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-rw-r--r--techlibs/sf2/synth_sf2.cc12
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");
}