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-rw-r--r--techlibs/greenpak4/synth_greenpak4.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/techlibs/greenpak4/synth_greenpak4.cc b/techlibs/greenpak4/synth_greenpak4.cc
index 17b5d4782..d9af340d9 100644
--- a/techlibs/greenpak4/synth_greenpak4.cc
+++ b/techlibs/greenpak4/synth_greenpak4.cc
@@ -162,7 +162,7 @@ struct SynthGreenPAK4Pass : public ScriptPass
run("opt -undriven -fine");
run("techmap -map +/techmap.v -map +/greenpak4/cells_latch.v");
run("dfflibmap -prepare -liberty +/greenpak4/gp_dff.lib");
- run("opt -fast");
+ run("opt -fast -noclkinv -noff");
if (retime || help_mode)
run("abc -dff -D 1", "(only if -retime)");
}