Eliminate warnings by sizing O correctly

diff --git a/passes/pmgen/ice40_dsp.cc b/passes/pmgen/ice40_dsp.cc
index ee4e4f5e8df06d2f3096725fc341b8a365d45b5f..3ceffdbf6419027e6482dd1978e40767119b998e 100644 (file)
--- a/passes/pmgen/ice40_dsp.cc
+++ b/passes/pmgen/ice40_dsp.cc
@@ -144,7 +144,11 @@ void create_ice40_dsp(ice40_dsp_pm &pm)
 
        // SB_MAC16 Output Interface
 
-       cell->setPort("\\O", st.sigO);
+       SigSpec O = st.sigO;
+       if (GetSize(O) < 32)
+               O.append(pm.module->addWire(NEW_ID, 32-GetSize(O)));
+
+       cell->setPort("\\O", O);
 
        bool accum = false;
        if (st.addAB) {