modify 1225

CodeElements/FDPlacement/FD.py

@@ -1055,18 +1055,32 @@ class PBFNetlist:
         target_lx, target_ly, target_ux, target_uy = self.objects[target_macro].GetBBox()
         x_dir = 0
         y_dir = 0
-        if (src_lx >= target_ux or src_ux <= target_lx or src_ly >= target_uy or src_uy <= target_ly):
-            # there is no overlap
-            return None, None
-        else:
+        src_width = src_ux - src_lx
+        src_height = src_uy - src_ly
+        
+        target_width = target_ux - target_lx
+        target_height = target_uy - target_ly
+        
         src_cx = (src_lx + src_ux) / 2.0
         src_cy = (src_ly + src_uy) / 2.0
         target_cx = (target_lx + target_ux) / 2.0
         target_cy = (target_ly + target_uy) / 2.0
+         
+        min_dist = 1e-4
+        x_min_dist = (src_width + target_width) / 2.0
+        y_min_dist = (src_height + target_height) / 2.0
+        if (abs(target_cx - src_cx) > (x_min_dist - min_dist)):
+            # there is no overlap
+            return None, None
+        if (abs(target_cy - src_cy) > (y_min_dist - min_dist)):
+            # there is no overlap
+            return None, None
+       
+        # there is no overlap 
         if (src_cx == target_cx and src_cy == target_cy):
             # fully overlap
-                x_dir = -1.0 / sqrt(2.0)
-                y_dir = -1.0 / sqrt(2.0)
+            x_dir = -1.0
+            y_dir = -1.0
             return x_dir, y_dir
         else:
             x_dir = src_cx - target_cx