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Add -flowmap to synth and synth_ice40

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This commit is contained in:
Dan Ravensloft 2020-02-28 14:29:57 +00:00
parent 2e8d6ec0b0
commit d7987fec12
2 changed files with 39 additions and 6 deletions
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19
techlibs/common/synth.cc
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@ -78,6 +78,9 @@ struct SynthPass : public ScriptPass
log(" -abc9\n");
log(" use new ABC9 flow (EXPERIMENTAL)\n");
log("\n");
log(" -flowmap\n");
log(" use FlowMap LUT techmapping instead of ABC\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
@ -85,7 +88,7 @@ struct SynthPass : public ScriptPass
}
string top_module, fsm_opts, memory_opts, abc;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare;
bool autotop, flatten, noalumacc, nofsm, noabc, noshare, flowmap;
int lut;
void clear_flags() YS_OVERRIDE
@ -101,6 +104,7 @@ struct SynthPass : public ScriptPass
nofsm = false;
noabc = false;
noshare = false;
flowmap = false;
abc = "abc";
}
@ -167,6 +171,10 @@ struct SynthPass : public ScriptPass
abc = "abc9";
continue;
}
if (args[argidx] == "-flowmap") {
flowmap = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -176,6 +184,8 @@ struct SynthPass : public ScriptPass
if (abc == "abc9" && !lut)
log_cmd_error("ABC9 flow only supported for FPGA synthesis (using '-lut' option)\n");
if (flowmap && !lut)
log_cmd_error("FlowMap is only supported for FPGA synthesis (using '-lut' option)\n");
log_header(design, "Executing SYNTH pass.\n");
log_push();
@ -240,15 +250,20 @@ struct SynthPass : public ScriptPass
{
run("techmap -map +/gate2lut.v", "(if -noabc and -lut)");
run("clean; opt_lut", " (if -noabc and -lut)");
run("flowmap -maxlut K", " (if -flowmap and -lut)");
}
else if (noabc && lut)
{
run(stringf("techmap -map +/gate2lut.v -D LUT_WIDTH=%d", lut));
run("clean; opt_lut");
}
else if (flowmap)
{
run(stringf("flowmap -maxlut %d", lut));
}
run("opt -fast");
if (!noabc) {
if (!noabc && !flowmap) {
#ifdef YOSYS_ENABLE_ABC
if (help_mode)
{