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https://github.com/YosysHQ/yosys
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fabulous: improvements to the pass
Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat
myrtle
parent
e3f9ff2679
commit
f111bbdf40
13 changed files with 335 additions and 134 deletions
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@ -44,6 +44,18 @@ struct SynthPass : public ScriptPass
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log(" -auto-top\n");
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log(" automatically determine the top of the design hierarchy\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(" -lut <k>\n");
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log(" perform synthesis for a k-LUT architecture (default 4).\n");
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log("\n");
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@ -63,6 +75,20 @@ struct SynthPass : public ScriptPass
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log(" do not run 'alumacc' pass. i.e. keep arithmetic operators in\n");
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log(" their direct form ($add, $sub, etc.).\n");
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log("\n");
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log(" -noregfile\n");
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log(" do not map register files\n");
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log("\n");
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log(" -iopad\n");
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log(" enable automatic insertion of IO buffers (otherwise a wrapper\n");
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log(" with manually inserted and constrained IO should be used.)\n");
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log("\n");
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log(" -complex-dff\n");
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log(" enable support for FFs with enable and synchronous SR (must also be\n");
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log(" supported by the target fabric.)\n");
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log("\n");
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log(" -noflatten\n");
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log(" do not flatten design after elaboration\n");
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log("\n");
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log(" -nordff\n");
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log(" passed to 'memory'. prohibits merging of FFs into memory read ports\n");
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log("\n");
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@ -85,8 +111,8 @@ struct SynthPass : public ScriptPass
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log("\n");
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}
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string top_module, plib, fsm_opts, memory_opts;
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bool autotop, forvpr, noalumacc, nofsm, noshare;
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string top_module, json_file, blif_file, plib, fsm_opts, memory_opts;
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bool autotop, forvpr, noalumacc, nofsm, noshare, noregfile, iopad, complexdff, flatten;
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int lut;
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void clear_flags() override
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@ -99,6 +125,11 @@ struct SynthPass : public ScriptPass
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noalumacc = false;
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nofsm = false;
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noshare = false;
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iopad = false;
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complexdff = false;
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flatten = true;
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json_file = "";
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blif_file = "";
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}
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void execute(std::vector<std::string> args, RTLIL::Design *design) override
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@ -113,6 +144,14 @@ struct SynthPass : public ScriptPass
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top_module = 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] == "-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] == "-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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@ -160,6 +199,22 @@ struct SynthPass : public ScriptPass
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memory_opts += " -no-rw-check";
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continue;
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}
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if (args[argidx] == "-noregfile") {
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noregfile = true;
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continue;
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}
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if (args[argidx] == "-iopad") {
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iopad = true;
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continue;
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}
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if (args[argidx] == "-complex-dff") {
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complexdff = 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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break;
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}
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extra_args(args, argidx, design);
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@ -178,65 +233,131 @@ struct SynthPass : public ScriptPass
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void script() override
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{
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if (plib.empty())
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run("read_verilog -lib +/fabulous/prims.v");
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run(stringf("read_verilog %s -lib +/fabulous/prims.v", complexdff ? "-DCOMPLEX_DFF" : ""));
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else
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run("read_verilog -lib " + plib);
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if (top_module.empty()) {
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if (autotop)
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run("hierarchy -check -auto-top");
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else
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run("hierarchy -check");
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} else
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run(stringf("hierarchy -check -top %s", top_module.c_str()));
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if (check_label("begin")) {
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if (top_module.empty()) {
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if (autotop)
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run("hierarchy -check -auto-top");
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else
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run("hierarchy -check");
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} else
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run(stringf("hierarchy -check -top %s", top_module.c_str()));
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run("proc");
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}
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run("proc");
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run("tribuf -logic");
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run("deminout");
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// synth pass
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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 -nodffe -nosdff");
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if (!nofsm)
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run("fsm" + fsm_opts, " (unless -nofsm)");
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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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if (help_mode)
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run("techmap -map +/cmp2lut.v -map +/cmp2lcu.v", " (if -lut)");
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else if (lut)
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run(stringf("techmap -map +/cmp2lut.v -map +/cmp2lcu.v -D LUT_WIDTH=%d", lut));
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if (!noalumacc)
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run("alumacc", " (unless -noalumacc)");
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if (!noshare)
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run("share", " (unless -noshare)");
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run("opt");
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run("memory -nomap" + memory_opts);
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run("opt_clean");
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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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// RegFile extraction
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if (check_label("coarse")) {
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run("tribuf -logic");
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run("deminout");
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run("memory_libmap -lib +/fabulous/ram_regfile.txt");
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run("techmap -map +/fabulous/regfile_map.v");
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run("opt -fast -mux_undef -undriven -fine");
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// synth pass
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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 -nodffe -nosdff");
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if (!nofsm)
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run("fsm" + fsm_opts, " (unless -nofsm)");
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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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if (help_mode)
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run("techmap -map +/cmp2lut.v -map +/cmp2lcu.v", " (if -lut)");
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else if (lut)
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run(stringf("techmap -map +/cmp2lut.v -map +/cmp2lcu.v -D LUT_WIDTH=%d", lut));
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if (!noalumacc)
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run("alumacc", " (unless -noalumacc)");
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if (!noshare)
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run("share", " (unless -noshare)");
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run("opt");
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run("memory -nomap" + memory_opts);
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run("opt_clean");
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}
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run("memory_map");
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run("opt -undriven -fine");
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run("opt -full");
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run("techmap -map +/techmap.v");
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run("opt -fast");
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run("dfflegalize -cell $_DFF_P_ 0 -cell $_DLATCH_?_ x");
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run("techmap -map +/fabulous/latches_map.v");
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run("abc -lut $LUT_K -dress");
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run("clean");
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if (!forvpr)
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run("techmap -D LUT_K=$LUT_K -map +/fabulous/cells_map.v");
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run("clean");
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run("hierarchy -check");
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run("stat");
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if (check_label("map_ram")) {
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// RegFile extraction
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if (!noregfile) {
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run("memory_libmap -lib +/fabulous/ram_regfile.txt");
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run("techmap -map +/fabulous/regfile_map.v");
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}
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}
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if (check_label("map_ffram")) {
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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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run("opt -full");
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run("techmap -map +/techmap.v");
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run("opt -fast");
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}
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if (check_label("map_iopad", "(if -iopad)")) {
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if (iopad) {
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run("opt -full");
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run("iopadmap -bits -outpad $__FABULOUS_OBUF I:PAD -inpad $__FABULOUS_IBUF O:PAD "
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"-toutpad IO_1_bidirectional_frame_config_pass ~T:I:PAD "
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"-tinoutpad IO_1_bidirectional_frame_config_pass ~T:O:I:PAD A:top", "(skip if '-noiopad')");
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run("techmap -map +/fabulous/io_map.v");
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}
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}
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if (check_label("map_ffs")) {
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if (complexdff) {
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run("dfflegalize -cell $_DFF_P_ 0 -cell $_SDFF_PP?_ 0 -cell $_SDFFCE_PP?P_ 0 -cell $_DLATCH_?_ x", "with -complex-dff");
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} else {
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run("dfflegalize -cell $_DFF_P_ 0 -cell $_DLATCH_?_ x", "without -complex-dff");
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}
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run("techmap -map +/fabulous/latches_map.v");
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run("techmap -map +/fabulous/ff_map.v");
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run("clean");
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}
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if (check_label("map_luts")) {
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run(stringf("abc -lut %d -dress", lut));
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run("clean");
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}
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if (check_label("map_cells")) {
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if (!forvpr)
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run(stringf("techmap -D LUT_K=%d -map +/fabulous/cells_map.v", lut));
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run("clean");
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}
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if (check_label("check")) {
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run("hierarchy -check");
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run("stat");
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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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{
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run("opt_clean -purge");
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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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}
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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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} SynthPass;
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