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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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26
techlibs/ice40/synth_ice40.cc
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@ -96,6 +96,9 @@ struct SynthIce40Pass : 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 (EXPERIMENTAL)\n");
log("\n");
log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
@ -103,7 +106,7 @@ struct SynthIce40Pass : public ScriptPass
}
string top_opt, blif_file, edif_file, json_file, device_opt;
bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr, abc9;
bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr, abc9, flowmap;
int min_ce_use;
void clear_flags() YS_OVERRIDE
@ -123,6 +126,7 @@ struct SynthIce40Pass : public ScriptPass
abc2 = false;
vpr = false;
abc9 = false;
flowmap = false;
device_opt = "hx";
}
@ -214,6 +218,10 @@ struct SynthIce40Pass : public ScriptPass
device_opt = args[++argidx];
continue;
}
if (args[argidx] == "-flowmap") {
flowmap = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -226,6 +234,13 @@ struct SynthIce40Pass : public ScriptPass
if (abc9 && retime)
log_cmd_error("-retime option not currently compatible with -abc9!\n");
if (abc9 && noabc)
log_cmd_error("-abc9 is incompatible with -noabc!\n");
if (abc9 && flowmap)
log_cmd_error("-abc9 is incompatible with -flowmap!\n");
if (flowmap && noabc)
log_cmd_error("-flowmap is incompatible with -noabc!\n");
log_header(design, "Executing SYNTH_ICE40 pass.\n");
log_push();
@ -346,9 +361,12 @@ struct SynthIce40Pass : public ScriptPass
run("ice40_opt", "(only if -abc2)");
}
run("techmap -map +/ice40/latches_map.v");
if (noabc || help_mode) {
run("simplemap", " (only if -noabc)");
run("techmap -map +/gate2lut.v -D LUT_WIDTH=4", "(only if -noabc)");
if (noabc || flowmap || help_mode) {
run("simplemap", " (if -noabc or -flowmap)");
if (noabc || help_mode)
run("techmap -map +/gate2lut.v -D LUT_WIDTH=4", "(only if -noabc)");
if (flowmap || help_mode)
run("flowmap -maxlut 4", "(only if -flowmap)");
}
if (!noabc) {
if (abc9) {