mirror of https://github.com/YosysHQ/yosys.git
115 lines
3.5 KiB
C++
115 lines
3.5 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 "opt_status.h"
|
|
#include "kernel/register.h"
|
|
#include "kernel/log.h"
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
bool OPT_DID_SOMETHING;
|
|
|
|
struct OptPass : public Pass {
|
|
OptPass() : Pass("opt", "perform simple optimizations") { }
|
|
virtual void help()
|
|
{
|
|
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
|
|
log("\n");
|
|
log(" opt [-purge] [-mux_undef] [-mux_bool] [-undriven] [-fine] [selection]\n");
|
|
log("\n");
|
|
log("This pass calls all the other opt_* passes in a useful order. This performs\n");
|
|
log("a series of trivial optimizations and cleanups. This pass executes the other\n");
|
|
log("passes in the following order:\n");
|
|
log("\n");
|
|
log(" opt_const\n");
|
|
log(" opt_share -nomux\n");
|
|
log("\n");
|
|
log(" do\n");
|
|
log(" opt_muxtree\n");
|
|
log(" opt_reduce [-fine]\n");
|
|
log(" opt_share\n");
|
|
log(" opt_rmdff\n");
|
|
log(" opt_clean [-purge]\n");
|
|
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine]\n");
|
|
log(" while [changed design]\n");
|
|
log("\n");
|
|
}
|
|
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
|
|
{
|
|
std::string opt_clean_args;
|
|
std::string opt_const_args;
|
|
std::string opt_reduce_args;
|
|
|
|
log_header("Executing OPT pass (performing simple optimizations).\n");
|
|
log_push();
|
|
|
|
size_t argidx;
|
|
for (argidx = 1; argidx < args.size(); argidx++) {
|
|
if (args[argidx] == "-purge") {
|
|
opt_clean_args += " -purge";
|
|
continue;
|
|
}
|
|
if (args[argidx] == "-mux_undef") {
|
|
opt_const_args += " -mux_undef";
|
|
continue;
|
|
}
|
|
if (args[argidx] == "-mux_bool") {
|
|
opt_const_args += " -mux_bool";
|
|
continue;
|
|
}
|
|
if (args[argidx] == "-undriven") {
|
|
opt_const_args += " -undriven";
|
|
continue;
|
|
}
|
|
if (args[argidx] == "-fine") {
|
|
opt_const_args += " -fine";
|
|
opt_reduce_args += " -fine";
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
extra_args(args, argidx, design);
|
|
|
|
log_header("Optimizing in-memory representation of design.\n");
|
|
design->optimize();
|
|
|
|
Pass::call(design, "opt_const");
|
|
Pass::call(design, "opt_share -nomux");
|
|
while (1) {
|
|
OPT_DID_SOMETHING = false;
|
|
Pass::call(design, "opt_muxtree");
|
|
Pass::call(design, "opt_reduce" + opt_reduce_args);
|
|
Pass::call(design, "opt_share");
|
|
Pass::call(design, "opt_rmdff");
|
|
Pass::call(design, "opt_clean" + opt_clean_args);
|
|
Pass::call(design, "opt_const" + opt_const_args);
|
|
if (OPT_DID_SOMETHING == false)
|
|
break;
|
|
log_header("Rerunning OPT passes. (Maybe there is more to do..)\n");
|
|
}
|
|
|
|
log_header("Optimizing in-memory representation of design.\n");
|
|
design->optimize();
|
|
|
|
log_header("Finished OPT passes. (There is nothing left to do.)\n");
|
|
log_pop();
|
|
}
|
|
} OptPass;
|
|
|