mirror of https://github.com/YosysHQ/yosys.git
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Claire Xenia Wolf <claire@yosyshq.com>
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* Akash Levy <akash@silimate.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/yosys.h"
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#include "kernel/sigtools.h"
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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bool did_something;
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#include "passes/silimate/peepopt_expand.h"
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struct OptExpandPass : public Pass {
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OptExpandPass() : Pass("opt_expand", "expand conjunction") { }
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void help() override
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{
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// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
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log("\n");
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log(" opt_expand [selection]\n");
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log("\n");
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log("This pass expands conjunction (AND) operations into disjunction (OR).\n");
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log("\n");
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log("y = (a | b) & c ===> y = (a & c) | (b & c)\n");
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log("\n");
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log(" -max_iters n\n");
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log(" max number of pass iterations to run.\n");
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log("\n");
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}
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void execute(std::vector<std::string> args, RTLIL::Design *design) override
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{
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log_header(design, "Executing OPT_EXPAND pass (expand conjunction into disjunction).\n");
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size_t argidx;
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int max_iters = 10000;
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for (argidx = 1; argidx < args.size(); argidx++) {
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// No extra arguments
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if (args[argidx] == "-max_iters" && argidx + 1 < args.size()) {
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max_iters = std::stoi(args[++argidx]);
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continue;
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}
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break;
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}
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extra_args(args, argidx, design);
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for (auto module : design->selected_modules())
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{
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did_something = true;
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for (int i = 0; did_something && i < max_iters; i++)
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{
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log("ITERATION OF OPT_EXPAND\n");
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did_something = false;
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peepopt_pm pm(module);
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pm.setup(module->selected_cells());
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pm.run_expand();
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}
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}
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}
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} PeepoptPass;
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PRIVATE_NAMESPACE_END
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