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nexus: Improve error reporting for illegal carry chains

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Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2023-12-18 12:18:22 +00:00 committed by myrtle
parent 535709a9a9
commit 56587859d3
1 changed files with 7 additions and 1 deletions
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8
nexus/pack.cc
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@ -1318,8 +1318,14 @@ struct NexusPacker
CellInfo *ci = cell.second.get(); CellInfo *ci = cell.second.get();
if (ci->type != id_CCU2) if (ci->type != id_CCU2)
continue; continue;
if (ci->getPort(id_CIN) != nullptr) NetInfo *cin = ci->getPort(id_CIN);
if (cin) {
if (cin->driver.cell && cin->driver.cell->type != id_CCU2) {
log_error("CCU2 '%s' CIN net '%s' driven by non-CCU2 cell '%s'.\n",
ctx->nameOf(ci), ctx->nameOf(cin), ctx->nameOf(cin->driver.cell));
}
continue; continue;
}
roots.push_back(ci); roots.push_back(ci);
} }
for (CellInfo *root : roots) { for (CellInfo *root : roots) {