Added an option that prevents lib.py from generating corners and only uses corners in config file.

compiler/characterizer/lib.py

@@ -77,18 +77,27 @@ class lib:
 
         # Nominal corner
         corner_set = set()
-        nom_corner = (nom_process, nom_supply, nom_temperature)
+        if OPTS.only_use_config_corners:
-        corner_set.add(nom_corner)
+            if OPTS.nominal_corner_only:
-        if not OPTS.nominal_corner_only:
+                debug.warning("Nominal corner only option ignored if use only config corners is set.")
-            # Temperature corners
+            # Generate a powerset of input PVT lists
-            corner_set.add((nom_process, nom_supply, min_temperature))
+            for p in self.process_corners:
-            corner_set.add((nom_process, nom_supply, max_temperature))
+                for v in self.supply_voltages:
-            # Supply corners
+                    for t in self.temperatures:
-            corner_set.add((nom_process, min_supply, nom_temperature))
+                        corner_set.add((p, v, t))
-            corner_set.add((nom_process, max_supply, nom_temperature))
+        else:    
-            # Process corners
+            nom_corner = (nom_process, nom_supply, nom_temperature)
-            corner_set.add((min_process, nom_supply, nom_temperature))
+            corner_set.add(nom_corner)
-            corner_set.add((max_process, nom_supply, nom_temperature))
+            if not OPTS.nominal_corner_only:
+                # Temperature corners
+                corner_set.add((nom_process, nom_supply, min_temperature))
+                corner_set.add((nom_process, nom_supply, max_temperature))
+                # Supply corners
+                corner_set.add((nom_process, min_supply, nom_temperature))
+                corner_set.add((nom_process, max_supply, nom_temperature))
+                # Process corners
+                corner_set.add((min_process, nom_supply, nom_temperature))
+                corner_set.add((max_process, nom_supply, nom_temperature))
 
         # Enforce that nominal corner is the first to be characterized
         self.add_corner(*nom_corner)

compiler/options.py

@@ -82,6 +82,8 @@ class options(optparse.Values):
     verbose_level = 0
     # Drop to pdb on failure?
     debug = False
+    # Only use corners in config file. Disables generated corners
+    only_use_config_corners = False
     
 
     ###################