OpenROAD.IOPlacement: Add annealing FP_IO_MODE (#290)

* `OpenROAD.IOPlacement`, `OpenROAD.GlobalPlacementSkipIO` * Added new value for `FP_IO_MODE` which places I/O pins by annealing
efabless · Dec 11, 2023 · 7b57e30 · 7b57e30
1 parent ab82054
commit 7b57e30
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Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/openlane/scripts/openroad/ioplacer.tcl b/openlane/scripts/openroad/ioplacer.tcl
@@ -42,9 +42,14 @@ if { $::env(FP_IO_MIN_DISTANCE) != "" } {
 	lappend arg_list -min_distance $::env(FP_IO_MIN_DISTANCE)
 }
 
+if { $::env(FP_IO_MODE) == "annealing" } {
+    lappend arg_list -annealing
+}
+
 set HMETAL $::env(FP_IO_HLAYER)
 set VMETAL $::env(FP_IO_VLAYER)
 
+puts "\[INFO] place_pins args: $arg_list"
 place_pins {*}$arg_list \
 	-random_seed 42 \
 	-hor_layers $HMETAL \

diff --git a/openlane/steps/openroad.py b/openlane/steps/openroad.py
@@ -768,7 +768,7 @@ class IOPlacement(OpenROADStep):
         + [
             Variable(
                 "FP_IO_MODE",
-                Literal["matching", "random_equidistant"],
+                Literal["matching", "random_equidistant", "annealing"],
                 "Decides the mode of the random IO placement option.",
                 default="matching",
             ),
@@ -945,7 +945,7 @@ class GlobalPlacementSkipIO(GlobalPlacement):
     config_vars = GlobalPlacement.config_vars + [
         Variable(
             "FP_IO_MODE",
-            Literal["matching", "random_equidistant"],
+            Literal["matching", "random_equidistant", "annealing"],
             "Decides the mode of the random IO placement option.",
             default="matching",
         )