Added processing to the SRAM core device model files to remove
parameters that are both unnecessary/unused and incompatible with
Xyce.
diff --git a/sky130/custom/scripts/xyce_hack2.py b/sky130/custom/scripts/xyce_hack2.py
new file mode 100755
index 0000000..5d8f1a0
--- /dev/null
+++ b/sky130/custom/scripts/xyce_hack2.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+#
+#--------------------------------------------------------------------
+# Workaround for the problem that xyce does not ignore ACM model
+# parameters passed to bsim3 models, and throws an error. These
+# parameters have no known effect on simulation and therefore
+# should be removed.
+#--------------------------------------------------------------------
+
+import os
+import re
+import sys
+
+plist = ["ldif", "hdif", "rd", "rs", "rsc", "rdc", "nqsmod"]
+regexps = []
+for parm in plist:
+ regexps.append(re.compile('^\+[ \t]*' + parm + '[ \t]*=[ \t]*0.0', re.IGNORECASE))
+
+if len(sys.argv) <= 1:
+ print('Usage: xyce_hack2.py <path_to_file>')
+ sys.exit(1)
+
+else:
+ infile_name = sys.argv[1]
+
+ filepath = os.path.split(infile_name)[0]
+ outfile_name = os.path.join(filepath, 'temp')
+
+ infile = open(infile_name, 'r')
+ outfile = open(outfile_name, 'w')
+
+ line_number = 0
+ replaced_something = False
+ for line in infile:
+ line_number += 1
+
+ for rex in regexps:
+ rmatch = rex.match(line)
+ if rmatch:
+ # If a match is found, comment out the line.
+ replaced_something = True
+ break
+
+ if rmatch:
+ newline = re.sub('^\+', '* +', line)
+ else:
+ newline = line
+
+ outfile.write(newline)
+
+ infile.close()
+ outfile.close()
+ if replaced_something:
+ print("Something was replaced in '{}'".format(infile_name))
+ os.rename(outfile_name, infile_name)
+ else:
+ print("Nothing was replaced in '{}'.".format(infile_name))
+ os.remove(outfile_name)
+
