From 07c854b7afc793a589df06c7fce200260378b379 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Wed, 13 Nov 2019 13:41:16 +0100 Subject: [PATCH] Add "autoname" pass and use it in "synth_ice40" Signed-off-by: Clifford Wolf --- passes/cmds/Makefile.inc | 1 + passes/cmds/autoname.cc | 134 ++++++++++++++++++++++++++++++++++ techlibs/ice40/synth_ice40.cc | 1 + 3 files changed, 136 insertions(+) create mode 100644 passes/cmds/autoname.cc diff --git a/passes/cmds/Makefile.inc b/passes/cmds/Makefile.inc index cf9663d1d..c7edc30fb 100644 --- a/passes/cmds/Makefile.inc +++ b/passes/cmds/Makefile.inc @@ -5,6 +5,7 @@ OBJS += passes/cmds/design.o OBJS += passes/cmds/select.o OBJS += passes/cmds/show.o OBJS += passes/cmds/rename.o +OBJS += passes/cmds/autoname.o OBJS += passes/cmds/connect.o OBJS += passes/cmds/scatter.o OBJS += passes/cmds/setundef.o diff --git a/passes/cmds/autoname.cc b/passes/cmds/autoname.cc new file mode 100644 index 000000000..4614a8153 --- /dev/null +++ b/passes/cmds/autoname.cc @@ -0,0 +1,134 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf + * + * 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" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +int autoname_worker(Module *module) +{ + dict> proposed_cell_names; + dict> proposed_wire_names; + dict wire_score; + int best_score = -1; + + for (auto cell : module->selected_cells()) + for (auto &conn : cell->connections()) + for (auto bit : conn.second) + if (bit.wire != nullptr) + wire_score[bit.wire]++; + + for (auto cell : module->selected_cells()) { + if (cell->name[0] == '$') { + for (auto &conn : cell->connections()) { + string suffix = stringf("_%s_%s", log_id(cell->type), log_id(conn.first)); + for (auto bit : conn.second) + if (bit.wire != nullptr && bit.wire->name[0] != '$') { + IdString new_name(bit.wire->name.str() + suffix); + int score = wire_score.at(bit.wire); + if (cell->output(conn.first)) score = 0; + score = 10000*score + new_name.size(); + if (!proposed_cell_names.count(cell) || score < proposed_cell_names.at(cell).first) { + if (best_score < 0 || score < best_score) + best_score = score; + proposed_cell_names[cell] = make_pair(score, new_name); + } + } + } + } else { + for (auto &conn : cell->connections()) { + string suffix = stringf("_%s", log_id(conn.first)); + for (auto bit : conn.second) + if (bit.wire != nullptr && bit.wire->name[0] == '$') { + IdString new_name(cell->name.str() + suffix); + int score = wire_score.at(bit.wire); + if (cell->output(conn.first)) score = 0; + score = 10000*score + new_name.size(); + if (!proposed_wire_names.count(bit.wire) || score < proposed_wire_names.at(bit.wire).first) { + if (best_score < 0 || score < best_score) + best_score = score; + proposed_wire_names[bit.wire] = make_pair(score, new_name); + } + } + } + } + } + + for (auto &it : proposed_cell_names) { + if (best_score*2 < it.second.first) + continue; + IdString n = module->uniquify(it.second.second); + log_debug("Rename cell %s in %s to %s.\n", log_id(it.first), log_id(module), log_id(n)); + module->rename(it.first, n); + } + + for (auto &it : proposed_wire_names) { + if (best_score*2 < it.second.first) + continue; + IdString n = module->uniquify(it.second.second); + log_debug("Rename wire %s in %s to %s.\n", log_id(it.first), log_id(module), log_id(n)); + module->rename(it.first, n); + } + + return proposed_cell_names.size() + proposed_wire_names.size(); +} + +struct AutonamePass : public Pass { + AutonamePass() : Pass("autoname", "automatically assign names to objects") { } + void help() YS_OVERRIDE + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" autoname [selection]\n"); + log("\n"); + log("Assign auto-generated public names to objects with private names (the ones\n"); + log("with $-prefix).\n"); + log("\n"); + } + void execute(std::vector args, RTLIL::Design *design) YS_OVERRIDE + { + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) + { + // if (args[argidx] == "-foo") { + // foo = true; + // continue; + // } + break; + } + + log_header(design, "Executing AUTONAME pass.\n"); + + for (auto module : design->selected_modules()) + { + int count = 0, iter = 0; + while (1) { + iter++; + int n = autoname_worker(module); + if (!n) break; + count += n; + } + if (count > 0) + log("Renamed %d objects in module %s (%d iterations).\n", count, log_id(module), iter); + } + } +} AutonamePass; + +PRIVATE_NAMESPACE_END diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc index c942126e1..901194b06 100644 --- a/techlibs/ice40/synth_ice40.cc +++ b/techlibs/ice40/synth_ice40.cc @@ -380,6 +380,7 @@ struct SynthIce40Pass : public ScriptPass if (check_label("check")) { + run("autoname"); run("hierarchy -check"); run("stat"); run("check -noinit"); -- 2.30.2