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-rw-r--r--generic/viaduct/fabulous/validity_check.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/viaduct/fabulous/validity_check.cc b/generic/viaduct/fabulous/validity_check.cc
index 30b21f29..81f057c8 100644
--- a/generic/viaduct/fabulous/validity_check.cc
+++ b/generic/viaduct/fabulous/validity_check.cc
@@ -53,7 +53,7 @@ void CellTagger::assign_for(const Context *ctx, const FabricConfig &cfg, const C
const NetInfo *sig = ci->getPort(ctx->idf("I%d", i));
t.comb.lut_inputs[i] = sig ? sig->name : IdString();
}
- t.comb.carry_used = false; // TODO
+ t.comb.carry_used = ci->getPort(id_Ci) || ci->getPort(id_Co); // TODO
t.comb.lut_out = ci->getPort(id_O);
}
if (ci->type.in(id_FABULOUS_FF, id_FABULOUS_LC)) {