synth: only techmap cmp2{lut,lcu} if -lut

diff --git a/techlibs/common/synth.cc b/techlibs/common/synth.cc
index 513702357bc164414a513c1e2c7e36dd1dc1a338..d6dffdd7f5c50c7d581349c26db434d0616b676b 100644 (file)
--- a/techlibs/common/synth.cc
+++ b/techlibs/common/synth.cc
@@ -226,7 +226,7 @@ struct SynthPass : public ScriptPass
                        run("opt_clean");
                        if (help_mode)
                                run("techmap -map +/cmp2lut.v -map +/cmp2lcu.v", " (if -lut)");
-                       else
+                       else if (lut)
                                run(stringf("techmap -map +/cmp2lut.v -map +/cmp2lcu.v -D LUT_WIDTH=%d", lut));
                        if (!noalumacc)
                                run("alumacc", "  (unless -noalumacc)");