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| author | Tristan Gingold <tristan.gingold@cern.ch> | 2021-11-18 08:43:20 +0100 |
|---|---|---|
| committer | Tristan Gingold <tristan.gingold@cern.ch> | 2022-08-31 08:40:43 +0200 |
| commit | 4543751a773c770e444ab3c6acc586f6a9b4a510 (patch) | |
| tree | 293517bf735dccef51f6b9f8f511235060f322ef | |
| parent | 7117817dbe7edebc9ba63a9810eb775c90b6ece6 (diff) | |
| download | yosys-4543751a773c770e444ab3c6acc586f6a9b4a510.tar.gz yosys-4543751a773c770e444ab3c6acc586f6a9b4a510.tar.bz2 yosys-4543751a773c770e444ab3c6acc586f6a9b4a510.zip | |
synth_sf2: add -discard-ffinit option to discard ff initial value
sf2 ff have no initial values, but some IP cores use initial values.
In order to use those cores on sf2, it is required to discard the
initial value (to be carefully used).
| -rw-r--r-- | techlibs/sf2/synth_sf2.cc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/techlibs/sf2/synth_sf2.cc b/techlibs/sf2/synth_sf2.cc index f78b4f012..fcc0a5e23 100644 --- a/techlibs/sf2/synth_sf2.cc +++ b/techlibs/sf2/synth_sf2.cc @@ -66,6 +66,9 @@ struct SynthSf2Pass : public ScriptPass log(" -clkbuf\n"); log(" insert direct PAD->global_net buffers\n"); log("\n"); + log(" -discard-ffinit\n"); + log(" discard FF init value instead of emitting an error\n"); + log("\n"); log(" -retime\n"); log(" run 'abc' with '-dff -D 1' options\n"); log("\n"); @@ -76,7 +79,7 @@ struct SynthSf2Pass : public ScriptPass } string top_opt, edif_file, vlog_file, json_file; - bool flatten, retime, iobs, clkbuf; + bool flatten, retime, iobs, clkbuf, discard_ffinit; void clear_flags() override { @@ -88,6 +91,7 @@ struct SynthSf2Pass : public ScriptPass retime = false; iobs = true; clkbuf = false; + discard_ffinit = false; } void execute(std::vector<std::string> args, RTLIL::Design *design) override @@ -138,6 +142,10 @@ struct SynthSf2Pass : public ScriptPass clkbuf = true; continue; } + if (args[argidx] == "-discard-ffinit") { + discard_ffinit = true; + continue; + } break; } extra_args(args, argidx, design); @@ -171,6 +179,8 @@ struct SynthSf2Pass : public ScriptPass if (check_label("coarse")) { + if (discard_ffinit || help_mode) + run("attrmap -remove init", "(only if -discard-ffinit)"); run("synth -run coarse"); } |