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ice40: add synth_ice40 -dff option, support with -abc9

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This commit is contained in:
Eddie Hung 2020-04-13 17:32:21 -07:00
parent 4a10c87ae1
commit fe7965e0ee
2 changed files with 41 additions and 8 deletions
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36
techlibs/ice40/synth_ice40.cc
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@ -71,6 +71,9 @@ struct SynthIce40Pass : public ScriptPass
log(" -noflatten\n");
log(" do not flatten design before synthesis\n");
log("\n");
log(" -dff\n");
log(" run 'abc'/'abc9' with -dff option\n");
log("\n");
log(" -retime\n");
log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
@ -113,7 +116,7 @@ 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, flowmap;
bool nocarry, nodffe, nobram, dsp, flatten, retime, noabc, abc2, vpr, abc9, dff, flowmap;
int min_ce_use;
void clear_flags() YS_OVERRIDE
@ -221,6 +224,10 @@ struct SynthIce40Pass : public ScriptPass
abc9 = true;
continue;
}
if (args[argidx] == "-dff") {
dff = true;
continue;
}
if (args[argidx] == "-device" && argidx+1 < args.size()) {
device_opt = args[++argidx];
continue;
@ -354,7 +361,9 @@ struct SynthIce40Pass : public ScriptPass
run(stringf("dff2dffe -unmap-mince %d", min_ce_use));
run("simplemap t:$dff");
}
run("techmap -D NO_LUT -D NO_ADDER -map +/ice40/cells_map.v");
if ((abc9 && dff) || help_mode)
run("zinit -all", "(-abc9 and -dff only)");
run("techmap -map +/ice40/ff_map.v");
run("opt_expr -mux_undef");
run("simplemap");
run("ice40_ffinit");
@ -387,23 +396,34 @@ struct SynthIce40Pass : public ScriptPass
k = stringf("synth_ice40.abc9.%s.W", device_opt.c_str());
abc9_opts += stringf(" -W %s", RTLIL::constpad.at(k).c_str());
}
if (dff)
abc9_opts += " -dff";
run("abc9 " + abc9_opts);
}
else
run("abc -dress -lut 4", "(skip if -noabc)");
run(stringf("abc -dress -lut 4 %s", dff ? "-dff" : ""), "(skip if -noabc)");
}
run("ice40_wrapcarry -unwrap");
run("techmap -D NO_LUT -map +/ice40/cells_map.v");
run("techmap -map +/ice40/ff_map.v");
run("clean");
run("opt_lut -dlogic SB_CARRY:I0=2:I1=1:CI=0");
}
if (check_label("map_cells"))
{
if (vpr)
run("techmap -D NO_LUT -map +/ice40/cells_map.v");
else
run("techmap -map +/ice40/cells_map.v", "(with -D NO_LUT in vpr mode)");
if (help_mode)
run("techmap [-map +/ice40/ff_map.v] [-map +/ice40/cells_map.v]", "(skip if -abc9; skip if -vpr)");
else if (vpr)
run("techmap -map +/ice40/ff_map.v");
else {
std::string techmap_args;
if (!abc9)
techmap_args += " -map +/ice40/ff_map.v";
if (!vpr)
techmap_args += " -map +/ice40/cells_map.v";
if (!techmap_args.empty())
run("techmap " + techmap_args);
}
run("clean");
}