consider CHANZ nodes in map lookahead

Author: soheilshahrouz

vpr/src/place/net_cost_handler.cpp

@@ -20,8 +20,6 @@
  * To get a delay estimation of a connection (from a source to a sink), first, dx and dy between these two points should be calculated,
  * and these two numbers are the indices to access this 2D array. By default, the placement delay model is created by iterating over the router lookahead
  * to get the minimum cost for each dx and dy.
- *
- * @date July 12, 2024
  */
 #include "net_cost_handler.h"
 

vpr/src/route/router_lookahead/router_lookahead_map.cpp

@@ -175,13 +175,14 @@ float MapLookahead::get_expected_cost(RRNodeId current_node, RRNodeId target_nod
     if (is_flat_) {
         return get_expected_cost_flat_router(current_node, target_node, params, R_upstream);
     } else {
-        if (from_rr_type == e_rr_type::CHANX || from_rr_type == e_rr_type::CHANY || from_rr_type == e_rr_type::SOURCE || from_rr_type == e_rr_type::OPIN) {
+        if (from_rr_type == e_rr_type::CHANX || from_rr_type == e_rr_type::CHANY || from_rr_type == e_rr_type::CHANZ
+            || from_rr_type == e_rr_type::SOURCE || from_rr_type == e_rr_type::OPIN) {
             // Get the total cost using the combined delay and congestion costs
             auto [delay_cost, cong_cost] = get_expected_delay_and_cong(current_node, target_node, params, R_upstream);
             return delay_cost + cong_cost;
-        } else if (from_rr_type == e_rr_type::IPIN) { /* Change if you're allowing route-throughs */
+        } else if (from_rr_type == e_rr_type::IPIN) { // Change if you're allowing route-throughs
             return (device_ctx.rr_indexed_data[RRIndexedDataId(SINK_COST_INDEX)].base_cost);
-        } else { /* Change this if you want to investigate route-throughs */
+        } else { // Change this if you want to investigate route-throughs
             return (0.);
         }
     }