diff options
Diffstat (limited to 'passes/techmap/flatten.cc')
| -rw-r--r-- | passes/techmap/flatten.cc | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/passes/techmap/flatten.cc b/passes/techmap/flatten.cc index 08978f446..f35b7ff60 100644 --- a/passes/techmap/flatten.cc +++ b/passes/techmap/flatten.cc @@ -180,12 +180,15 @@ struct FlattenWorker RTLIL::Wire *tpl_wire = tpl->wire(port_name); RTLIL::SigSig new_conn; + bool is_signed = false; if (tpl_wire->port_output && !tpl_wire->port_input) { new_conn.first = port_it.second; new_conn.second = tpl_wire; + is_signed = tpl_wire->is_signed; } else if (!tpl_wire->port_output && tpl_wire->port_input) { new_conn.first = tpl_wire; new_conn.second = port_it.second; + is_signed = new_conn.second.is_wire() && new_conn.second.as_wire()->is_signed; } else { SigSpec sig_tpl = tpl_wire, sig_mod = port_it.second; for (int i = 0; i < GetSize(sig_tpl) && i < GetSize(sig_mod); i++) { @@ -204,11 +207,11 @@ struct FlattenWorker if (new_conn.second.size() > new_conn.first.size()) new_conn.second.remove(new_conn.first.size(), new_conn.second.size() - new_conn.first.size()); if (new_conn.second.size() < new_conn.first.size()) - new_conn.second.append(RTLIL::SigSpec(RTLIL::State::S0, new_conn.first.size() - new_conn.second.size())); + new_conn.second.extend_u0(new_conn.first.size(), is_signed); log_assert(new_conn.first.size() == new_conn.second.size()); if (sigmap(new_conn.first).has_const()) - log_error("Mismatch in directionality for cell port %s.%s.%s: %s <= %s\n", + log_error("Cell port %s.%s.%s is driving constant bits: %s <= %s\n", log_id(module), log_id(cell), log_id(port_it.first), log_signal(new_conn.first), log_signal(new_conn.second)); module->connect(new_conn); |