSize(it.second)) + sig = it.first; + } + + // find the relevant choices + bool is_onehot = GetSize(sig) > 2; + dict<Const, int> choices; + for (int i : seldb.at(sig)) { + Const val = eqdb.at(S[i]).second; + int onebits = 0; + for (auto b : val.bits) + if (b == State::S1) + onebits++; + if (onebits > 1) + is_onehot = false; + choices[val] = i; + } + + bool full_pmux = GetSize(choices) == GetSize(S); + + // TBD: also find choices that are using signals that are subsets of the bits in "sig" + + if (!verbose) + { + if (is_onehot && !allow_onehot && !optimize_onehot) { + seldb.erase(sig); + continue; + } + + if (GetSize(choices) < min_choices) { + seldb.erase(sig); + continue; + } + } + + if (!printed_pmux_header) { + printed_pmux_header = true; + log("Inspecting $pmux cell %s/%s.\n", log_id(module), log_id(cell)); + log(" data width: %d (next power-of-2 = %d, log2 = %d)\n", width, extwidth, width_bits); + } + + log(" checking ctrl signal %s\n", log_signal(sig)); + + auto print_choices = [&]() { + log(" table of choices:\n"); + for (auto &it : choices) + log(" %3d: %s: %s\n", it.second, log_signal(it.first), + log_signal(B.extract(it.second*width, width))); + }; + + if (verbose) + { + if (is_onehot && !allow_onehot && !optimize_onehot) { + print_choices(); + log(" ignoring one-hot encoding.\n"); + seldb.erase(sig); + continue; + } + + if (GetSize(choices) < min_choices) { + print_choices(); + log(" insufficient choices.\n"); + seldb.erase(sig); + continue; + } + } + + if (is_onehot && optimize_onehot) + { + print_choices(); + if (!onehot_db.query(sig)) + { + log(" failed to detect onehot driver. do not optimize.\n"); + } + else + { + log(" optimizing one-hot encoding.\n"); + for (auto &it : choices) + { + const Const &val = it.first; + int index = -1; + + for (int i = 0; i < GetSize(val); i++) + if (val[i] == State::S1) { + log_assert(index < 0); + index = i; + } + + if (index < 0) { + log(" %3d: zero encoding.\n", it.second); + continue; + } + + SigBit new_ctrl = sig[index]; + log(" %3d: new crtl signal is %s.\n", it.second, log_signal(new_ctrl)); + updated_S[it.second] = new_ctrl; + } + } + seldb.erase(sig); + continue; + } + + // find the best permutation + vector<int> perm_new_from_old(GetSize(sig)); + Const perm_xormask(State::S0, GetSize(sig)); + { + vector<int> values(GetSize(choices)); + vector<bool> used_src_columns(GetSize(sig)); + vector<vector<bool>> columns(GetSize(sig), vector<bool>(GetSize(values))); + + for (int i = 0; i < GetSize(choices); i++) { + Const val = choices.element(i)->first; + for (int k = 0; k < GetSize(val); k++) + if (val[k] == State::S1) + columns[k][i] = true; + } + + for (int dst_col = GetSize(sig)-1; dst_col >= 0; dst_col--) + { + int best_src_col = -1; + bool best_inv = false; + int best_maxval = 0; + int best_delta = 0; + + // find best src column for this dst column + for (int src_col = 0; src_col < GetSize(sig); src_col++) + { + if (used_src_columns[src_col]) + continue; + + int this_maxval = 0; + int this_minval = 1 << 30; + + int this_inv_maxval = 0; + int this_inv_minval = 1 << 30; + + for (int i = 0; i < GetSize(values); i++) + { + int val = values[i]; + int inv_val = val; + + if (columns[src_col][i]) + val |= 1 << dst_col; + else + inv_val |= 1 << dst_col; + + this_maxval = std::max(this_maxval, val); + this_minval = std::min(this_minval, val); + + this_inv_maxval = std::max(this_inv_maxval, inv_val); + this_inv_minval = std::min(this_inv_minval, inv_val); + } + + int this_delta = this_maxval - this_minval; + int this_inv_delta = this_maxval - this_minval; + bool this_inv = false; + + if (!norange && this_delta != this_inv_delta) + this_inv = this_inv_delta < this_delta; + else if (this_maxval != this_inv_maxval) + this_inv = this_inv_maxval < this_maxval; + + if (this_inv) { + this_delta = this_inv_delta; + this_maxval = this_inv_maxval; + this_minval = this_inv_minval; + } + + bool this_is_better = false; + + if (best_src_col < 0) + this_is_better = true; + else if (!norange && this_delta != best_delta) + this_is_better = this_delta < best_delta; + else if (this_maxval != best_maxval) + this_is_better = this_maxval < best_maxval; + else + this_is_better = sig[best_src_col] < sig[src_col]; + + if (this_is_better) { + best_src_col = src_col; + best_inv = this_inv; + best_maxval = this_maxval; + best_delta = this_delta; + } + } + + used_src_columns[best_src_col] = true; + perm_new_from_old[dst_col] = best_src_col; + perm_xormask[dst_col] = best_inv ? State::S1 : State::S0; + } + } + + // permutated sig + SigSpec perm_sig(State::S0, GetSize(sig)); + for (int i = 0; i < GetSize(sig); i++) + perm_sig[i] = sig[perm_new_from_old[i]]; + + log(" best permutation: %s\n", log_signal(perm_sig)); + log(" best xor mask: %s\n", log_signal(perm_xormask)); + + // permutated choices + int min_choice = 1 << 30; + int max_choice = -1; + dict<Const, int> perm_choices; + + for (auto &it : choices) + { + Const &old_c = it.first; + Const new_c(State::S0, GetSize(old_c)); + + for (int i = 0; i < GetSize(old_c); i++) + new_c[i] = old_c[perm_new_from_old[i]]; + + Const new_c_before_xor = new_c; + new_c = const_xor(new_c, perm_xormask, false, false, GetSize(new_c)); + + perm_choices[new_c] = it.second; + + min_choice = std::min(min_choice, new_c.as_int()); + max_choice = std::max(max_choice, new_c.as_int()); + + log(" %3d: %s -> %s -> %s: %s\n", it.second, log_signal(old_c), log_signal(new_c_before_xor), + log_signal(new_c), log_signal(B.extract(it.second*width, width))); + } + + int range_density = 100*GetSize(choices) / (max_choice-min_choice+1); + int absolute_density = 100*GetSize(choices) / (max_choice+1); + + log(" choices: %d\n", GetSize(choices)); + log(" min choice: %d\n", min_choice); + log(" max choice: %d\n", max_choice); + log(" range density: %d%%\n", range_density); + log(" absolute density: %d%%\n", absolute_density); + + if (full_pmux) { + int full_density = 100*GetSize(choices) / (1 << GetSize(sig)); + log(" full density: %d%%\n", full_density); + if (full_density < min_density) { + full_pmux = false; + } else { + min_choice = 0; + max_choice = (1 << GetSize(sig))-1; + log(" update to full case.\n"); + log(" new min choice: %d\n", min_choice); + log(" new max choice: %d\n", max_choice); + } + } + + bool full_case = (min_choice == 0) && (max_choice == (1 << GetSize(sig))-1) && (full_pmux || max_choice+1 == GetSize(choices)); + log(" full case: %s\n", full_case ? "true" : "false"); + + // check density percentages + Const offset(State::S0, GetSize(sig)); + if (!norange && absolute_density < min_density && range_density >= min_density) + { + offset = Const(min_choice, GetSize(sig)); + log(" offset: %s\n", log_signal(offset)); + + min_choice -= offset.as_int(); + max_choice -= offset.as_int(); + + dict<Const, int> new_perm_choices; + for (auto &it : perm_choices) + new_perm_choices[const_sub(it.first, offset, false, false, GetSize(sig))] = it.second; + perm_choices.swap(new_perm_choices); + } else + if (absolute_density < min_density) { + log(" insufficient density.\n"); + seldb.erase(sig); + continue; + } + + // creat cmp signal + SigSpec cmp = perm_sig; + if (perm_xormask.as_bool()) + cmp = module->Xor(NEW_ID, cmp, perm_xormask, false, src); + if (offset.as_bool()) + cmp = module->Sub(NEW_ID, cmp, offset, false, src); + + // create enable signal + SigBit en = State::S1; + if (!full_case) { + Const enable_mask(State::S0, max_choice+1); + for (auto &it : perm_choices) + enable_mask[it.first.as_int()] = State::S1; + en = module->addWire(NEW_ID); + module->addShift(NEW_ID, enable_mask, cmp, en, false, src); + } + + // create data signal + SigSpec data(State::Sx, (max_choice+1)*extwidth); + if (full_pmux) { + for (int i = 0; i <= max_choice; i++) + data.replace(i*extwidth, A); + } + for (auto &it : perm_choices) { + int position = it.first.as_int()*extwidth; + int data_index = it.second; + data.replace(position, B.extract(data_index*width, width)); + updated_S[data_index] = State::S0; + updated_B.replace(data_index*width, SigSpec(State::Sx, width)); + } + + // create shiftx cell + SigSpec shifted_cmp = {cmp, SigSpec(State::S0, width_bits)}; + SigSpec outsig = module->addWire(NEW_ID, width); + Cell *c = module->addShiftx(NEW_ID, data, shifted_cmp, outsig, false, src); + updated_S.append(en); + updated_B.append(outsig); + log(" created $shiftx cell %s.\n", log_id(c)); + + // remove this sig and continue with the next block + seldb.erase(sig); + } + + // update $pmux cell + cell->setPort(ID(S), updated_S); + cell->setPort(ID::B, updated_B); + cell->setParam(ID(S_WIDTH), GetSize(updated_S)); + } + } + } +} Pmux2ShiftxPass; + +struct OnehotPass : public Pass { + OnehotPass() : Pass("onehot", "optimize $eq cells for onehot signals") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" onehot [options] [selection]\n"); + log("\n"); + log("This pass optimizes $eq cells that compare one-hot signals against constants\n"); + log("\n"); + log(" -v, -vv\n"); + log(" verbose output\n"); + log("\n"); + } + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE + { + bool verbose = false; + bool verbose_onehot = false; + + log_header(design, "Executing ONEHOT pass.\n"); + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) { + if (args[argidx] == "-v") { + verbose = true; + continue; + } + if (args[argidx] == "-vv") { + verbose = true; + verbose_onehot = true; + continue; + } + break; + } + extra_args(args, argidx, design); + + for (auto module : design->selected_modules()) + { + SigMap sigmap(module); + OnehotDatabase onehot_db(module, sigmap); + onehot_db.verbose = verbose_onehot; + + for (auto cell : module->selected_cells()) + { + if (cell->type != ID($eq)) + continue; + + SigSpec A = sigmap(cell->getPort(ID::A)); + SigSpec B = sigmap(cell->getPort(ID::B)); + + int a_width = cell->getParam(ID(A_WIDTH)).as_int(); + int b_width = cell->getParam(ID(B_WIDTH)).as_int(); + + if (a_width < b_width) { + bool a_signed = cell->getParam(ID(A_SIGNED)).as_int(); + A.extend_u0(b_width, a_signed); + } + + if (b_width < a_width) { + bool b_signed = cell->getParam(ID(B_SIGNED)).as_int(); + B.extend_u0(a_width, b_signed); + } + + if (A.is_fully_const()) + std::swap(A, B); + + if (!B.is_fully_const()) + continue; + + if (verbose) + log("Checking $eq(%s, %s) cell %s/%s.\n", log_signal(A), log_signal(B), log_id(module), log_id(cell)); + + if (!onehot_db.query(A)) { + if (verbose) + log(" onehot driver test on %s failed.\n", log_signal(A)); + continue; + } + + int index = -1; + bool not_onehot = false; + + for (int i = 0; i < GetSize(B); i++) { + if (B[i] != State::S1) + continue; + if (index >= 0) + not_onehot = true; + index = i; + } + + if (index < 0) { + if (verbose) + log(" not optimizing the zero pattern.\n"); + continue; + } + + SigSpec Y = cell->getPort(ID::Y); + + if (not_onehot) + { + if (verbose) + log(" replacing with constant 0 driver.\n"); + else + log("Replacing one-hot $eq(%s, %s) cell %s/%s with constant 0 driver.\n", log_signal(A), log_signal(B), log_id(module), log_id(cell)); + module->connect(Y, SigSpec(1, GetSize(Y))); + } + else + { + SigSpec sig = A[index]; + if (verbose) + log(" replacing with signal %s.\n", log_signal(sig)); + else + log("Replacing one-hot $eq(%s, %s) cell %s/%s with signal %s.\n",log_signal(A), log_signal(B), log_id(module), log_id(cell), log_signal(sig)); + sig.extend_u0(GetSize(Y)); + module->connect(Y, sig); + } + + module->remove(cell); + } + } + } +} OnehotPass; + +PRIVATE_NAMESPACE_END diff --git a/passes/opt/rmports.cc b/passes/opt/rmports.cc index 756be7473..32363dd68 100644 --- a/passes/opt/rmports.cc +++ b/passes/opt/rmports.cc @@ -28,7 +28,7 @@ PRIVATE_NAMESPACE_BEGIN struct RmportsPassPass : public Pass { RmportsPassPass() : Pass("rmports", "remove module ports with no connections") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -39,7 +39,7 @@ struct RmportsPassPass : public Pass { log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { log_header(design, "Executing RMPORTS pass (remove ports with no connections).\n"); @@ -171,7 +171,7 @@ struct RmportsPassPass : public Pass { wire->port_output = false; wire->port_id = 0; } - log("Removed %zu unused ports.\n", unused_ports.size()); + log("Removed %d unused ports.\n", GetSize(unused_ports)); // Re-number all of the wires that DO have ports still on them for(size_t i=0; i<module->ports.size(); i++) diff --git a/passes/opt/share.cc b/passes/opt/share.cc index 22914eaa7..92ce3fd11 100644 --- a/passes/opt/share.cc +++ b/passes/opt/share.cc @@ -89,8 +89,8 @@ struct ShareWorker queue_bits.clear(); for (auto &pbit : portbits) { - if (pbit.cell->type == "$mux" || pbit.cell->type == "$pmux") { - pool<RTLIL::SigBit> bits = modwalker.sigmap(pbit.cell->getPort("\\S")).to_sigbit_pool(); + if (pbit.cell->type == ID($mux) || pbit.cell->type == ID($pmux)) { + pool<RTLIL::SigBit> bits = modwalker.sigmap(pbit.cell->getPort(ID(S))).to_sigbit_pool(); terminal_bits.insert(bits.begin(), bits.end()); queue_bits.insert(bits.begin(), bits.end()); visited_cells.insert(pbit.cell); @@ -128,7 +128,7 @@ struct ShareWorker static int bits_macc(RTLIL::Cell *c) { Macc m(c); - int width = GetSize(c->getPort("\\Y")); + int width = GetSize(c->getPort(ID::Y)); return bits_macc(m, width); } @@ -242,7 +242,7 @@ struct ShareWorker { Macc m1(c1), m2(c2), supermacc; - int w1 = GetSize(c1->getPort("\\Y")), w2 = GetSize(c2->getPort("\\Y")); + int w1 = GetSize(c1->getPort(ID::Y)), w2 = GetSize(c2->getPort(ID::Y)); int width = max(w1, w2); m1.optimize(w1); @@ -328,11 +328,11 @@ struct ShareWorker { RTLIL::SigSpec sig_y = module->addWire(NEW_ID, width); - supercell_aux->insert(module->addPos(NEW_ID, sig_y, c1->getPort("\\Y"))); - supercell_aux->insert(module->addPos(NEW_ID, sig_y, c2->getPort("\\Y"))); + supercell_aux->insert(module->addPos(NEW_ID, sig_y, c1->getPort(ID::Y))); + supercell_aux->insert(module->addPos(NEW_ID, sig_y, c2->getPort(ID::Y))); - supercell->setParam("\\Y_WIDTH", width); - supercell->setPort("\\Y", sig_y); + supercell->setParam(ID(Y_WIDTH), width); + supercell->setPort(ID::Y, sig_y); supermacc.optimize(width); supermacc.to_cell(supercell); @@ -368,22 +368,22 @@ struct ShareWorker continue; } - if (cell->type == "$memrd") { - if (cell->parameters.at("\\CLK_ENABLE").as_bool()) + if (cell->type == ID($memrd)) { + if (cell->parameters.at(ID(CLK_ENABLE)).as_bool()) continue; - if (config.opt_aggressive || !modwalker.sigmap(cell->getPort("\\ADDR")).is_fully_const()) + if (config.opt_aggressive || !modwalker.sigmap(cell->getPort(ID(ADDR))).is_fully_const()) shareable_cells.insert(cell); continue; } - if (cell->type == "$mul" || cell->type == "$div" || cell->type == "$mod") { - if (config.opt_aggressive || cell->parameters.at("\\Y_WIDTH").as_int() >= 4) + if (cell->type.in(ID($mul), ID($div), ID($mod))) { + if (config.opt_aggressive || cell->parameters.at(ID(Y_WIDTH)).as_int() >= 4) shareable_cells.insert(cell); continue; } - if (cell->type == "$shl" || cell->type == "$shr" || cell->type == "$sshl" || cell->type == "$sshr") { - if (config.opt_aggressive || cell->parameters.at("\\Y_WIDTH").as_int() >= 8) + if (cell->type.in(ID($shl), ID($shr), ID($sshl), ID($sshr))) { + if (config.opt_aggressive || cell->parameters.at(ID(Y_WIDTH)).as_int() >= 8) shareable_cells.insert(cell); continue; } @@ -401,9 +401,9 @@ struct ShareWorker if (c1->type != c2->type) return false; - if (c1->type == "$memrd") + if (c1->type == ID($memrd)) { - if (c1->parameters.at("\\MEMID").decode_string() != c2->parameters.at("\\MEMID").decode_string()) + if (c1->parameters.at(ID(MEMID)).decode_string() != c2->parameters.at(ID(MEMID)).decode_string()) return false; return true; @@ -413,11 +413,11 @@ struct ShareWorker { if (!config.opt_aggressive) { - int a1_width = c1->parameters.at("\\A_WIDTH").as_int(); - int y1_width = c1->parameters.at("\\Y_WIDTH").as_int(); + int a1_width = c1->parameters.at(ID(A_WIDTH)).as_int(); + int y1_width = c1->parameters.at(ID(Y_WIDTH)).as_int(); - int a2_width = c2->parameters.at("\\A_WIDTH").as_int(); - int y2_width = c2->parameters.at("\\Y_WIDTH").as_int(); + int a2_width = c2->parameters.at(ID(A_WIDTH)).as_int(); + int y2_width = c2->parameters.at(ID(Y_WIDTH)).as_int(); if (max(a1_width, a2_width) > 2 * min(a1_width, a2_width)) return false; if (max(y1_width, y2_width) > 2 * min(y1_width, y2_width)) return false; @@ -426,17 +426,17 @@ struct ShareWorker return true; } - if (config.generic_bin_ops.count(c1->type) || c1->type == "$alu") + if (config.generic_bin_ops.count(c1->type) || c1->type == ID($alu)) { if (!config.opt_aggressive) { - int a1_width = c1->parameters.at("\\A_WIDTH").as_int(); - int b1_width = c1->parameters.at("\\B_WIDTH").as_int(); - int y1_width = c1->parameters.at("\\Y_WIDTH").as_int(); + int a1_width = c1->parameters.at(ID(A_WIDTH)).as_int(); + int b1_width = c1->parameters.at(ID(B_WIDTH)).as_int(); + int y1_width = c1->parameters.at(ID(Y_WIDTH)).as_int(); - int a2_width = c2->parameters.at("\\A_WIDTH").as_int(); - int b2_width = c2->parameters.at("\\B_WIDTH").as_int(); - int y2_width = c2->parameters.at("\\Y_WIDTH").as_int(); + int a2_width = c2->parameters.at(ID(A_WIDTH)).as_int(); + int b2_width = c2->parameters.at(ID(B_WIDTH)).as_int(); + int y2_width = c2->parameters.at(ID(Y_WIDTH)).as_int(); if (max(a1_width, a2_width) > 2 * min(a1_width, a2_width)) return false; if (max(b1_width, b2_width) > 2 * min(b1_width, b2_width)) return false; @@ -450,13 +450,13 @@ struct ShareWorker { if (!config.opt_aggressive) { - int a1_width = c1->parameters.at("\\A_WIDTH").as_int(); - int b1_width = c1->parameters.at("\\B_WIDTH").as_int(); - int y1_width = c1->parameters.at("\\Y_WIDTH").as_int(); + int a1_width = c1->parameters.at(ID(A_WIDTH)).as_int(); + int b1_width = c1->parameters.at(ID(B_WIDTH)).as_int(); + int y1_width = c1->parameters.at(ID(Y_WIDTH)).as_int(); - int a2_width = c2->parameters.at("\\A_WIDTH").as_int(); - int b2_width = c2->parameters.at("\\B_WIDTH").as_int(); - int y2_width = c2->parameters.at("\\Y_WIDTH").as_int(); + int a2_width = c2->parameters.at(ID(A_WIDTH)).as_int(); + int b2_width = c2->parameters.at(ID(B_WIDTH)).as_int(); + int y2_width = c2->parameters.at(ID(Y_WIDTH)).as_int(); int min1_width = min(a1_width, b1_width); int max1_width = max(a1_width, b1_width); @@ -472,7 +472,7 @@ struct ShareWorker return true; } - if (c1->type == "$macc") + if (c1->type == ID($macc)) { if (!config.opt_aggressive) if (share_macc(c1, c2) > 2 * min(bits_macc(c1), bits_macc(c2))) return false; @@ -510,27 +510,27 @@ struct ShareWorker if (config.generic_uni_ops.count(c1->type)) { - if (c1->parameters.at("\\A_SIGNED").as_bool() != c2->parameters.at("\\A_SIGNED").as_bool()) + if (c1->parameters.at(ID(A_SIGNED)).as_bool() != c2->parameters.at(ID(A_SIGNED)).as_bool()) { - RTLIL::Cell *unsigned_cell = c1->parameters.at("\\A_SIGNED").as_bool() ? c2 : c1; - if (unsigned_cell->getPort("\\A").to_sigbit_vector().back() != RTLIL::State::S0) { - unsigned_cell->parameters.at("\\A_WIDTH") = unsigned_cell->parameters.at("\\A_WIDTH").as_int() + 1; - RTLIL::SigSpec new_a = unsigned_cell->getPort("\\A"); + RTLIL::Cell *unsigned_cell = c1->parameters.at(ID(A_SIGNED)).as_bool() ? c2 : c1; + if (unsigned_cell->getPort(ID::A).to_sigbit_vector().back() != RTLIL::State::S0) { + unsigned_cell->parameters.at(ID(A_WIDTH)) = unsigned_cell->parameters.at(ID(A_WIDTH)).as_int() + 1; + RTLIL::SigSpec new_a = unsigned_cell->getPort(ID::A); new_a.append_bit(RTLIL::State::S0); - unsigned_cell->setPort("\\A", new_a); + unsigned_cell->setPort(ID::A, new_a); } - unsigned_cell->parameters.at("\\A_SIGNED") = true; + unsigned_cell->parameters.at(ID(A_SIGNED)) = true; unsigned_cell->check(); } - bool a_signed = c1->parameters.at("\\A_SIGNED").as_bool(); - log_assert(a_signed == c2->parameters.at("\\A_SIGNED").as_bool()); + bool a_signed = c1->parameters.at(ID(A_SIGNED)).as_bool(); + log_assert(a_signed == c2->parameters.at(ID(A_SIGNED)).as_bool()); - RTLIL::SigSpec a1 = c1->getPort("\\A"); - RTLIL::SigSpec y1 = c1->getPort("\\Y"); + RTLIL::SigSpec a1 = c1->getPort(ID::A); + RTLIL::SigSpec y1 = c1->getPort(ID::Y); - RTLIL::SigSpec a2 = c2->getPort("\\A"); - RTLIL::SigSpec y2 = c2->getPort("\\Y"); + RTLIL::SigSpec a2 = c2->getPort(ID::A); + RTLIL::SigSpec y2 = c2->getPort(ID::Y); int a_width = max(a1.size(), a2.size()); int y_width = max(y1.size(), y2.size()); @@ -544,11 +544,11 @@ struct ShareWorker RTLIL::Wire *y = module->addWire(NEW_ID, y_width); RTLIL::Cell *supercell = module->addCell(NEW_ID, c1->type); - supercell->parameters["\\A_SIGNED"] = a_signed; - supercell->parameters["\\A_WIDTH"] = a_width; - supercell->parameters["\\Y_WIDTH"] = y_width; - supercell->setPort("\\A", a); - supercell->setPort("\\Y", y); + supercell->parameters[ID(A_SIGNED)] = a_signed; + supercell->parameters[ID(A_WIDTH)] = a_width; + supercell->parameters[ID(Y_WIDTH)] = y_width; + supercell->setPort(ID::A, a); + supercell->setPort(ID::Y, y); supercell_aux.insert(module->addPos(NEW_ID, y, y1)); supercell_aux.insert(module->addPos(NEW_ID, y, y2)); @@ -557,54 +557,54 @@ struct ShareWorker return supercell; } - if (config.generic_bin_ops.count(c1->type) || config.generic_cbin_ops.count(c1->type) || c1->type == "$alu") + if (config.generic_bin_ops.count(c1->type) || config.generic_cbin_ops.count(c1->type) || c1->type == ID($alu)) { bool modified_src_cells = false; if (config.generic_cbin_ops.count(c1->type)) { - int score_unflipped = max(c1->parameters.at("\\A_WIDTH").as_int(), c2->parameters.at("\\A_WIDTH").as_int()) + - max(c1->parameters.at("\\B_WIDTH").as_int(), c2->parameters.at("\\B_WIDTH").as_int()); + int score_unflipped = max(c1->parameters.at(ID(A_WIDTH)).as_int(), c2->parameters.at(ID(A_WIDTH)).as_int()) + + max(c1->parameters.at(ID(B_WIDTH)).as_int(), c2->parameters.at(ID(B_WIDTH)).as_int()); - int score_flipped = max(c1->parameters.at("\\A_WIDTH").as_int(), c2->parameters.at("\\B_WIDTH").as_int()) + - max(c1->parameters.at("\\B_WIDTH").as_int(), c2->parameters.at("\\A_WIDTH").as_int()); + int score_flipped = max(c1->parameters.at(ID(A_WIDTH)).as_int(), c2->parameters.at(ID(B_WIDTH)).as_int()) + + max(c1->parameters.at(ID(B_WIDTH)).as_int(), c2->parameters.at(ID(A_WIDTH)).as_int()); if (score_flipped < score_unflipped) { - RTLIL::SigSpec tmp = c2->getPort("\\A"); - c2->setPort("\\A", c2->getPort("\\B")); - c2->setPort("\\B", tmp); + RTLIL::SigSpec tmp = c2->getPort(ID::A); + c2->setPort(ID::A, c2->getPort(ID::B)); + c2->setPort(ID::B, tmp); - std::swap(c2->parameters.at("\\A_WIDTH"), c2->parameters.at("\\B_WIDTH")); - std::swap(c2->parameters.at("\\A_SIGNED"), c2->parameters.at("\\B_SIGNED")); + std::swap(c2->parameters.at(ID(A_WIDTH)), c2->parameters.at(ID(B_WIDTH))); + std::swap(c2->parameters.at(ID(A_SIGNED)), c2->parameters.at(ID(B_SIGNED))); modified_src_cells = true; } } - if (c1->parameters.at("\\A_SIGNED").as_bool() != c2->parameters.at("\\A_SIGNED").as_bool()) + if (c1->parameters.at(ID(A_SIGNED)).as_bool() != c2->parameters.at(ID(A_SIGNED)).as_bool()) { - RTLIL::Cell *unsigned_cell = c1->parameters.at("\\A_SIGNED").as_bool() ? c2 : c1; - if (unsigned_cell->getPort("\\A").to_sigbit_vector().back() != RTLIL::State::S0) { - unsigned_cell->parameters.at("\\A_WIDTH") = unsigned_cell->parameters.at("\\A_WIDTH").as_int() + 1; - RTLIL::SigSpec new_a = unsigned_cell->getPort("\\A"); + RTLIL::Cell *unsigned_cell = c1->parameters.at(ID(A_SIGNED)).as_bool() ? c2 : c1; + if (unsigned_cell->getPort(ID::A).to_sigbit_vector().back() != RTLIL::State::S0) { + unsigned_cell->parameters.at(ID(A_WIDTH)) = unsigned_cell->parameters.at(ID(A_WIDTH)).as_int() + 1; + RTLIL::SigSpec new_a = unsigned_cell->getPort(ID::A); new_a.append_bit(RTLIL::State::S0); - unsigned_cell->setPort("\\A", new_a); + unsigned_cell->setPort(ID::A, new_a); } - unsigned_cell->parameters.at("\\A_SIGNED") = true; + unsigned_cell->parameters.at(ID(A_SIGNED)) = true; modified_src_cells = true; } - if (c1->parameters.at("\\B_SIGNED").as_bool() != c2->parameters.at("\\B_SIGNED").as_bool()) + if (c1->parameters.at(ID(B_SIGNED)).as_bool() != c2->parameters.at(ID(B_SIGNED)).as_bool()) { - RTLIL::Cell *unsigned_cell = c1->parameters.at("\\B_SIGNED").as_bool() ? c2 : c1; - if (unsigned_cell->getPort("\\B").to_sigbit_vector().back() != RTLIL::State::S0) { - unsigned_cell->parameters.at("\\B_WIDTH") = unsigned_cell->parameters.at("\\B_WIDTH").as_int() + 1; - RTLIL::SigSpec new_b = unsigned_cell->getPort("\\B"); + RTLIL::Cell *unsigned_cell = c1->parameters.at(ID(B_SIGNED)).as_bool() ? c2 : c1; + if (unsigned_cell->getPort(ID::B).to_sigbit_vector().back() != RTLIL::State::S0) { + unsigned_cell->parameters.at(ID(B_WIDTH)) = unsigned_cell->parameters.at(ID(B_WIDTH)).as_int() + 1; + RTLIL::SigSpec new_b = unsigned_cell->getPort(ID::B); new_b.append_bit(RTLIL::State::S0); - unsigned_cell->setPort("\\B", new_b); + unsigned_cell->setPort(ID::B, new_b); } - unsigned_cell->parameters.at("\\B_SIGNED") = true; + unsigned_cell->parameters.at(ID(B_SIGNED)) = true; modified_src_cells = true; } @@ -613,28 +613,28 @@ struct ShareWorker c2->check(); } - bool a_signed = c1->parameters.at("\\A_SIGNED").as_bool(); - bool b_signed = c1->parameters.at("\\B_SIGNED").as_bool(); + bool a_signed = c1->parameters.at(ID(A_SIGNED)).as_bool(); + bool b_signed = c1->parameters.at(ID(B_SIGNED)).as_bool(); - log_assert(a_signed == c2->parameters.at("\\A_SIGNED").as_bool()); - log_assert(b_signed == c2->parameters.at("\\B_SIGNED").as_bool()); + log_assert(a_signed == c2->parameters.at(ID(A_SIGNED)).as_bool()); + log_assert(b_signed == c2->parameters.at(ID(B_SIGNED)).as_bool()); - if (c1->type == "$shl" || c1->type == "$shr" || c1->type == "$sshl" || c1->type == "$sshr") + if (c1->type == ID($shl) || c1->type == ID($shr) || c1->type == ID($sshl) || c1->type == ID($sshr)) b_signed = false; - RTLIL::SigSpec a1 = c1->getPort("\\A"); - RTLIL::SigSpec b1 = c1->getPort("\\B"); - RTLIL::SigSpec y1 = c1->getPort("\\Y"); + RTLIL::SigSpec a1 = c1->getPort(ID::A); + RTLIL::SigSpec b1 = c1->getPort(ID::B); + RTLIL::SigSpec y1 = c1->getPort(ID::Y); - RTLIL::SigSpec a2 = c2->getPort("\\A"); - RTLIL::SigSpec b2 = c2->getPort("\\B"); - RTLIL::SigSpec y2 = c2->getPort("\\Y"); + RTLIL::SigSpec a2 = c2->getPort(ID::A); + RTLIL::SigSpec b2 = c2->getPort(ID::B); + RTLIL::SigSpec y2 = c2->getPort(ID::Y); int a_width = max(a1.size(), a2.size()); int b_width = max(b1.size(), b2.size()); int y_width = max(y1.size(), y2.size()); - if (c1->type == "$shr" && a_signed) + if (c1->type == ID($shr) && a_signed) { a_width = max(y_width, a_width); @@ -660,43 +660,43 @@ struct ShareWorker supercell_aux.insert(module->addMux(NEW_ID, b2, b1, act, b)); RTLIL::Wire *y = module->addWire(NEW_ID, y_width); - RTLIL::Wire *x = c1->type == "$alu" ? module->addWire(NEW_ID, y_width) : nullptr; - RTLIL::Wire *co = c1->type == "$alu" ? module->addWire(NEW_ID, y_width) : nullptr; + RTLIL::Wire *x = c1->type == ID($alu) ? module->addWire(NEW_ID, y_width) : nullptr; + RTLIL::Wire *co = c1->type == ID($alu) ? module->addWire(NEW_ID, y_width) : nullptr; RTLIL::Cell *supercell = module->addCell(NEW_ID, c1->type); - supercell->parameters["\\A_SIGNED"] = a_signed; - supercell->parameters["\\B_SIGNED"] = b_signed; - supercell->parameters["\\A_WIDTH"] = a_width; - supercell->parameters["\\B_WIDTH"] = b_width; - supercell->parameters["\\Y_WIDTH"] = y_width; - supercell->setPort("\\A", a); - supercell->setPort("\\B", b); - supercell->setPort("\\Y", y); - if (c1->type == "$alu") { + supercell->parameters[ID(A_SIGNED)] = a_signed; + supercell->parameters[ID(B_SIGNED)] = b_signed; + supercell->parameters[ID(A_WIDTH)] = a_width; + supercell->parameters[ID(B_WIDTH)] = b_width; + supercell->parameters[ID(Y_WIDTH)] = y_width; + supercell->setPort(ID::A, a); + supercell->setPort(ID::B, b); + supercell->setPort(ID::Y, y); + if (c1->type == ID($alu)) { RTLIL::Wire *ci = module->addWire(NEW_ID), *bi = module->addWire(NEW_ID); - supercell_aux.insert(module->addMux(NEW_ID, c2->getPort("\\CI"), c1->getPort("\\CI"), act, ci)); - supercell_aux.insert(module->addMux(NEW_ID, c2->getPort("\\BI"), c1->getPort("\\BI"), act, bi)); - supercell->setPort("\\CI", ci); - supercell->setPort("\\BI", bi); - supercell->setPort("\\CO", co); - supercell->setPort("\\X", x); + supercell_aux.insert(module->addMux(NEW_ID, c2->getPort(ID(CI)), c1->getPort(ID(CI)), act, ci)); + supercell_aux.insert(module->addMux(NEW_ID, c2->getPort(ID(BI)), c1->getPort(ID(BI)), act, bi)); + supercell->setPort(ID(CI), ci); + supercell->setPort(ID(BI), bi); + supercell->setPort(ID(CO), co); + supercell->setPort(ID(X), x); } supercell->check(); supercell_aux.insert(module->addPos(NEW_ID, y, y1)); supercell_aux.insert(module->addPos(NEW_ID, y, y2)); - if (c1->type == "$alu") { - supercell_aux.insert(module->addPos(NEW_ID, co, c1->getPort("\\CO"))); - supercell_aux.insert(module->addPos(NEW_ID, co, c2->getPort("\\CO"))); - supercell_aux.insert(module->addPos(NEW_ID, x, c1->getPort("\\X"))); - supercell_aux.insert(module->addPos(NEW_ID, x, c2->getPort("\\X"))); + if (c1->type == ID($alu)) { + supercell_aux.insert(module->addPos(NEW_ID, co, c1->getPort(ID(CO)))); + supercell_aux.insert(module->addPos(NEW_ID, co, c2->getPort(ID(CO)))); + supercell_aux.insert(module->addPos(NEW_ID, x, c1->getPort(ID(X)))); + supercell_aux.insert(module->addPos(NEW_ID, x, c2->getPort(ID(X)))); } supercell_aux.insert(supercell); return supercell; } - if (c1->type == "$macc") + if (c1->type == ID($macc)) { RTLIL::Cell *supercell = module->addCell(NEW_ID, c1->type); supercell_aux.insert(supercell); @@ -705,14 +705,18 @@ struct ShareWorker return supercell; } - if (c1->type == "$memrd") + if (c1->type == ID($memrd)) { RTLIL::Cell *supercell = module->addCell(NEW_ID, c1); - RTLIL::SigSpec addr1 = c1->getPort("\\ADDR"); - RTLIL::SigSpec addr2 = c2->getPort("\\ADDR"); - if (addr1 != addr2) - supercell->setPort("\\ADDR", module->Mux(NEW_ID, addr2, addr1, act)); - supercell_aux.insert(module->addPos(NEW_ID, supercell->getPort("\\DATA"), c2->getPort("\\DATA"))); + RTLIL::SigSpec addr1 = c1->getPort(ID(ADDR)); + RTLIL::SigSpec addr2 = c2->getPort(ID(ADDR)); + if (GetSize(addr1) < GetSize(addr2)) + addr1.extend_u0(GetSize(addr2)); + else + addr2.extend_u0(GetSize(addr1)); + supercell->setPort(ID(ADDR), addr1 != addr2 ? module->Mux(NEW_ID, addr2, addr1, act) : addr1); + supercell->parameters[ID(ABITS)] = RTLIL::Const(GetSize(addr1)); + supercell_aux.insert(module->addPos(NEW_ID, supercell->getPort(ID(DATA)), c2->getPort(ID(DATA)))); supercell_aux.insert(supercell); return supercell; } @@ -743,8 +747,8 @@ struct ShareWorker modwalker.get_consumers(pbits, modwalker.cell_outputs[cell]); for (auto &bit : pbits) { - if ((bit.cell->type == "$mux" || bit.cell->type == "$pmux") && bit.port == "\\S") - forbidden_controls_cache[cell].insert(bit.cell->getPort("\\S").extract(bit.offset, 1)); + if ((bit.cell->type == ID($mux) || bit.cell->type == ID($pmux)) && bit.port == ID(S)) + forbidden_controls_cache[cell].insert(bit.cell->getPort(ID(S)).extract(bit.offset, 1)); consumer_cells.insert(bit.cell); } @@ -870,7 +874,7 @@ struct ShareWorker } for (auto &pbit : modwalker.signal_consumers[bit]) { log_assert(fwd_ct.cell_known(pbit.cell->type)); - if ((pbit.cell->type == "$mux" || pbit.cell->type == "$pmux") && (pbit.port == "\\A" || pbit.port == "\\B")) + if ((pbit.cell->type == ID($mux) || pbit.cell->type == ID($pmux)) && (pbit.port == ID::A || pbit.port == ID::B)) driven_data_muxes.insert(pbit.cell); else driven_cells.insert(pbit.cell); @@ -886,10 +890,10 @@ struct ShareWorker bool used_in_a = false; std::set<int> used_in_b_parts; - int width = c->parameters.at("\\WIDTH").as_int(); - std::vector<RTLIL::SigBit> sig_a = modwalker.sigmap(c->getPort("\\A")); - std::vector<RTLIL::SigBit> sig_b = modwalker.sigmap(c->getPort("\\B")); - std::vector<RTLIL::SigBit> sig_s = modwalker.sigmap(c->getPort("\\S")); + int width = c->parameters.at(ID(WIDTH)).as_int(); + std::vector<RTLIL::SigBit> sig_a = modwalker.sigmap(c->getPort(ID::A)); + std::vector<RTLIL::SigBit> sig_b = modwalker.sigmap(c->getPort(ID::B)); + std::vector<RTLIL::SigBit> sig_s = modwalker.sigmap(c->getPort(ID(S))); for (auto &bit : sig_a) if (cell_out_bits.count(bit)) @@ -1128,14 +1132,14 @@ struct ShareWorker fwd_ct.setup_internals(); cone_ct.setup_internals(); - cone_ct.cell_types.erase("$mul"); - cone_ct.cell_types.erase("$mod"); - cone_ct.cell_types.erase("$div"); - cone_ct.cell_types.erase("$pow"); - cone_ct.cell_types.erase("$shl"); - cone_ct.cell_types.erase("$shr"); - cone_ct.cell_types.erase("$sshl"); - cone_ct.cell_types.erase("$sshr"); + cone_ct.cell_types.erase(ID($mul)); + cone_ct.cell_types.erase(ID($mod)); + cone_ct.cell_types.erase(ID($div)); + cone_ct.cell_types.erase(ID($pow)); + cone_ct.cell_types.erase(ID($shl)); + cone_ct.cell_types.erase(ID($shr)); + cone_ct.cell_types.erase(ID($sshl)); + cone_ct.cell_types.erase(ID($sshr)); modwalker.setup(design, module); @@ -1149,9 +1153,9 @@ struct ShareWorker GetSize(shareable_cells), log_id(module)); for (auto cell : module->cells()) - if (cell->type == "$pmux") - for (auto bit : cell->getPort("\\S")) - for (auto other_bit : cell->getPort("\\S")) + if (cell->type == ID($pmux)) + for (auto bit : cell->getPort(ID(S))) + for (auto other_bit : cell->getPort(ID(S))) if (bit < other_bit) exclusive_ctrls.push_back(std::pair<RTLIL::SigBit, RTLIL::SigBit>(bit, other_bit)); @@ -1421,7 +1425,7 @@ struct ShareWorker struct SharePass : public Pass { SharePass() : Pass("share", "perform sat-based resource sharing") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -1453,7 +1457,7 @@ struct SharePass : public Pass { log(" Only perform the first N merges, then stop. This is useful for debugging.\n"); log("\n"); } - virtual void execute(std::vector<std::string> args, RTLIL::Design *design) + void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE { ShareWorkerConfig config; @@ -1462,43 +1466,43 @@ struct SharePass : public Pass { config.opt_aggressive = false; config.opt_fast = false; - config.generic_uni_ops.insert("$not"); - // config.generic_uni_ops.insert("$pos"); - config.generic_uni_ops.insert("$neg"); - - config.generic_cbin_ops.insert("$and"); - config.generic_cbin_ops.insert("$or"); - config.generic_cbin_ops.insert("$xor"); - config.generic_cbin_ops.insert("$xnor"); - - config.generic_bin_ops.insert("$shl"); - config.generic_bin_ops.insert("$shr"); - config.generic_bin_ops.insert("$sshl"); - config.generic_bin_ops.insert("$sshr"); - - config.generic_bin_ops.insert("$lt"); - config.generic_bin_ops.insert("$le"); - config.generic_bin_ops.insert("$eq"); - config.generic_bin_ops.insert("$ne"); - config.generic_bin_ops.insert("$eqx"); - config.generic_bin_ops.insert("$nex"); - config.generic_bin_ops.insert("$ge"); - config.generic_bin_ops.insert("$gt"); - - config.generic_cbin_ops.insert("$add"); - config.generic_cbin_ops.insert("$mul"); - - config.generic_bin_ops.insert("$sub"); - config.generic_bin_ops.insert("$div"); - config.generic_bin_ops.insert("$mod"); - // config.generic_bin_ops.insert("$pow"); - - config.generic_uni_ops.insert("$logic_not"); - config.generic_cbin_ops.insert("$logic_and"); - config.generic_cbin_ops.insert("$logic_or"); - - config.generic_other_ops.insert("$alu"); - config.generic_other_ops.insert("$macc"); + config.generic_uni_ops.insert(ID($not)); + // config.generic_uni_ops.insert(ID($pos)); + config.generic_uni_ops.insert(ID($neg)); + + config.generic_cbin_ops.insert(ID($and)); + config.generic_cbin_ops.insert(ID($or)); + config.generic_cbin_ops.insert(ID($xor)); + config.generic_cbin_ops.insert(ID($xnor)); + + config.generic_bin_ops.insert(ID($shl)); + config.generic_bin_ops.insert(ID($shr)); + config.generic_bin_ops.insert(ID($sshl)); + config.generic_bin_ops.insert(ID($sshr)); + + config.generic_bin_ops.insert(ID($lt)); + config.generic_bin_ops.insert(ID($le)); + config.generic_bin_ops.insert(ID($eq)); + config.generic_bin_ops.insert(ID($ne)); + config.generic_bin_ops.insert(ID($eqx)); + config.generic_bin_ops.insert(ID($nex)); + config.generic_bin_ops.insert(ID($ge)); + config.generic_bin_ops.insert(ID($gt)); + + config.generic_cbin_ops.insert(ID($add)); + config.generic_cbin_ops.insert(ID($mul)); + + config.generic_bin_ops.insert(ID($sub)); + config.generic_bin_ops.insert(ID($div)); + config.generic_bin_ops.insert(ID($mod)); + // config.generic_bin_ops.insert(ID($pow)); + + config.generic_uni_ops.insert(ID($logic_not)); + config.generic_cbin_ops.insert(ID($logic_and)); + config.generic_cbin_ops.insert(ID($logic_or)); + + config.generic_other_ops.insert(ID($alu)); + config.generic_other_ops.insert(ID($macc)); log_header(design, "Executing SHARE pass (SAT-based resource sharing).\n"); diff --git a/passes/opt/wreduce.cc b/passes/opt/wreduce.cc index 07503fbb3..04b882db9 100644 --- a/passes/opt/wreduce.cc +++ b/passes/opt/wreduce.cc @@ -22,23 +22,24 @@ #include "kernel/modtools.h" USING_YOSYS_NAMESPACE -using namespace RTLIL; PRIVATE_NAMESPACE_BEGIN struct WreduceConfig { pool<IdString> supported_cell_types; + bool keepdc = false; WreduceConfig() { supported_cell_types = pool<IdString>({ - "$not", "$pos", "$neg", - "$and", "$or", "$xor", "$xnor", - "$shl", "$shr", "$sshl", "$sshr", "$shift", "$shiftx", - "$lt", "$le", "$eq", "$ne", "$eqx", "$nex", "$ge", "$gt", - "$add", "$sub", "$mul", // "$div", "$mod", "$pow", - "$mux", "$pmux" + ID($not), ID($pos), ID($neg), + ID($and), ID($or), ID($xor), ID($xnor), + ID($shl), ID($shr), ID($sshl), ID($sshr), ID($shift), ID($shiftx), + ID($lt), ID($le), ID($eq), ID($ne), ID($eqx), ID($nex), ID($ge), ID($gt), + ID($add), ID($sub), ID($mul), // ID($div), ID($mod), ID($pow), + ID($mux), ID($pmux), + ID($dff), ID($adff) }); } }; @@ -52,6 +53,8 @@ struct WreduceWorker std::set<Cell*, IdString::compare_ptr_by_name<Cell>> work_queue_cells; std::set<SigBit> work_queue_bits; pool<SigBit> keep_bits; + dict<SigBit, State> init_bits; + pool<SigBit> remove_init_bits; WreduceWorker(WreduceConfig *config, Module *module) : config(config), module(module), mi(module) { } @@ -60,10 +63,10 @@ struct WreduceWorker { // Reduce size of MUX if inputs agree on a value for a bit or a output bit is unused - SigSpec sig_a = mi.sigmap(cell->getPort("\\A")); - SigSpec sig_b = mi.sigmap(cell->getPort("\\B")); - SigSpec sig_s = mi.sigmap(cell->getPort("\\S")); - SigSpec sig_y = mi.sigmap(cell->getPort("\\Y")); + SigSpec sig_a = mi.sigmap(cell->getPort(ID::A)); + SigSpec sig_b = mi.sigmap(cell->getPort(ID::B)); + SigSpec sig_s = mi.sigmap(cell->getPort(ID(S))); + SigSpec sig_y = mi.sigmap(cell->getPort(ID::Y)); std::vector<SigBit> bits_removed; if (sig_y.has_const()) @@ -73,15 +76,15 @@ struct WreduceWorker { auto info = mi.query(sig_y[i]); if (!info->is_output && GetSize(info->ports) <= 1 && !keep_bits.count(mi.sigmap(sig_y[i]))) { - bits_removed.push_back(Sx); + bits_removed.push_back(State::Sx); continue; } SigBit ref = sig_a[i]; for (int k = 0; k < GetSize(sig_s); k++) { - if (ref != Sx && sig_b[k*GetSize(sig_a) + i] != Sx && ref != sig_b[k*GetSize(sig_a) + i]) + if ((config->keepdc || (ref != State::Sx && sig_b[k*GetSize(sig_a) + i] != State::Sx)) && ref != sig_b[k*GetSize(sig_a) + i]) goto no_match_ab; - if (sig_b[k*GetSize(sig_a) + i] != Sx) + if (sig_b[k*GetSize(sig_a) + i] != State::Sx) ref = sig_b[k*GetSize(sig_a) + i]; } if (0) @@ -126,20 +129,113 @@ struct WreduceWorker for (auto bit : new_work_queue_bits) work_queue_bits.insert(bit); - cell->setPort("\\A", new_sig_a); - cell->setPort("\\B", new_sig_b); - cell->setPort("\\Y", new_sig_y); + cell->setPort(ID::A, new_sig_a); + cell->setPort(ID::B, new_sig_b); + cell->setPort(ID::Y, new_sig_y); cell->fixup_parameters(); module->connect(sig_y.extract(n_kept, n_removed), sig_removed); } + void run_cell_dff(Cell *cell) + { + // Reduce size of FF if inputs are just sign/zero extended or output bit is not used + + SigSpec sig_d = mi.sigmap(cell->getPort(ID(D))); + SigSpec sig_q = mi.sigmap(cell->getPort(ID(Q))); + bool is_adff = (cell->type == ID($adff)); + Const initval, arst_value; + + int width_before = GetSize(sig_q); + + if (width_before == 0) + return; + + if (cell->parameters.count(ID(ARST_VALUE))) { + arst_value = cell->parameters[ID(ARST_VALUE)]; + } + + bool zero_ext = sig_d[GetSize(sig_d)-1] == State::S0; + bool sign_ext = !zero_ext; + + for (int i = 0; i < GetSize(sig_q); i++) { + SigBit bit = sig_q[i]; + if (init_bits.count(bit)) + initval.bits.push_back(init_bits.at(bit)); + else + initval.bits.push_back(State::Sx); + } + + for (int i = GetSize(sig_q)-1; i >= 0; i--) + { + if (zero_ext && sig_d[i] == State::S0 && (initval[i] == State::S0 || initval[i] == State::Sx) && + (!is_adff || i >= GetSize(arst_value) || arst_value[i] == State::S0 || arst_value[i] == State::Sx)) { + module->connect(sig_q[i], State::S0); + remove_init_bits.insert(sig_q[i]); + sig_d.remove(i); + sig_q.remove(i); + continue; + } + + if (sign_ext && i > 0 && sig_d[i] == sig_d[i-1] && initval[i] == initval[i-1] && + (!is_adff || i >= GetSize(arst_value) || arst_value[i] == arst_value[i-1])) { + module->connect(sig_q[i], sig_q[i-1]); + remove_init_bits.insert(sig_q[i]); + sig_d.remove(i); + sig_q.remove(i); + continue; + } + + auto info = mi.query(sig_q[i]); + if (info == nullptr) + return; + if (!info->is_output && GetSize(info->ports) == 1 && !keep_bits.count(mi.sigmap(sig_q[i]))) { + remove_init_bits.insert(sig_q[i]); + sig_d.remove(i); + sig_q.remove(i); + zero_ext = false; + sign_ext = false; + continue; + } + + break; + } + + if (width_before == GetSize(sig_q)) + return; + + if (GetSize(sig_q) == 0) { + log("Removed cell %s.%s (%s).\n", log_id(module), log_id(cell), log_id(cell->type)); + module->remove(cell); + return; + } + + log("Removed top %d bits (of %d) from FF cell %s.%s (%s).\n", width_before - GetSize(sig_q), width_before, + log_id(module), log_id(cell), log_id(cell->type)); + + for (auto bit : sig_d) + work_queue_bits.insert(bit); + + for (auto bit : sig_q) + work_queue_bits.insert(bit); + + // Narrow ARST_VALUE parameter to new size. + if (cell->parameters.count(ID(ARST_VALUE))) { + arst_value.bits.resize(GetSize(sig_q)); + cell->setParam(ID(ARST_VALUE), arst_value); + } + + cell->setPort(ID(D), sig_d); + cell->setPort(ID(Q), sig_q); + cell->fixup_parameters(); + } + void run_reduce_inport(Cell *cell, char port, int max_port_size, bool &port_signed, bool &did_something) { port_signed = cell->getParam(stringf("\\%c_SIGNED", port)).as_bool(); SigSpec sig = mi.sigmap(cell->getPort(stringf("\\%c", port))); - if (port == 'B' && cell->type.in("$shl", "$shr", "$sshl", "$sshr")) + if (port == 'B' && cell->type.in(ID($shl), ID($shr), ID($sshl), ID($sshr))) port_signed = false; int bits_removed = 0; @@ -154,7 +250,7 @@ struct WreduceWorker while (GetSize(sig) > 1 && sig[GetSize(sig)-1] == sig[GetSize(sig)-2]) work_queue_bits.insert(sig[GetSize(sig)-1]), sig.remove(GetSize(sig)-1), bits_removed++; } else { - while (GetSize(sig) > 1 && sig[GetSize(sig)-1] == S0) + while (GetSize(sig) > 1 && sig[GetSize(sig)-1] == State::S0) work_queue_bits.insert(sig[GetSize(sig)-1]), sig.remove(GetSize(sig)-1), bits_removed++; } @@ -173,10 +269,13 @@ struct WreduceWorker if (!cell->type.in(config->supported_cell_types)) return; - if (cell->type.in("$mux", "$pmux")) + if (cell->type.in(ID($mux), ID($pmux))) return run_cell_mux(cell); - SigSpec sig = mi.sigmap(cell->getPort("\\Y")); + if (cell->type.in(ID($dff), ID($adff))) + return run_cell_dff(cell); + + SigSpec sig = mi.sigmap(cell->getPort(ID::Y)); if (sig.has_const()) return; @@ -184,10 +283,10 @@ struct WreduceWorker // Reduce size of ports A and B based on constant input bits and size of output port - int max_port_a_size = cell->hasPort("\\A") ? GetSize(cell->getPort("\\A")) : -1; - int max_port_b_size = cell->hasPort("\\B") ? GetSize(cell->getPort("\\B")) : -1; + int max_port_a_size = cell->hasPort(ID::A) ? GetSize(cell->getPort(ID::A)) : -1; + int max_port_b_size = cell->hasPort(ID::B) ? GetSize(cell->getPort(ID::B)) : -1; - if (cell->type.in("$not", "$pos", "$neg", "$and", "$or", "$xor", "$add", "$sub")) { + if (cell->type.in(ID($not), ID($pos), ID($neg), ID($and), ID($or), ID($xor), ID($add), ID($sub))) { max_port_a_size = min(max_port_a_size, GetSize(sig)); max_port_b_size = min(max_port_b_size, GetSize(sig)); } @@ -195,32 +294,32 @@ struct WreduceWorker bool port_a_signed = false; bool port_b_signed = false; - if (max_port_a_size >= 0 && cell->type != "$shiftx") + if (max_port_a_size >= 0 && cell->type != ID($shiftx)) run_reduce_inport(cell, 'A', max_port_a_size, port_a_signed, did_something); if (max_port_b_size >= 0) run_reduce_inport(cell, 'B', max_port_b_size, port_b_signed, did_something); - if (cell->hasPort("\\A") && cell->hasPort("\\B") && port_a_signed && port_b_signed) { - SigSpec sig_a = mi.sigmap(cell->getPort("\\A")), sig_b = mi.sigmap(cell->getPort("\\B")); + if (cell->hasPort(ID::A) && cell->hasPort(ID::B) && port_a_signed && port_b_signed) { + SigSpec sig_a = mi.sigmap(cell->getPort(ID::A)), sig_b = mi.sigmap(cell->getPort(ID::B)); if (GetSize(sig_a) > 0 && sig_a[GetSize(sig_a)-1] == State::S0 && GetSize(sig_b) > 0 && sig_b[GetSize(sig_b)-1] == State::S0) { log("Converting cell %s.%s (%s) from signed to unsigned.\n", log_id(module), log_id(cell), log_id(cell->type)); - cell->setParam("\\A_SIGNED", 0); - cell->setParam("\\B_SIGNED", 0); + cell->setParam(ID(A_SIGNED), 0); + cell->setParam(ID(B_SIGNED), 0); port_a_signed = false; port_b_signed = false; did_something = true; } } - if (cell->hasPort("\\A") && !cell->hasPort("\\B") && port_a_signed) { - SigSpec sig_a = mi.sigmap(cell->getPort("\\A")); + if (cell->hasPort(ID::A) && !cell->hasPort(ID::B) && port_a_signed) { + SigSpec sig_a = mi.sigmap(cell->getPort(ID::A)); if (GetSize(sig_a) > 0 && sig_a[GetSize(sig_a)-1] == State::S0) { log("Converting cell %s.%s (%s) from signed to unsigned.\n", log_id(module), log_id(cell), log_id(cell->type)); - cell->setParam("\\A_SIGNED", 0); + cell->setParam(ID(A_SIGNED), 0); port_a_signed = false; did_something = true; } @@ -230,13 +329,16 @@ struct WreduceWorker // Reduce size of port Y based on sizes for A and B and unused bits in Y int bits_removed = 0; - if (port_a_signed && cell->type == "$shr") { + if (port_a_signed && cell->type == ID($shr)) { // do not reduce size of output on $shr cells with signed A inputs } else { while (GetSize(sig) > 0) { - auto info = mi.query(sig[GetSize(sig)-1]); + auto bit = sig[GetSize(sig)-1]; + if (keep_bits.count(bit)) + break; + auto info = mi.query(bit); if (info->is_output || GetSize(info->ports) > 1) break; @@ -245,24 +347,24 @@ struct WreduceWorker } } - if (cell->type.in("$pos", "$add", "$mul", "$and", "$or", "$xor")) + if (cell->type.in(ID($pos), ID($add), ID($mul), ID($and), ID($or), ID($xor), ID($sub))) { - bool is_signed = cell->getParam("\\A_SIGNED").as_bool(); + bool is_signed = cell->getParam(ID(A_SIGNED)).as_bool() || cell->type == ID($sub); int a_size = 0, b_size = 0; - if (cell->hasPort("\\A")) a_size = GetSize(cell->getPort("\\A")); - if (cell->hasPort("\\B")) b_size = GetSize(cell->getPort("\\B")); + if (cell->hasPort(ID::A)) a_size = GetSize(cell->getPort(ID::A)); + if (cell->hasPort(ID::B)) b_size = GetSize(cell->getPort(ID::B)); int max_y_size = max(a_size, b_size); - if (cell->type == "$add") + if (cell->type.in(ID($add), ID($sub))) max_y_size++; - if (cell->type == "$mul") + if (cell->type == ID($mul)) max_y_size = a_size + b_size; while (GetSize(sig) > 1 && GetSize(sig) > max_y_size) { - module->connect(sig[GetSize(sig)-1], is_signed ? sig[GetSize(sig)-2] : S0); + module->connect(sig[GetSize(sig)-1], is_signed ? sig[GetSize(sig)-2] : State::S0); sig.remove(GetSize(sig)-1); bits_removed++; } @@ -277,7 +379,7 @@ struct WreduceWorker if (bits_removed) { log("Removed top %d bits (of %d) from port Y of cell %s.%s (%s).\n", bits_removed, GetSize(sig) + bits_removed, log_id(module), log_id(cell), log_id(cell->type)); - cell->setPort("\\Y", sig); + cell->setPort(ID::Y, sig); did_something = true; } @@ -290,17 +392,28 @@ struct WreduceWorker static int count_nontrivial_wire_attrs(RTLIL::Wire *w) { int count = w->attributes.size(); - count -= w->attributes.count("\\src"); - count -= w->attributes.count("\\unused_bits"); + count -= w->attributes.count(ID(src)); + count -= w->attributes.count(ID(unused_bits)); return count; } void run() { - for (auto w : module->wires()) - if (w->get_bool_attribute("\\keep")) + // create a copy as mi.sigmap will be updated as we process the module + SigMap init_attr_sigmap = mi.sigmap; + + for (auto w : module->wires()) { + if (w->get_bool_attribute(ID::keep)) for (auto bit : mi.sigmap(w)) keep_bits.insert(bit); + if (w->attributes.count(ID(init))) { + Const initval = w->attributes.at(ID(init)); + SigSpec initsig = init_attr_sigmap(w); + int width = std::min(GetSize(initval), GetSize(initsig)); + for (int i = 0; i < width; i++) + init_bits[initsig[i]] = initval[i]; + } + } for (auto c : module->selected_cells()) work_queue_cells.insert(c); @@ -348,12 +461,28 @@ struct WreduceWorker module->connect(nw, SigSpec(w).extract(0, GetSize(nw))); module->swap_names(w, nw); } + + if (!remove_init_bits.empty()) { + for (auto w : module->wires()) { + if (w->attributes.count(ID(init))) { + Const initval = w->attributes.at(ID(init)); + Const new_initval(State::Sx, GetSize(w)); + SigSpec initsig = init_attr_sigmap(w); + int width = std::min(GetSize(initval), GetSize(initsig)); + for (int i = 0; i < width; i++) { + if (!remove_init_bits.count(initsig[i])) + new_initval[i] = initval[i]; + } + w->attributes.at(ID(init)) = new_initval; + } + } + } } }; struct WreducePass : public Pass { WreducePass() : Pass("wreduce", "reduce the word size of operations if possible") { } - virtual void help() + void help() YS_OVERRIDE { // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| log("\n"); @@ -372,8 +501,11 @@ struct WreducePass : public Pass { log(" Do not change the width of memory address ports. Use this options in\n"); log(" flows that use the 'memory_memx' pass.\n"); log("\n"); + log(" -keepdc\n"); + log(" Do not optimize explicit don't-care values.\n"); + log("\n"); } - virtual void execute(std::vector<std::string> args, Design *design) + void execute(std::vector<std::string> args, Design *design) YS_OVERRIDE { WreduceConfig config; bool opt_memx = false; @@ -386,6 +518,10 @@ struct WreducePass : public Pass { opt_memx = true; continue; } + if (args[argidx] == "-keepdc") { + config.keepdc = true; + continue; + } break; } extra_args(args, argidx, design); @@ -397,30 +533,66 @@ struct WreducePass : public Pass { for (auto c : module->selected_cells()) { - if (c->type.in("$reduce_and", "$reduce_or", "$reduce_xor", "$reduce_xnor", "$reduce_bool", - "$lt", "$le", "$eq", "$ne", "$eqx", "$nex", "$ge", "$gt", - "$logic_not", "$logic_and", "$logic_or") && GetSize(c->getPort("\\Y")) > 1) { - SigSpec sig = c->getPort("\\Y"); + if (c->type.in(ID($reduce_and), ID($reduce_or), ID($reduce_xor), ID($reduce_xnor), ID($reduce_bool), + ID($lt), ID($le), ID($eq), ID($ne), ID($eqx), ID($nex), ID($ge), ID($gt), + ID($logic_not), ID($logic_and), ID($logic_or)) && GetSize(c->getPort(ID::Y)) > 1) { + SigSpec sig = c->getPort(ID::Y); if (!sig.has_const()) { - c->setPort("\\Y", sig[0]); - c->setParam("\\Y_WIDTH", 1); + c->setPort(ID::Y, sig[0]); + c->setParam(ID(Y_WIDTH), 1); sig.remove(0); module->connect(sig, Const(0, GetSize(sig))); } } - if (!opt_memx && c->type.in("$memrd", "$memwr", "$meminit")) { - IdString memid = c->getParam("\\MEMID").decode_string(); + + if (c->type.in(ID($div), ID($mod), ID($pow))) + { + SigSpec A = c->getPort(ID::A); + int original_a_width = GetSize(A); + if (c->getParam(ID(A_SIGNED)).as_bool()) { + while (GetSize(A) > 1 && A[GetSize(A)-1] == State::S0 && A[GetSize(A)-2] == State::S0) + A.remove(GetSize(A)-1, 1); + } else { + while (GetSize(A) > 0 && A[GetSize(A)-1] == State::S0) + A.remove(GetSize(A)-1, 1); + } + if (original_a_width != GetSize(A)) { + log("Removed top %d bits (of %d) from port A of cell %s.%s (%s).\n", + original_a_width-GetSize(A), original_a_width, log_id(module), log_id(c), log_id(c->type)); + c->setPort(ID::A, A); + c->setParam(ID(A_WIDTH), GetSize(A)); + } + + SigSpec B = c->getPort(ID::B); + int original_b_width = GetSize(B); + if (c->getParam(ID(B_SIGNED)).as_bool()) { + while (GetSize(B) > 1 && B[GetSize(B)-1] == State::S0 && B[GetSize(B)-2] == State::S0) + B.remove(GetSize(B)-1, 1); + } else { + while (GetSize(B) > 0 && B[GetSize(B)-1] == State::S0) + B.remove(GetSize(B)-1, 1); + } + if (original_b_width != GetSize(B)) { + log("Removed top %d bits (of %d) from port B of cell %s.%s (%s).\n", + original_b_width-GetSize(B), original_b_width, log_id(module), log_id(c), log_id(c->type)); + c->setPort(ID::B, B); + c->setParam(ID(B_WIDTH), GetSize(B)); + } + } + + if (!opt_memx && c->type.in(ID($memrd), ID($memwr), ID($meminit))) { + IdString memid = c->getParam(ID(MEMID)).decode_string(); RTLIL::Memory *mem = module->memories.at(memid); if (mem->start_offset >= 0) { - int cur_addrbits = c->getParam("\\ABITS").as_int(); + int cur_addrbits = c->getParam(ID(ABITS)).as_int(); int max_addrbits = ceil_log2(mem->start_offset + mem->size); if (cur_addrbits > max_addrbits) { log("Removed top %d address bits (of %d) from memory %s port %s.%s (%s).\n", cur_addrbits-max_addrbits, cur_addrbits, - c->type == "$memrd" ? "read" : c->type == "$memwr" ? "write" : "init", + c->type == ID($memrd) ? "read" : c->type == ID($memwr) ? "write" : "init", log_id(module), log_id(c), log_id(memid)); - c->setParam("\\ABITS", max_addrbits); - c->setPort("\\ADDR", c->getPort("\\ADDR").extract(0, max_addrbits)); + c->setParam(ID(ABITS), max_addrbits); + c->setPort(ID(ADDR), c->getPort(ID(ADDR)).extract(0, max_addrbits)); } } } |