Fix unextend method for signed constants

diff --git a/passes/pmgen/ice40_dsp.pmg b/passes/pmgen/ice40_dsp.pmg
index 7a01cbd51e299b6d2b72e406b1c0eaa9f46249a4..378f251c09fb6a8f2bcea0e1de861f6fbb874c9e 100644 (file)
--- a/passes/pmgen/ice40_dsp.pmg
+++ b/passes/pmgen/ice40_dsp.pmg
@@ -29,8 +29,7 @@ code sigA sigB sigH
                        if (sig[i] != sig[i-1])
                                break;
                // Do not remove non-const sign bit
-               if (sig[i].wire)
-                       ++i;
+               ++i;
                return sig.extract(0, i);
        };
        sigA = unextend(port(mul, \A));