Merge pull request #2937 from verilog-to-routing/print_initial_placement_wl

Initial Placement Wirelength Est.

Author: amin1377

vpr/src/place/net_cost_handler.cpp

@@ -1625,6 +1625,20 @@ void NetCostHandler::recompute_costs_from_scratch(const PlaceDelayModel* delay_m
     }
 }
 
+double NetCostHandler::get_total_wirelength_estimate() const {
+    const auto& clb_nlist = g_vpr_ctx.clustering().clb_nlist;
+    const auto& bb_coords = placer_state_.move().bb_coords;
+
+    double estimated_wirelength = 0.0;
+    for (ClusterNetId net_id : clb_nlist.nets()) { /* for each net ... */
+        if (!clb_nlist.net_is_ignored(net_id)) {   /* Do only if not ignored. */
+            estimated_wirelength += get_net_wirelength_estimate(net_id, bb_coords[net_id]);
+        }
+    }
+
+    return estimated_wirelength;
+}
+
 void NetCostHandler::set_ts_bb_coord_(const ClusterNetId net_id) {
     auto& place_move_ctx = placer_state_.mutable_move();
     if (cube_bb_) {

vpr/src/place/net_cost_handler.h

@@ -121,6 +121,11 @@ class NetCostHandler {
                                       const PlacerCriticalities* criticalities,
                                       t_placer_costs& costs);
 
+    /**
+     * @brief Get the total wirelength estimate of all nets.
+     */
+    double get_total_wirelength_estimate() const;
+
   private:
     ///@brief Specifies whether the bounding box is computed using cube method or per-layer method.
     bool cube_bb_;

vpr/src/place/placement_log_printer.cpp

@@ -179,6 +179,9 @@ void PlacementLogPrinter::print_initial_placement_stats() const {
     VTR_LOG("Initial placement cost: %g bb_cost: %g td_cost: %g\n",
             costs.cost, costs.bb_cost, costs.timing_cost);
 
+    double wirelength = placer_.net_cost_handler_.get_total_wirelength_estimate();
+    VTR_LOG("Initial placement BB estimate of wirelength: %g\n", wirelength);
+
     if (placer_.noc_opts_.noc) {
         VTR_ASSERT(placer_.noc_cost_handler_.has_value());
         placer_.noc_cost_handler_->print_noc_costs("Initial NoC Placement Costs", costs, placer_.noc_opts_);