diff options
| -rw-r--r-- | ice40/pack.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/ice40/pack.cc b/ice40/pack.cc index 0db78992..921e73e0 100644 --- a/ice40/pack.cc +++ b/ice40/pack.cc @@ -203,6 +203,8 @@ static void pack_carries(Context *ctx) CellInfo *carry_lc = nullptr; if (carry_ci_lc && carry_lcs.find(carry_ci_lc->name) != carry_lcs.end()) { carry_lc = carry_ci_lc; + } else if (ci_const && carry_lcs.size() == 1) { + carry_lc = ctx->cells.at(*(carry_lcs.begin())).get(); } else { // No LC to pack into matching I0/I1, insert a new one std::unique_ptr<CellInfo> created_lc = |