Fixed CTS handling of flow variables

Signed-off-by: Jeff Ng <[email protected]>

Author: jeffng-or

flow/designs/ihp-sg13g2/ibex/rules-base.json

@@ -28,7 +28,7 @@
         "compare": "<="
     },
     "globalroute__antenna_diodes_count": {
-        "value": 594,
+        "value": 1088,
         "compare": "<="
     },
     "detailedroute__route__wirelength": {
@@ -40,7 +40,7 @@
         "compare": "<="
     },
     "detailedroute__antenna__violating__nets": {
-        "value": 36,
+        "value": 51,
         "compare": "<="
     },
     "detailedroute__antenna_diodes_count": {

flow/designs/ihp-sg13g2/riscv32i/rules-base.json

@@ -8,7 +8,7 @@
         "compare": "=="
     },
     "placeopt__design__instance__area": {
-        "value": 177178,
+        "value": 173952,
         "compare": "<="
     },
     "placeopt__design__instance__count__stdcell": {
@@ -48,7 +48,7 @@
         "compare": "<="
     },
     "finish__timing__setup__ws": {
-        "value": -0.92,
+        "value": -0.72,
         "compare": ">="
     },
     "finish__design__instance__area": {
@@ -64,7 +64,7 @@
         "compare": "<="
     },
     "finish__timing__wns_percent_delay": {
-        "value": -23.85,
+        "value": -19.8,
         "compare": ">="
     }
 }

flow/scripts/cts.tcl

@@ -18,9 +18,10 @@ set cts_args [list \
           -sink_clustering_enable \
           -balance_levels]
 
-append_env_var cts_args -distance_between_buffers CTS_BUF_DISTANCE 1
-append_env_var cts_args -sink_clustering_size CTS_CLUSTER_SIZE 1
-append_env_var cts_args -sink_clustering_max_diameter CTS_CLUSTER_DIAMETER 1
+append_env_var cts_args CTS_BUF_DISTANCE -distance_between_buffers 1
+append_env_var cts_args CTS_CLUSTER_SIZE -sink_clustering_size 1
+append_env_var cts_args CTS_CLUSTER_DIAMETER -sink_clustering_max_diameter 1
+append_env_var cts_args CTS_BUF_LIST -buf_list 1
 
 if {[env_var_exists_and_non_empty CTS_ARGS]} {
   set cts_args $::env(CTS_ARGS)

flow/scripts/variables.yaml

@@ -721,6 +721,11 @@ CTS_BUF_DISTANCE:
     Distance (in microns) between buffers.
   stages:
     - cts
+CTS_BUF_LIST:
+  description: |
+    List of cells used to construct the clock tree.
+  stages:
+    - cts
 CTS_CLUSTER_DIAMETER:
   description: >
     Maximum diameter (in microns) of sink cluster.