Set pdn halo to 2 to match tap halo.

If pdn halo > tap halo then you get stripes that can't be connected to
the grid near macros leading to poor ir-drop.

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

flow/platforms/nangate45/pdn.cfg

@@ -1,7 +1,7 @@
 # Floorplan information - core boundary coordinates, std. cell row height,
 # minimum track pitch as defined in LEF
 
-set ::halo 4
+set ::halo 2
 
 # POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
 set ::rails_start_with "POWER" ;

flow/platforms/sky130hd/pdn.cfg

@@ -1,6 +1,7 @@
 # Floorplan information - core boundary coordinates, std. cell row height,
 # minimum track pitch as defined in LEF
 
+set ::halo 2
 
 # POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
 set ::rails_start_with "POWER" ;

flow/platforms/sky130hs/pdn.cfg

@@ -1,6 +1,7 @@
 # Floorplan information - core boundary coordinates, std. cell row height,
 # minimum track pitch as defined in LEF
 
+set ::halo 2
 
 # POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
 set ::rails_start_with "POWER" ;