mirror of
https://github.com/YosysHQ/yosys
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101 lines
3 KiB
C++
101 lines
3 KiB
C++
/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2017 Robert Ou <rqou@robertou.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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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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struct RecoverReducePass : public ScriptPass
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{
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RecoverReducePass() : ScriptPass("recover_reduce", "recovers $reduce_* from gates") {}
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virtual void help() YS_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(" recover_reduce [options]\n");
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log("\n");
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log("recovers $reduce_* from gates\n");
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log("\n");
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log("Reconstructs $reduce_* elements (e.g. larger gates) given a netlist of gates.");
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log("This pass is intended to be used as part of a circuit reverse-engineering workflow.\n");
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log("\n");
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log("\n");
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log("The following commands are executed by this command:\n");
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help_script();
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log("\n");
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}
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bool one_pass, no_final_abc;
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virtual void clear_flags() YS_OVERRIDE
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{
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one_pass = false;
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no_final_abc = false;
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}
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virtual void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
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{
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clear_flags();
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++)
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{
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if (args[argidx] == "-one_pass") {
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one_pass = true;
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continue;
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}
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if (args[argidx] == "-no_final_abc") {
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no_final_abc = 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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log_header(design, "Executing recover_reduce.\n");
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log_push();
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run_script(design, "", "");
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log_pop();
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}
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virtual void script() YS_OVERRIDE
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{
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if (!one_pass)
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{
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// Certain structures such as counters seem to work better if we extract only AND
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// and then run a general extract pass.
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// XXX: Why is that? Does this work in general?
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run("abc -g AND");
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run("recover_reduce_core");
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}
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run("abc -g AND,OR,XOR");
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run("recover_reduce_core");
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if (!no_final_abc)
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run("abc");
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run("clean");
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}
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} RecoverReducePass;
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PRIVATE_NAMESPACE_END
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