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-rw-r--r--techlibs/ecp5/synth_ecp5.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/techlibs/ecp5/synth_ecp5.cc b/techlibs/ecp5/synth_ecp5.cc
index ab740ea0d..317947978 100644
--- a/techlibs/ecp5/synth_ecp5.cc
+++ b/techlibs/ecp5/synth_ecp5.cc
@@ -324,6 +324,8 @@ struct SynthEcp5Pass : public ScriptPass
if (abc9) {
run("read_verilog -icells -lib -specify +/abc9_model.v +/ecp5/abc9_model.v");
+ if (!help_mode && !active_design->scratchpad.count("abc9.nomfs"))
+ active_design->scratchpad_set_bool("abc9.nomfs", true);
if (nowidelut)
run("abc9 -maxlut 4 -W 200");
else