mirror of https://github.com/YosysHQ/yosys.git
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
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/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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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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struct Dff2dffeWorker
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{
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RTLIL::Module *module;
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SigMap sigmap;
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Dff2dffeWorker(RTLIL::Module *module) : module(module), sigmap(module)
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{
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}
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void run()
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{
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log("Transforming $dff to $dffe cells in module %s:\n", log_id(module));
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}
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};
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struct Dff2dffePass : public Pass {
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Dff2dffePass() : Pass("dff2dffe", "transform $dff cells to $dffe cells") { }
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virtual void help()
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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(" dff2dffe [selection]\n");
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log("\n");
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log("This pass transforms $dff cells driven by a tree of multiplexers with one or\n");
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log("more feedback paths to a $dffe cells.\n");
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log("\n");
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}
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virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
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{
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log_header("Executing DFF2DFFE pass (transform $dff to $dffe where applicable).\n");
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++) {
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// if (args[argidx] == "-foobar") {
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// foobar_mode = true;
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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 mod : design->selected_modules())
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if (!mod->has_processes_warn()) {
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Dff2dffeWorker worker(mod);
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worker.run();
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}
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}
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} Dff2dffePass;
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PRIVATE_NAMESPACE_END
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