blob: 5fa319948f5c651af7e6755911d00d35893350ee [file] [log] [blame]
#!/usr/bin/env python3
#
# fix_default_fanout_load.py ---
#
# Some of the sky130 liberty files have default_fanout_load set to 1,
# others have it set to 0. When set to 0 all fan out management and
# violation reporting is disabled, so change any instances of 0 to 1.
#
# This script is a filter to be run by setting the name of this script as
# the value to "filter=" for the lib install in the sky130 Makefile.
import re
import os
import sys
def filter(inname, outname):
# Read input
try:
with open(inname, 'r') as inFile:
stext = inFile.read()
slines = stext.splitlines()
except:
print('fix_default_fanout_load.py: failed to open ' + inname + ' for reading.', file=sys.stderr)
return 1
# Process input with regexp
fixedlines = []
modified = False
fanout_re = re.compile('\s*default_fanout_load\s*:\s*([\d\.]+)\s*;')
for line in slines:
lmatch = fanout_re.match(line)
if lmatch:
val_str = lmatch.group(1)
val = int(float(val_str))
if val == 0:
modified = True
line = line.replace(val_str, '1.0000000000')
fixedlines.append(line)
# 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('fix_default_fanout_load.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)