Fixed write rr_graph GSB writing

openfpga/src/annotation/write_xml_device_rr_gsb.cpp

@@ -50,15 +50,24 @@ static void write_rr_gsb_ipin_connection_to_xml(std::fstream& fp,
         continue;
       }
 
-      enum e_side chan_side = rr_gsb.get_cb_chan_side(gsb_side);
-      SideManager chan_side_manager(chan_side);
-
-      /* For channel node, we do not know the node direction
-       * But we are pretty sure it is either IN_PORT or OUT_PORT
-       * So we just try and find what is valid
-       */
-      int driver_node_index =
-        rr_gsb.get_chan_node_index(chan_side, driver_node);
+      e_side chan_side;
+      SideManager chan_side_manager = SideManager();
+      int driver_node_index = -1;
+
+      for (size_t side = 0; side < NUM_2D_SIDES; ++side) {
+            chan_side_manager.set_side(side);
+            chan_side = chan_side_manager.get_side();
+            for (PORTS port_direc : {IN_PORT, OUT_PORT}) {
+                /* For channel node, we do not know the node direction
+                * But we are pretty sure it is either IN_PORT or OUT_PORT
+                * So we just try and find what is valid
+                */
+                driver_node_index = rr_gsb.get_chan_node_index(chan_side, driver_node);
+                if (-1 != driver_node_index) { break; }
+            }
+            if (-1 != driver_node_index) { break;}
+        }
+
       /* We must have a valide node index */
       VTR_ASSERT(-1 != driver_node_index);