blob: fcbc9b36745e8d159437ff9d2fead6cd0c335283 [file] [log] [blame]
#!/usr/bin/env python3
#
# convert_io_cdl.py ---
#
# This script converts the GF CDL for the I/O pads to turn it into valid
# SPICE syntax, using regular expression parsing.
# This script is a filter to be run by setting the name of this script as
# the value to "filter=" for the model install in the sky130 Makefile.
import re
import os
import sys
def filter(inname, outname):
# Read input
try:
with open(inname, 'r') as inFile:
spitext = inFile.read()
# (Don't) unwrap continuation lines
# spilines = spitext.replace('\n+', ' ').splitlines()
spilines = spitext.splitlines()
except:
print('convert_io_cdl.py: failed to open ' + inname + ' for reading.', file=sys.stderr)
return 1
fixedlines = []
modified = False
resrex = re.compile('^R', re.IGNORECASE)
caprex = re.compile('^C', re.IGNORECASE)
for line in spilines:
fixedline = line
isres = resrex.match(fixedline)
iscap = caprex.match(fixedline)
# check if resistor or capacitor for parameter name changes
# regexp substitutions:
# 1) Lines starting with R, C, or M --> change to X
fixedline = re.sub('^[RCM]', 'X', fixedline, flags=re.IGNORECASE)
# 2) Names in $[...] --> remove the delimiter
fixedline = re.sub(' \$\[', ' ', fixedline, flags=re.IGNORECASE)
fixedline = re.sub('\] ', ' ', fixedline, flags=re.IGNORECASE)
# 3) Remove $SUB=
fixedline = re.sub('\$SUB=', '', fixedline, flags=re.IGNORECASE)
# 4) Handle $W and $L for resistors
if isres:
fixedline = re.sub('\$W', 'r_width', fixedline, flags=re.IGNORECASE)
fixedline = re.sub('\$L', 'r_length', fixedline, flags=re.IGNORECASE)
if iscap:
fixedline = re.sub('w=', 'c_width=', fixedline, flags=re.IGNORECASE)
fixedline = re.sub('l=', 'c_length=', fixedline, flags=re.IGNORECASE)
# 5) Lowercase AREA and PJ
fixedline = re.sub('AREA', 'area', fixedline)
fixedline = re.sub('PJ', 'pj', fixedline)
if line != fixedline:
modified = True
fixedlines.append(fixedline)
# Write output
if outname == None:
for i in fixedlines:
print(i)
else:
# If the output is a symbolic link but no modifications have been made,
# then leave it alone. If it was modified, then remove the symbolic
# link before writing.
if os.path.islink(outname):
if not modified:
return 0
else:
os.unlink(outname)
try:
with open(outname, 'w') as outFile:
for i in fixedlines:
print(i, file=outFile)
except:
print('convert_io_cdl.py: failed to open ' + outname + ' for writing.', file=sys.stderr)
return 1
if __name__ == '__main__':
# This script expects to get one or two arguments. One argument is
# mandatory and is the input file. The other argument is optional and
# is the output file. The output file and input file may be the same
# name, in which case the original input is overwritten.
options = []
arguments = []
for item in sys.argv[1:]:
if item.find('-', 0) == 0:
options.append(item[1:])
else:
arguments.append(item)
if len(arguments) > 0:
infilename = arguments[0]
if len(arguments) > 1:
outfilename = arguments[1]
else:
outfilename = None
result = filter(infilename, outfilename)
sys.exit(result)