assume cube mode for routing chan util estimation in the routing stage

Author: soheilshahrouz

vpr/src/route/route_common.cpp

@@ -481,11 +481,10 @@ void reset_rr_node_route_structs(const t_router_opts& route_opts) {
     auto& route_ctx = g_vpr_ctx.mutable_routing();
     const auto& device_ctx = g_vpr_ctx.device();
     const auto& blk_loc_registry = g_vpr_ctx.placement().blk_loc_registry();
-    const bool cube_bb = g_vpr_ctx.placement().cube_bb;
 
     VTR_ASSERT(route_ctx.rr_node_route_inf.size() == size_t(device_ctx.rr_graph.num_nodes()));
 
-    RoutingChanUtilEstimator routing_chan_util_estimator(blk_loc_registry, cube_bb);
+    RoutingChanUtilEstimator routing_chan_util_estimator(blk_loc_registry);
     const auto [chanx_util, chany_util] = routing_chan_util_estimator.estimate_routing_chan_util();
 
     for (const RRNodeId rr_id : device_ctx.rr_graph.nodes()) {

vpr/src/route/route_utilization.cpp

@@ -5,12 +5,12 @@
 #include "vpr_utils.h"
 #include "route_common.h"
 
-RoutingChanUtilEstimator::RoutingChanUtilEstimator(const BlkLocRegistry& blk_loc_registry, bool cube_bb) {
+RoutingChanUtilEstimator::RoutingChanUtilEstimator(const BlkLocRegistry& blk_loc_registry) {
     placer_state_ = std::make_unique<PlacerState>(/*placement_is_timing_driven=*/false);
     placer_state_->mutable_blk_loc_registry() = blk_loc_registry;
 
     placer_opts_.place_algorithm = e_place_algorithm::BOUNDING_BOX_PLACE;
-    net_cost_handler_ = std::make_unique<NetCostHandler>(placer_opts_, *placer_state_, cube_bb);
+    net_cost_handler_ = std::make_unique<NetCostHandler>(placer_opts_, *placer_state_, /*cube_bb=*/true);
 }
 
 std::pair<vtr::NdMatrix<double, 3>, vtr::NdMatrix<double, 3>> RoutingChanUtilEstimator::estimate_routing_chan_util() {

vpr/src/route/route_utilization.h

@@ -8,13 +8,13 @@
 
 /**
  * @class RoutingChanUtilEstimator
- * @brief This class computes the net bounding boxes and estimates the routing channel utilization
+ * @brief This class computes the net bounding boxes (cube mode) and estimates the routing channel utilization
  * for each CHANX/CHANY channel by smearing the estimated wirelength for each net across all channels
  * within its bounding box.
  */
 class RoutingChanUtilEstimator {
   public:
-    RoutingChanUtilEstimator(const BlkLocRegistry& blk_loc_registry, bool cube_bb);
+    RoutingChanUtilEstimator(const BlkLocRegistry& blk_loc_registry);
 
     std::pair<vtr::NdMatrix<double, 3>, vtr::NdMatrix<double, 3>> estimate_routing_chan_util();