feat: expose -keep_resize_below_overflow with PL_KEEP_RESIZE_BELOW_OVERFLOW

.github/test_sets/test_sets.yml

@@ -16,6 +16,8 @@
     - io_placer
     - test_sram_macro
     - manual_macro_placement_test
+    - name: regs_analog_ctrl_APB
+      config_file: config.yaml
     - name: aes_user_project_wrapper
       test_name: aes_upw_new
       config_file: config.json

Changelog.md

@@ -78,6 +78,7 @@
 * `OpenROAD.GlobalPlacement`
 
   * Added optional variable `PL_ROUTABILITY_MAX_DENSITY_PCT`
+  * Added optional variable `PL_KEEP_RESIZE_BELOW_OVERFLOW`
 
   * Corrected `GPL_CELL_PADDING` to be an integer.
 

openlane/scripts/openroad/gpl.tcl

@@ -73,6 +73,7 @@ set cell_pad_side [expr $::env(GPL_CELL_PADDING) / 2]
 lappend arg_list -pad_right $cell_pad_side
 lappend arg_list -pad_left $cell_pad_side
 lappend arg_list -init_wirelength_coef $::env(PL_WIRE_LENGTH_COEF)
+append_if_exists_argument arg_list PL_KEEP_RESIZE_BELOW_OVERFLOW -keep_resize_below_overflow
 
 log_cmd global_placement {*}$arg_list
 

openlane/steps/openroad.py

@@ -1348,6 +1348,11 @@ class _GlobalPlacement(OpenROADStep):
                 units="sites",
                 pdk=True,
             ),
+            Variable(
+                "PL_KEEP_RESIZE_BELOW_OVERFLOW",
+                Optional[Decimal],
+                "Only applicable when PL_TIME_DRIVEN is enabled. When the overflow is below the set value, timing-driven iterations will retain the resizer changes instead of reverting them. Allowed values are 0 to 1. If not set, a nonzero default value from OpenROAD will be used",
+            ),
         ]
     )