mirror of
https://github.com/YosysHQ/yosys
synced 2025-10-31 03:32:29 +00:00
3aa4484a3c
o Not all derived methods were marked 'override', but it is a great feature of C++11 that we should make use of. o While at it: touched header files got a -*- c++ -*- for emacs to provide support for that language. o use YS_OVERRIDE for all override keywords (though we should probably use the plain keyword going forward now that C++11 is established)
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
|
|
* 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"
|
|
|
|
USING_YOSYS_NAMESPACE
|
|
PRIVATE_NAMESPACE_BEGIN
|
|
|
|
struct EquivRemovePass : public Pass {
|
|
EquivRemovePass() : Pass("equiv_remove", "remove $equiv cells") { }
|
|
void help() YS_OVERRIDE
|
|
{
|
|
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
|
|
log("\n");
|
|
log(" equiv_remove [options] [selection]\n");
|
|
log("\n");
|
|
log("This command removes the selected $equiv cells. If neither -gold nor -gate is\n");
|
|
log("used then only proven cells are removed.\n");
|
|
log("\n");
|
|
log(" -gold\n");
|
|
log(" keep gold circuit\n");
|
|
log("\n");
|
|
log(" -gate\n");
|
|
log(" keep gate circuit\n");
|
|
log("\n");
|
|
}
|
|
void execute(std::vector<std::string> args, Design *design) YS_OVERRIDE
|
|
{
|
|
bool mode_gold = false;
|
|
bool mode_gate = false;
|
|
int remove_count = 0;
|
|
|
|
log_header(design, "Executing EQUIV_REMOVE pass.\n");
|
|
|
|
size_t argidx;
|
|
for (argidx = 1; argidx < args.size(); argidx++) {
|
|
if (args[argidx] == "-gold") {
|
|
mode_gold = true;
|
|
continue;
|
|
}
|
|
if (args[argidx] == "-gate") {
|
|
mode_gate = true;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
extra_args(args, argidx, design);
|
|
|
|
if (mode_gold && mode_gate)
|
|
log_cmd_error("Options -gold and -gate are exclusive.\n");
|
|
|
|
for (auto module : design->selected_modules())
|
|
{
|
|
for (auto cell : module->selected_cells())
|
|
if (cell->type == "$equiv" && (mode_gold || mode_gate || cell->getPort("\\A") == cell->getPort("\\B"))) {
|
|
log("Removing $equiv cell %s.%s (%s).\n", log_id(module), log_id(cell), log_signal(cell->getPort("\\Y")));
|
|
module->connect(cell->getPort("\\Y"), mode_gate ? cell->getPort("\\B") : cell->getPort("\\A"));
|
|
module->remove(cell);
|
|
remove_count++;
|
|
}
|
|
}
|
|
|
|
log("Removed a total of %d $equiv cells.\n", remove_count);
|
|
}
|
|
} EquivRemovePass;
|
|
|
|
PRIVATE_NAMESPACE_END
|