Finalize uniquify option for SRAMs

compiler/gdsMill/gdsMill/vlsiLayout.py

@@ -81,8 +81,9 @@ class VlsiLayout:
             coordinatesRotate.extend((newX,newY))
         return coordinatesRotate
 
-    def prefixAll(self, prefix):
+    def uniquify(self):
         new_structures = {}
+        prefix = self.rootStructureName + "_"
 
         for name in self.structures:
             if name != self.rootStructureName:

compiler/options.py

@@ -166,6 +166,9 @@ class options(optparse.Values):
 
     keep_temp = False
 
+    # Add a prefix of the root cell before every structure in the GDS
+    # after outputting the GDS2
+    uniquify = False
 
     # These are the default modules that can be over-riden
     bank_select = "bank_select"

compiler/prefixGDS.py

@@ -4,8 +4,8 @@ import sys
 from gdsMill import gdsMill
 
 if len(sys.argv) < 4:
-    print("Script to prefix every instance and structure to create a unique namespace.")
-    print("Usage: {0} prefix in.gds out.gds".format(sys.argv[0]))
+    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)
 
 prefix = sys.argv[1]
@@ -15,7 +15,7 @@ gds = gdsMill.VlsiLayout()
 reader = gdsMill.Gds2reader(gds)
 reader.loadFromFile(gds_file)
 
-gds.prefixAll(prefix)
+gds.uniquify()
 
 writer = gdsMill.Gds2writer(gds)
 writer.writeToFile(sys.argv[3])

compiler/sram/sram.py

@@ -11,6 +11,7 @@ import debug
 import verify
 from characterizer import functional
 from globals import OPTS, print_time
+import shutil
 
 
 class sram():
@@ -60,6 +61,21 @@ class sram():
     def gds_write(self, name):
         self.s.gds_write(name)
 
+        # This addresses problems with flat GDS namespaces when we
+        # want to merge this SRAM with other SRAMs.
+        if OPTS.uniquify:
+            import gdsMill
+            gds = gdsMill.VlsiLayout()
+            reader = gdsMill.Gds2reader(gds)
+            reader.loadFromFile(name)
+
+            gds.uniquify()
+
+            writer = gdsMill.Gds2writer(gds)
+            unique_name = name.replace(".gds", "_unique.gds")
+            writer.writeToFile(unique_name)
+            shutil.move(unique_name, name)
+
     def verilog_write(self, name):
         self.s.verilog_write(name)