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-rw-r--r--techlibs/ice40/synth_ice40.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc
index c2aed873b..4c4fdf7be 100644
--- a/techlibs/ice40/synth_ice40.cc
+++ b/techlibs/ice40/synth_ice40.cc
@@ -226,7 +226,7 @@ struct SynthIce40Pass : public ScriptPass
if (check_label("coarse"))
{
- run("synth -run coarse");
+ run("synth -lut 4 -run coarse");
}
if (!nobram && check_label("bram", "(skip if -nobram)"))