openlane/scripts/fake_diode_replace.py

# Copyright 2020 Efabless Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import re
import argparse


# for i in range(len(sys.argv)):

parser = argparse.ArgumentParser(
    description="Replaces fake diodes with real diodes based on the violating cells/pins"
)

parser.add_argument("--defFile", "-d", required=True, help="Input DEF")

parser.add_argument(
    "--viosFile",
    "-v",
    required=True,
    help="vios.txt containing white space separated cells that cause antenna violations",
)

parser.add_argument(
    "--fakeDiode", "-f", required=True, help="the name of the fake diode"
)
parser.add_argument(
    "--trueDiode", "-t", required=True, help="the name of the true diode"
)

args = parser.parse_args()

viosFile = args.viosFile
defFile = args.defFile

fakeDiode = args.fakeDiode
trueDiode = args.trueDiode


tmpFile = open(viosFile, "r")
if tmpFile.mode == "r":
    listOfVios = tmpFile.read().split()
tmpFile.close()

tmpFile = open(defFile, "r")
if tmpFile.mode == "r":
    defContent = tmpFile.read().split("\n")
tmpFile.close()

exitFlag = False
for i in range(len(defContent)):
    if defContent[i].find("COMPONENTS") != -1:
        if exitFlag:
            break
        else:
            exitFlag = True
            continue

    antennaPos = defContent[i].find("ANTENNA_")
    if antennaPos != -1:
        cell = re.findall(r"- ANTENNA_(\S+)_.* " + fakeDiode + ".*", defContent[i])
        if len(cell) >= 1:
            if cell[0] in listOfVios:
                defContent[i] = defContent[i].replace(fakeDiode, trueDiode)

tmpFile = open(defFile, "w")
tmpFile.write("\n".join(defContent))
tmpFile.close()