opensta_parser.py run error

[yu4spice]

Hi,

When running PACT/src/OpenRoad/opensta_parser.py to obtain power numbers, the python script generates a temporary
template file "Script_template", which serves as the tcl command file for resizer. This file should be removed after the script
is done, or deleted before the script starts writing to it. Otherwise tcl commands will be kept adding up in the file due to
append mode used in function "write_file()". Similar issue for the other temporary file "outputhotspot".

Following is a modified opensta_parser.py, which checks the existence of these temporary files, and removes them if they do
exist. Usage is the same as the original script.

Thanks,

Yu

"""

Generates power map

optional arguments:
-h, --help show this help message and exit
--lib Path to the library file
--lef Path to the lef file
--deff Path to the routed def file
--resizer Path to resizer binary files
--clk Clock period of the design"""

import os
import argparse
from pathlib import Path

def read_file(filepath):
try:
with open(filepath, 'r') as f:
return f.readlines()
except IOError:
print('Could not read the following file:',filepath)

def write_file(filepath,line):
try:
with open(filepath, 'a') as f:
f.write(line)
f.close()
except IOError:
print('Could not write in the following file:',filepath)

#Parses arguments from the command line

def ParseArg():
parser = argparse.ArgumentParser(description= 'Generates power map')
parser.add_argument('--lib',type=str,required=True,metavar='', help='Path to the library file')
parser.add_argument('--lef',type=str,required=True, metavar='',help='Path to the lef file')
parser.add_argument('--deff',type=str,required=True, metavar='',help='Path to the routed def file')
parser.add_argument('--resizer',type=str,required=True, metavar='',help='Path to resizer binary files')
parser.add_argument('--clk',type=str,required=True, metavar='',help='Clock period of the design')
return parser.parse_args()

#Writes a script file to be used by resizer

def ScriptTemplate(args):
line='read_liberty '
line='%s %s %s'%(line,args.lib,'\n')
write_file("Script_template",line)

line='read_lef '
line='%s %s %s'%(line,args.lef,'\n')
write_file("Script_template",line)


line='read_def '
line='%s %s %s'%(line,args.deff,'\n')
write_file("Script_template",line)


line='create_clock -name clk -period '
line='%s %s %s %s'%(line,args.clk,'{clk}','\n')
write_file("Script_template",line)

#Parses the def file and returns the coordinates and the list of instances, as well as the associated resizer command

def ParseDef(args):
inst=[]
xcoord=[]
ycoord=[]
listline=read_file(args.deff)
mylines=[]

for line in listline:
	mylines.append(line.split())

for i in range(len(mylines)):
	if(len(mylines[i])!=0):
		if(mylines[i][0]=='COMPONENTS'):
			break

start=i+1

for j in range(start,len(mylines)):
	    if(len(mylines[j])!=0):
    	        if(mylines[j][0]=='END'):
        	            break

end=j


for i in range(start,end):
	if(len(mylines[i])>1):
		inst.append(mylines[i][1])
		xcoord.append(mylines[i][mylines[i].index('(')+1])
		ycoord.append(mylines[i][mylines[i].index('(')+2])

for i in range(len(inst)):
	inst[i]=inst[i].replace('\\','')

command='report_power -instances "'

for i in range(0,len(inst)):
	command='%s %s'%(command,inst[i])

command='%s" > out'%(command)
return command, xcoord,ycoord,inst;

Runs resizer and parses its output to generate the output file that contains the coordinates and the power of each instance

def RunResizer(args,command,xcoord,ycoord,inst):
stamylines=[]
stainst=[]
stapower=[]
write_file("Script_template",command)
exec_command='%s %s'%(args.resizer,' -exit Script_template')
os.system(exec_command)
stalistline=read_file('out')

for line in stalistline:
	stamylines.append(line.split())

for i in range(3,len(stamylines)):
	stapower.append(stamylines[i][3])
	stainst.append(stamylines[i][4])


for i in range(len(stapower)):
	st=stapower[i]
	st='%s %s %s \n'%(st,xcoord[inst.index(stainst[i])],ycoord[inst.index(stainst[i])])
	write_file("outputhotspot",st)

if name == "main":
args=ParseArg()
#-- remove previous-run temporary result files, if exist
script_file = Path('Script_template')
if script_file.is_file():
print("Removing script template file")
os.remove('Script_template')
output_file = Path('outputhotspot')
if output_file.is_file():
print("Removing output file")
os.remove('outputhotspot')

ScriptTemplate(args)
print("Parsing DEF file...")
command,xcoord,ycoorrd,inst=ParseDef(args)
print("Running Resizer...")
RunResizer(args,command,xcoord,ycoorrd,inst)
print("Script done. Output file is outputhotspot")
os.rename('Script_template', 'Script_template.done')