Add technology parameter for library prefix during uniquification of GDS

compiler/example_configs/sky130_sram_common.py

@@ -12,6 +12,7 @@ nominal_corner_only = True
 route_supplies = "ring"
 #route_supplies = "left"
 check_lvsdrc = True
+uniquify = True
 #perimeter_pins = False
 #netlist_only = True
 #analytical_delay = False

compiler/gdsMill/gdsMill/vlsiLayout.py

@@ -81,7 +81,7 @@ class VlsiLayout:
             coordinatesRotate.extend((newX,newY))
         return coordinatesRotate
 
-    def uniquify(self):
+    def uniquify(self, prefix_name=None):
         new_structures = {}
         if self.rootStructureName[-1] == "\x00":
             prefix = self.rootStructureName[0:-1] + "_"
@@ -92,7 +92,10 @@ class VlsiLayout:
                 base_name = name[0:-1]
             else:
                 base_name = name
-            if name != self.rootStructureName:
+            # Don't do library cells
+            if prefix_name and base_name.startswith(prefix_name):
+                new_name = name
+            elif name != self.rootStructureName:
                 new_name = self.padText(prefix + base_name)
             else:
                 new_name = name
@@ -105,7 +108,11 @@ class VlsiLayout:
                     base_sref_name = sref.sName[0:-1]
                 else:
                     base_sref_name = sref.sName
-                new_sref_name = self.padText(prefix + base_sref_name)
+                # Don't do library cells
+                if prefix_name and base_sref_name.startswith(prefix_name):
+                    new_sref_name = sref.sName
+                else:
+                    new_sref_name = self.padText(prefix + base_sref_name)
                 sref.sName = new_sref_name
                 #print("SREF: {0} -> {1}".format(base_sref_name, new_sref_name))
         self.structures = new_structures
@@ -774,9 +781,9 @@ class VlsiLayout:
                         shapes = self.getAllShapes(lpp)
                     else:
                         lpp = layer_override[label_text]
-                        
-                        
-                    
+
+
+
             except:
                 pass
             for boundary in shapes:

compiler/prefixGDS.py

@@ -1,19 +0,0 @@
-#!/usr/bin/env python3
-
-import sys
-from gdsMill import gdsMill
-
-if len(sys.argv) < 3:
-    print("Script to prefix every instance and structure with the root cell name to provide unique namespace.")
-    print("Usage: {0} in.gds out.gds".format(sys.argv[0]))
-    sys.exit(1)
-
-gds_file = sys.argv[1]
-gds = gdsMill.VlsiLayout()
-reader = gdsMill.Gds2reader(gds)
-reader.loadFromFile(gds_file)
-
-gds.uniquify()
-
-writer = gdsMill.Gds2writer(gds)
-writer.writeToFile(sys.argv[2])

compiler/sram/sram.py

@@ -69,7 +69,12 @@ class sram():
             reader = gdsMill.Gds2reader(gds)
             reader.loadFromFile(name)
 
-            gds.uniquify()
+            # Uniquify but skip the library cells since they are hard coded
+            try:
+                from tech import library_prefix_name
+            except ImportError:
+                library_prefix_name = None
+            gds.uniquify(library_prefix_name)
 
             writer = gdsMill.Gds2writer(gds)
             unique_name = name.replace(".gds", "_unique.gds")

compiler/uniquifyGDS.py

@@ -3,17 +3,17 @@
 import sys
 from gdsMill import gdsMill
 
-if len(sys.argv) < 3:
-    print("Script to prefix every instance and structure with the root cell name to provide unique namespace.")
-    print("Usage: {0} in.gds out.gds".format(sys.argv[0]))
+if len(sys.argv) < 4:
+    print("Script to prefix every instance and structure with the root cell name to provide unique namespace, but skip cells that begin with the library prefix.")
+    print("Usage: {0} <library prefix> in.gds out.gds".format(sys.argv[0]))
     sys.exit(1)
 
-gds_file = sys.argv[1]
+gds_file = sys.argv[2]
 gds = gdsMill.VlsiLayout()
 reader = gdsMill.Gds2reader(gds)
 reader.loadFromFile(gds_file)
 
-gds.uniquify()
+gds.uniquify(prefix_name=sys.argv[1])
 
 writer = gdsMill.Gds2writer(gds)
-writer.writeToFile(sys.argv[2])
+writer.writeToFile(sys.argv[3])