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ice40: Fix carry packer bug

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-09-25 15:52:32 +01:00
parent 09ddcb67d3
commit f1aa7093fe
1 changed files with 2 additions and 2 deletions
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4
ice40/pack.cc
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@ -159,7 +159,7 @@ static void pack_carries(Context *ctx)
exhausted_cells.find(usr.cell->name) == exhausted_cells.end()) {
// This clause stops us double-packing cells
i0_matches.insert(usr.cell->name);
if (!i1_net) {
if (!i1_net && !usr.cell->ports.at(ctx->id("I2")).net) {
// I1 is don't care when disconnected, duplicate I0
i1_matches.insert(usr.cell->name);
}
@ -174,7 +174,7 @@ static void pack_carries(Context *ctx)
exhausted_cells.find(usr.cell->name) == exhausted_cells.end()) {
// This clause stops us double-packing cells
i1_matches.insert(usr.cell->name);
if (!i0_net) {
if (!i0_net && !usr.cell->ports.at(ctx->id("I1")).net) {
// I0 is don't care when disconnected, duplicate I1
i0_matches.insert(usr.cell->name);
}