[VPR] Use standard API to get the number of pins per block in a subtile

Author: tangxifan

vpr/src/util/vpr_utils.cpp

@@ -2354,17 +2354,14 @@ int get_post_placement_physical_pin(t_physical_tile_type_ptr physical_tile,
     /* Find the relative capacity of the logical_block in this sub tile */
     int relative_capacity = sub_tile_capacity - physical_tile->sub_tiles[sub_tile_index].capacity.low;
 
-    /* Find the maximum number of pins among all the logical blocks in the equivalent site list 
-     * of the sub tile. Otherwise, the current logical block may have smaller number of pins
+    /* Find the number of pins per block in the equivalent site list
+     * of the sub tile. Otherwise, the current logical block may have smaller/larger number of pins
      * than other logical blocks that can be placed in the sub-tile. This will lead to an error
      * when computing the pin index!
      */
-    int max_logical_block_num_pins = logical_block->pb_type->num_pins;
-    for (t_logical_block_type_ptr eq_lb : physical_tile->sub_tiles[sub_tile_index].equivalent_sites) {
-        max_logical_block_num_pins = std::max(max_logical_block_num_pins, eq_lb->pb_type->num_pins);
-    }
+    int block_num_pins = physical_tile->sub_tiles[sub_tile_index].num_phy_pins / physical_tile->sub_tiles[sub_tile_index].capacity.total();
 
-    return relative_capacity * max_logical_block_num_pins
+    return relative_capacity * block_num_pins
            + physical_tile->sub_tiles[sub_tile_index].sub_tile_to_tile_pin_indices[sub_tile_physical_pin];
 }