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Merge pull request #1601 from YosysHQ/eddie/synth_retime

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"abc -dff" to no longer retime by default
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Eddie Hung 2020-01-02 08:46:24 -08:00 • committed by GitHub
commit d6242be802
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13 changed files with 51 additions and 47 deletions
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6
techlibs/xilinx/synth_xilinx.cc
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@ -108,7 +108,7 @@ struct SynthXilinxPass : public ScriptPass
log(" flatten design before synthesis\n");
log("\n");
log(" -retime\n");
log(" run 'abc' with -dff option\n");
log(" run 'abc' with '-dff -D 1' options\n");
log("\n");
log(" -abc9\n");
log(" use new ABC9 flow (EXPERIMENTAL)\n");
@ -550,9 +550,9 @@ struct SynthXilinxPass : public ScriptPass
}
else {
if (nowidelut)
run("abc -luts 2:2,3,6:5" + string(retime ? " -dff" : ""));
run("abc -luts 2:2,3,6:5" + string(retime ? " -dff -D 1" : ""));
else
run("abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff" : ""));
run("abc -luts 2:2,3,6:5,10,20" + string(retime ? " -dff -D 1" : ""));
}
run("clean");