From: Eddie Hung <eddie@fpgeh.com>
Date: Sat, 31 Aug 2019 03:15:09 +0000 (-0700)
Subject: Recognise built-in types (e.g. $_DFF_*)
X-Git-Tag: working-ls180~1081
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f76cb584940fa3217de28febdb103443b8a8cf37;p=yosys.git

Recognise built-in types (e.g. $_DFF_*)
---

diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc
index 77d0e94c2..e1b84236d 100644
--- a/backends/aiger/xaiger.cc
+++ b/backends/aiger/xaiger.cc
@@ -261,11 +261,12 @@ struct XAigerWriter
 				}
 			}
 			else {
-				bool cell_known = cell->known();
+				bool cell_known = inst_module || cell->known();
 				for (const auto &c : cell->connections()) {
 					if (c.second.is_fully_const()) continue;
-					auto is_input = !cell_known || cell->input(c.first);
-					auto is_output = !cell_known || cell->output(c.first);
+					auto port_wire = inst_module ? inst_module->wire(c.first) : nullptr;
+					auto is_input = (port_wire && port_wire->port_input) || !cell_known || cell->input(c.first);
+					auto is_output = (port_wire && port_wire->port_output) || !cell_known || cell->output(c.first);
 					if (!is_input && !is_output)
 						log_error("Connection '%s' on cell '%s' (type '%s') not recognised!\n", log_id(c.first), log_id(cell), log_id(cell->type));