mirror of https://github.com/YosysHQ/yosys.git
405 lines
11 KiB
C++
405 lines
11 KiB
C++
/*
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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/register.h"
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#include "kernel/celltypes.h"
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#include "kernel/rtlil.h"
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#include "kernel/log.h"
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USING_YOSYS_NAMESPACE
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PRIVATE_NAMESPACE_BEGIN
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struct SynthIce40Pass : public ScriptPass
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{
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SynthIce40Pass() : ScriptPass("synth_ice40", "synthesis for iCE40 FPGAs") { }
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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(" synth_ice40 [options]\n");
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log("\n");
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log("This command runs synthesis for iCE40 FPGAs.\n");
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log("\n");
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log(" -device < hx | lp | u >\n");
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log(" relevant only for '-abc9' flow, optimise timing for the specified device.\n");
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log(" default: hx\n");
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log("\n");
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log(" -top <module>\n");
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log(" use the specified module as top module\n");
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log("\n");
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log(" -blif <file>\n");
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log(" write the design to the specified BLIF file. writing of an output file\n");
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log(" is omitted if this parameter is not specified.\n");
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log("\n");
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log(" -edif <file>\n");
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log(" write the design to the specified EDIF file. writing of an output file\n");
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log(" is omitted if this parameter is not specified.\n");
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log("\n");
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log(" -json <file>\n");
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log(" write the design to the specified JSON file. writing of an output file\n");
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log(" is omitted if this parameter is not specified.\n");
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log("\n");
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log(" -run <from_label>:<to_label>\n");
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log(" only run the commands between the labels (see below). an empty\n");
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log(" from label is synonymous to 'begin', and empty to label is\n");
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log(" synonymous to the end of the command list.\n");
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log("\n");
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log(" -noflatten\n");
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log(" do not flatten design before synthesis\n");
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log("\n");
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log(" -retime\n");
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log(" run 'abc' with -dff option\n");
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log("\n");
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log(" -nocarry\n");
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log(" do not use SB_CARRY cells in output netlist\n");
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log("\n");
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log(" -nodffe\n");
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log(" do not use SB_DFFE* cells in output netlist\n");
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log("\n");
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log(" -dffe_min_ce_use <min_ce_use>\n");
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log(" do not use SB_DFFE* cells if the resulting CE line would go to less\n");
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log(" than min_ce_use SB_DFFE* in output netlist\n");
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log("\n");
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log(" -nobram\n");
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log(" do not use SB_RAM40_4K* cells in output netlist\n");
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log("\n");
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log(" -dsp\n");
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log(" use iCE40 UltraPlus DSP cells for large arithmetic\n");
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log("\n");
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log(" -noabc\n");
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log(" use built-in Yosys LUT techmapping instead of abc\n");
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log("\n");
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log(" -abc2\n");
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log(" run two passes of 'abc' for slightly improved logic density\n");
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log("\n");
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log(" -vpr\n");
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log(" generate an output netlist (and BLIF file) suitable for VPR\n");
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log(" (this feature is experimental and incomplete)\n");
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log("\n");
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log(" -abc9\n");
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log(" use new ABC9 flow (EXPERIMENTAL)\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 synthesis command:\n");
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help_script();
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log("\n");
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}
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string top_opt, blif_file, edif_file, json_file, abc, device_opt;
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bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr;
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int min_ce_use;
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void clear_flags() YS_OVERRIDE
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{
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top_opt = "-auto-top";
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blif_file = "";
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edif_file = "";
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json_file = "";
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nocarry = false;
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nodffe = false;
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min_ce_use = -1;
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nobram = false;
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dsp = false;
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flatten = true;
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retime = false;
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noabc = false;
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abc2 = false;
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vpr = false;
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abc = "abc";
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device_opt = "hx";
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}
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void execute(std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
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{
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string run_from, run_to;
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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] == "-top" && argidx+1 < args.size()) {
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top_opt = "-top " + args[++argidx];
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continue;
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}
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if (args[argidx] == "-blif" && argidx+1 < args.size()) {
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blif_file = args[++argidx];
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continue;
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}
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if (args[argidx] == "-edif" && argidx+1 < args.size()) {
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edif_file = args[++argidx];
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continue;
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}
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if (args[argidx] == "-json" && argidx+1 < args.size()) {
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json_file = args[++argidx];
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continue;
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}
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if (args[argidx] == "-run" && argidx+1 < args.size()) {
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size_t pos = args[argidx+1].find(':');
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if (pos == std::string::npos)
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break;
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run_from = args[++argidx].substr(0, pos);
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run_to = args[argidx].substr(pos+1);
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continue;
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}
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if (args[argidx] == "-flatten") {
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flatten = true;
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continue;
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}
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if (args[argidx] == "-noflatten") {
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flatten = false;
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continue;
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}
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if (args[argidx] == "-retime") {
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retime = true;
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continue;
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}
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if (args[argidx] == "-relut") {
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// removed, opt_lut is always run
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continue;
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}
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if (args[argidx] == "-nocarry") {
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nocarry = true;
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continue;
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}
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if (args[argidx] == "-nodffe") {
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nodffe = true;
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continue;
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}
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if (args[argidx] == "-dffe_min_ce_use" && argidx+1 < args.size()) {
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min_ce_use = std::stoi(args[++argidx]);
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continue;
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}
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if (args[argidx] == "-nobram") {
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nobram = true;
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continue;
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}
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if (args[argidx] == "-dsp") {
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dsp = true;
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continue;
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}
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if (args[argidx] == "-noabc") {
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noabc = true;
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continue;
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}
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if (args[argidx] == "-abc2") {
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abc2 = true;
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continue;
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}
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if (args[argidx] == "-vpr") {
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vpr = true;
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continue;
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}
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if (args[argidx] == "-abc9") {
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abc = "abc9";
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continue;
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}
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if (args[argidx] == "-device" && argidx+1 < args.size()) {
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device_opt = 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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if (!design->full_selection())
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log_cmd_error("This command only operates on fully selected designs!\n");
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if (device_opt != "hx" && device_opt != "lp" && device_opt !="u")
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log_cmd_error("Invalid or no device specified: '%s'\n", device_opt.c_str());
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if (abc == "abc9" && retime)
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log_cmd_error("-retime option not currently compatible with -abc9!\n");
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log_header(design, "Executing SYNTH_ICE40 pass.\n");
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log_push();
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run_script(design, run_from, run_to);
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log_pop();
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}
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void script() YS_OVERRIDE
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{
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if (check_label("begin"))
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{
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run("read_verilog -icells -lib -D_ABC +/ice40/cells_sim.v");
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run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
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run("proc");
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}
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if (check_label("flatten", "(unless -noflatten)"))
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{
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if (flatten) {
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run("flatten");
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run("tribuf -logic");
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run("deminout");
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}
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}
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if (check_label("coarse"))
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{
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run("opt_expr");
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run("opt_clean");
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run("check");
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run("opt");
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run("wreduce");
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run("peepopt");
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run("opt_clean");
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run("share");
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run("techmap -map +/cmp2lut.v -D LUT_WIDTH=4");
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run("opt_expr");
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run("opt_clean");
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if (help_mode || dsp) {
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run("techmap -map +/mul2dsp.v -map +/ice40/dsp_map.v -D DSP_A_MAXWIDTH=16 -D DSP_B_MAXWIDTH=16 -D DSP_A_MINWIDTH=2 -D DSP_B_MINWIDTH=2 -D DSP_Y_MINWIDTH=11 -D DSP_NAME=$__MUL16X16", "(if -dsp)");
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run("opt_expr -fine", " (if -dsp)");
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run("wreduce", " (if -dsp)");
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run("ice40_dsp", " (if -dsp)");
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run("chtype -set $mul t:$__soft_mul","(if -dsp)");
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}
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run("alumacc");
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run("opt");
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run("fsm");
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run("opt -fast");
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run("memory -nomap");
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run("opt_clean");
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}
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if (!nobram && check_label("map_bram", "(skip if -nobram)"))
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{
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run("memory_bram -rules +/ice40/brams.txt");
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run("techmap -map +/ice40/brams_map.v");
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run("ice40_braminit");
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}
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if (check_label("map_ffram"))
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{
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run("opt -fast -mux_undef -undriven -fine");
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run("memory_map");
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run("opt -undriven -fine");
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}
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if (check_label("map_gates"))
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{
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if (nocarry)
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run("techmap");
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else
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run("techmap -map +/techmap.v -map +/ice40/arith_map.v" + std::string(abc == "abc9" ? " -D _ABC" : ""));
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if (retime || help_mode)
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run(abc + " -dff", "(only if -retime)");
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run("ice40_opt");
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}
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if (check_label("map_ffs"))
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{
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run("dffsr2dff");
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if (!nodffe)
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run("dff2dffe -direct-match $_DFF_*");
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if (min_ce_use >= 0) {
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run("opt_merge");
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run(stringf("dff2dffe -unmap-mince %d", min_ce_use));
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}
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run("techmap -D NO_LUT -map +/ice40/cells_map.v");
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run("opt_expr -mux_undef");
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run("simplemap");
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run("ice40_ffinit");
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run("ice40_ffssr");
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run("ice40_opt -full");
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}
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if (check_label("map_luts"))
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{
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if (abc2 || help_mode) {
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run(abc, " (only if -abc2)");
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run("ice40_opt", "(only if -abc2)");
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}
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run("techmap -map +/ice40/latches_map.v");
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if (noabc || help_mode) {
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run("simplemap", " (only if -noabc)");
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run("techmap -map +/gate2lut.v -D LUT_WIDTH=4", "(only if -noabc)");
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}
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if (!noabc) {
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if (abc == "abc9") {
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int wire_delay;
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if (device_opt == "lp")
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wire_delay = 400;
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else if (device_opt == "u")
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wire_delay = 750;
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else
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wire_delay = 250;
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run(abc + stringf(" -W %d -lut +/ice40/abc_%s.lut -box +/ice40/abc_%s.box", wire_delay, device_opt.c_str(), device_opt.c_str()), "(skip if -noabc)");
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run("techmap -D NO_LUT -D _ABC -map +/ice40/cells_map.v");
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}
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else
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run(abc + " -dress -lut 4", "(skip if -noabc)");
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}
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run("clean");
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run("ice40_unlut");
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run("opt_lut -dlogic SB_CARRY:I0=2:I1=1:CI=0");
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}
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if (check_label("map_cells"))
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{
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if (vpr)
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run("techmap -D NO_LUT -map +/ice40/cells_map.v");
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else
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run("techmap -map +/ice40/cells_map.v", "(with -D NO_LUT in vpr mode)");
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run("clean");
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}
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if (check_label("check"))
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{
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run("hierarchy -check");
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run("stat");
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run("check -noinit");
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}
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if (check_label("blif"))
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{
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if (!blif_file.empty() || help_mode) {
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if (vpr || help_mode) {
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run(stringf("opt_clean -purge"),
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" (vpr mode)");
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run(stringf("write_blif -attr -cname -conn -param %s",
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help_mode ? "<file-name>" : blif_file.c_str()),
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" (vpr mode)");
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}
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if (!vpr)
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run(stringf("write_blif -gates -attr -param %s",
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help_mode ? "<file-name>" : blif_file.c_str()),
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" (non-vpr mode)");
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}
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}
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if (check_label("edif"))
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{
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if (!edif_file.empty() || help_mode)
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run(stringf("write_edif %s", help_mode ? "<file-name>" : edif_file.c_str()));
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}
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if (check_label("json"))
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{
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if (!json_file.empty() || help_mode)
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run(stringf("write_json %s", help_mode ? "<file-name>" : json_file.c_str()));
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}
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}
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} SynthIce40Pass;
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PRIVATE_NAMESPACE_END
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