WIP: fixes path costs Tsw adjustment during lookahead computation

I believe the adjustment of the Tsw value was due to the use of
connection boxes. This is not required anymore as connection boxes are
not being used anymore

Signed-off-by: Alessandro Comodi <[email protected]>

Author: acomodi

vpr/src/base/read_options.cpp

@@ -1912,7 +1912,7 @@ argparse::ArgumentParser create_arg_parser(std::string prog_name, t_options& arg
             " * classic: The classic VPR lookahead (may perform better on un-buffered routing\n"
             "            architectures)\n"
             " * map: A more advanced lookahead which accounts for diverse wire type\n")
-        .default_value("map")
+        .default_value("classic")
         .show_in(argparse::ShowIn::HELP_ONLY);
 
     route_timing_grp.add_argument(args.router_max_convergence_count, "--router_max_convergence_count")

vpr/src/route/router_lookahead_map.cpp

@@ -591,21 +591,6 @@ static bool add_paths(int start_node_ind,
 
     bool new_sample_found = false;
 
-    auto to_tile_type = device_ctx.grid[rr_graph.node_xlow(node)][rr_graph.node_ylow(node)].type;
-    auto to_tile_index = to_tile_type->index;
-
-    auto to_ptc = rr_graph.node_ptc_num(node);
-
-    float site_pin_delay = std::numeric_limits<float>::infinity();
-    if (f_chan_ipins_delays[to_tile_index].size() != 0) {
-        for (const auto& kv : f_chan_ipins_delays[to_tile_index][to_ptc]) {
-            const t_reachable_wire_inf& reachable_wire_inf = kv.second;
-
-            float this_delay = reachable_wire_inf.delay;
-            site_pin_delay = std::min(this_delay, site_pin_delay);
-        }
-    }
-
     // reconstruct the path
     std::vector<int> path;
     for (int i = paths[node_ind].parent; i != start_node_ind; i = paths[i].parent) {
@@ -614,8 +599,6 @@ static bool add_paths(int start_node_ind,
     }
     path.push_back(start_node_ind);
 
-    current.adjust_Tsw(-site_pin_delay);
-
     // add each node along the path subtracting the incremental costs from the current costs
     Entry start_to_here(start_node_ind, UNDEFINED, nullptr);
     int parent = start_node_ind;