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#!/usr/bin/python3
#
# Parse table comments and create equations.
from optparse import OptionParser
import re
from shutil import copyfile
#--------------------------------------------------------------------------------------------------
# Initialize
TYPE_INPUT = 0
TYPE_OUTPUT = 1
TYPE_SKIP = 99
lines = []
tableMatches = []
tableNames = []
tableLines = []
tables = {}
failOnError = True
inFile = 'test.vhdl'
outFileExt = 'vtable'
overwrite = True
backupExt = 'orig'
backup = True
noisy = False
quiet = False
verilog = False
#--------------------------------------------------------------------------------------------------
# Handle command line
usage = 'vtable [options] inFile'
parser = OptionParser(usage)
parser.add_option('-f', '--outfile', dest='outFile', help='output file, default=[inFile]' + outFileExt)
parser.add_option('-o', '--overwrite', dest='overwrite', help='overwrite inFile, default=' + str(overwrite))
parser.add_option('-b', '--backup', dest='backup', help='backup original file, default=' + str(backup))
parser.add_option('-q', '--quiet', dest='quiet', action='store_true', help='quiet messages, default=' + str(quiet))
parser.add_option('-n', '--noisy', dest='noisy', action='store_true', help='noisy messages, default=' + str(noisy))
parser.add_option('-V', '--verilog', dest='verilog', action='store_true', help='source is verilog, default=' + str(verilog))
options, args = parser.parse_args()
if len(args) != 1:
parser.error(usage)
quit(-1)
else:
inFile = args[0]
if options.overwrite == '0':
overwrite = False
elif options.overwrite == '1':
overwrite == True
if options.outFile is not None:
parser.error('Can\'t specify outfile and overrite!')
quit(-1)
elif options.overwrite is not None:
parser.error('overwrite: 0|1')
quit(-1)
if options.quiet is not None:
quiet = True
if options.noisy is not None:
noisy = True
if options.verilog is not None:
verilog = True
if options.backup == '0':
backup = False
elif options.backup == '1':
backup == True
elif options.backup is not None:
parser.error('backup: 0|1')
quit(-1)
if options.outFile is not None:
outFile = options.outFile
elif overwrite:
outFile = inFile
else:
outFile = inFile + '.' + outFileExt
backupFile = inFile + '.' + backupExt
#--------------------------------------------------------------------------------------------------
# Objects
class Signal:
def __init__(self, name, type):
self.name = name;
self.type = type;
class Table:
def __init__(self, name):
self.name = name
self.source = []
self.signals = {}
self.signalsByCol = {}
self.typesByCol = {}
self.specs = [] # list of specsByCol
self.equations = []
self.added = False
def validate(self):
# check that all signals have a good type
for col in self.signalsByCol:
if col not in self.typesByCol:
error('Table ' + self.name + ': no signal type for ' + self.signalsByCol[col])
elif self.typesByCol[col] == None:
error('Table ' + self.name + ': bad signal type (' + str(self.typesByCol[col]) + ') for ' + str(self.signalsByCol[col]))
def makeRTL(self, form=None):
outputsByCol = {}
#for col,type in self.typesByCol.items():
for col in sorted(self.typesByCol):
type = self.typesByCol[col]
if type == TYPE_OUTPUT:
if col in self.signalsByCol:
outputsByCol[col] = self.signalsByCol[col]
else:
print(self.signalsByCol)
print(self.typesByCol)
error('Table ' + self.name + ': output is specified in col ' + str(col) + ' but no signal exists')
#for sigCol,sig in outputsByCol.items():
for sigCol in sorted(outputsByCol):
sig = outputsByCol[sigCol]
if not verilog:
line = sig + ' <= '
else:
line = 'assign ' + sig + ' = '
nonzero = False
for specsByCol in self.specs:
terms = []
if sigCol not in specsByCol:
#error('* Output ' + sig + ' has no specified value for column ' + str(col))
1 # no error, can be dontcare
elif specsByCol[sigCol] == '1':
for col,val in specsByCol.items():
if col not in self.typesByCol:
if noisy:
error('Table ' + self.name +': unexpected value in spec column ' + str(col) + ' (' + str(val) + ') - no associated signal', False) #wtf UNTIL CAN HANDLE COMMENTS AT END!!!!!!!!!!!!!!!!!!!
elif self.typesByCol[col] == TYPE_INPUT:
if val == '0':
terms.append(opNot + self.signalsByCol[col])
if nonzero and len(terms) == 1:
line = line + ') ' + opOr + '\n (';
elif len(terms) == 1:
line = line + '\n ('
nonzero = True
elif val == '1':
terms.append(self.signalsByCol[col])
if nonzero and len(terms) == 1:
line = line + ') ' + opOr + '\n (';
elif len(terms) == 1:
line = line + '\n ('
nonzero = True
else:
error('Table ' + self.name +': unexpected value in spec column ' + str(col) + ' (' + str(val) + ')')
if len(terms) > 0:
line = line + (' ' + opAnd + ' ').join(terms)
if not nonzero:
line = line + zero + ";";
else:
line = line + ');'
self.equations.append(line)
return self.equations
def printv(self):
self.makeRTL()
print('\n'.join(self.equations))
def printinfo(self):
print('Table: ' + self.name)
print
for l in self.source:
print(l)
print
print('Signals by column:')
for col in sorted(self.signalsByCol):
print('{0:>3}. {1:} ({2:}) '.format(col, self.signalsByCol[col], 'in' if self.typesByCol[col] == TYPE_INPUT else 'out'))
#--------------------------------------------------------------------------------------------------
# Functions
def error(msg, quitOverride=None):
print('*** ' + msg)
if quitOverride == False:
1
elif (quitOverride == None) or failOnError:
quit(-10)
elif quitOverride:
quit(-10)
#--------------------------------------------------------------------------------------------------
# Do something
if not verilog:
openBracket = '('
closeBracket = ')'
opAnd = 'and'
opOr = 'or'
opNot = 'not '
zero = "'0'"
tablePattern = re.compile(r'^\s*?--tbl(?:\s+([^\s]+).*$|\s*$)')
tableGenPattern = re.compile(r'^\s*?--vtable(?:\s+([^\s]+).*$)')
commentPattern = re.compile(r'^\s*?(--.*$|\s*$)')
tableLinePattern = re.compile(r'^.*?--(.*)')
namePattern = re.compile(r'([a-zA-z\d_\(\)\.\[\]]+)')
else:
openBracket = '['
closeBracket = ']'
opAnd = '&'
opOr = '+'
opNot = '~'
zero = "'b0"
tablePattern = re.compile(r'^\s*?\/\/tbl(?:\s+([^\s]+).*$|\s*$)')
tableGenPattern = re.compile(r'^\s*?\/\/vtable(?:\s+([^\s]+).*$)')
commentPattern = re.compile(r'^\s*?(\/\/.*$|\s*$)')
tableLinePattern = re.compile(r'^.*?\/\/(.*)')
namePattern = re.compile(r'([a-zA-z\d_\(\)\.\[\]]+)')
# find the lines with table spec
try:
inf = open(inFile)
for i, line in enumerate(inf):
lines.append(line.strip('\n'))
for match in re.finditer(tablePattern, line):
tableMatches.append(i)
inf.close()
except Exception as e:
error('Error opening input file ' + inFile + '\n' + str(e), True)
# validate matches; should be paired, nothing but comments and empties; table may be named
# between them
for i in range(0, len(tableMatches), 2):
if i + 1 > len(tableMatches) - 1:
error('Mismatched table tags.\nFound so far: ' + ', '.join(tableNames), True)
tLines = lines[tableMatches[i]:tableMatches[i+1]+1]
tableLines.append(tLines)
tName = re.match(tablePattern, lines[tableMatches[i]]).groups()[0]
if tName is None:
tName = 'noname_' + str(tableMatches[i] + 1)
tableNames.append(tName)
for line in tLines:
if not re.match(commentPattern, line):
error('Found noncomment, nonempty line in table ' + tName + ':\n' + line, True)
print('Found tables: ' + ', '.join(tableNames))
# build table objects
for table, tName in zip(tableLines, tableNames):
print('Parsing ' + tName + '...')
namesByCol = {}
colsByName = {}
bitsByCol = {}
typesByCol = {}
specs = []
# parse the table - do by Table.parse()
tLines = table[1:-1] # exclude --tbl
for line in tLines:
if line.strip() == '':
continue
try:
spec = re.search(tableLinePattern, line).groups()[0]
except Exception as e:
error('Problem parsing table line:\n' + line, True)
if len(spec) > 0:
if spec[0] == 'n':
for match in re.finditer(namePattern, spec[1:]):
# col 0 is first col after n
namesByCol[match.start()] = match.groups()[0]
colsByName[match.groups()[0]] = match.start()
elif spec[0] == 'b':
for i, c in enumerate(spec[1:]):
if c == ' ' or c == '|':
continue
try:
bit = int(c)
except:
error('Unexpected char in bit line at position ' + str(i) + ' (' + c + ')\n' + line)
bit = None
if i in bitsByCol and bitsByCol[i] is not None:
bitsByCol[i] = bitsByCol[i]*10+bit
else:
bitsByCol[i] = bit
elif spec[0] == 't':
for i, c in enumerate(spec[1:]):
if c.lower() == 'i':
typesByCol[i] = TYPE_INPUT
elif c.lower() == 'o':
typesByCol[i] = TYPE_OUTPUT
elif c.lower() == '*':
typesByCol[i] = TYPE_SKIP
elif c != ' ':
error('Unexpected char in type line at position ' + str(i) + ' (' + c + ')\n' + line)
typesByCol[i] = None
else:
typesByCol[i] = None
elif spec[0] == 's':
specsByCol = {}
for i, c in enumerate(spec[1:]):
if c == '0' or c == '1':
specsByCol[i] = c
specs.append(specsByCol)
else:
#print('other:')
#print(line)
1
# create table object
# add strand to name where defined; don't combine for now into vector
# consecutive strands belong to the last defined name
lastName = None
lastCol = 0
signalsByCol = {}
for col,name in namesByCol.items(): # load with unstranded names
signalsByCol[col] = name
# sort by col so consecutive columns can be easily tracked
#for col,val in bitsByCol.items(): # update with stranded names
for col in sorted(bitsByCol):
val = bitsByCol[col]
if col > lastCol + 1:
lastName = None
if val is None:
lastName = None
if col in namesByCol:
if val is None:
signalsByCol[col] = namesByCol[col]
else:
lastName = namesByCol[col]
signalsByCol[col] = lastName + openBracket + str(val) + closeBracket
elif lastName is not None:
signalsByCol[col] = lastName + openBracket + str(val) + closeBracket
else:
error('Can\'t associate bit number ' + str(val) + ' in column ' + str(col) + ' with a signal name.')
lastCol = col
t = Table(tName)
t.source = table
t.signalsByCol = signalsByCol
t.typesByCol = typesByCol
t.specs = specs
tables[tName] = t
for name in tables:
t = tables[name]
t.validate()
t.makeRTL()
print()
print('Results:')
# find the lines with generate spec and replace them with new version
outLines = []
inTable = False
for i, line in enumerate(lines):
if not inTable:
match = re.search(tableGenPattern, line)
if match is not None:
tName = match.groups(1)[0]
if tName not in tables:
if tName == 1:
tName = '<blank>'
error('Found vtable start for \'' + tName + '\' but didn\'t generate that table: line ' + str(i+1) + '\n' + line, True)
else:
outLines.append(line)
outLines += tables[tName].equations
tables[tName].added = True
inTable = True
else:
outLines.append(line)
else:
match = re.search(tableGenPattern, line)
if match is not None:
if match.groups(1)[0] != tName:
error('Found vtable end for \'' + match.groups(1)[0] + '\' but started table \'' + tName + '\': line ' + str(i+1) + '\n' + line, True)
outLines.append(line)
inTable = False
else:
1#print('stripped: ' + line)
if backup:
try:
copyfile(inFile, backupFile)
except Exception as e:
error('Error creating backup file!\n' + str(e), True)
try:
of = open(outFile, 'w')
for line in outLines:
of.write("%s\n" % line)
except Exception as e:
error('Error writing output file ' + outFile + '!\n' + str(e), True)
print('Generated ' + str(len(tables)) + ' tables: ' + ', '.join(tableNames))
notAdded = {}
for table in tables:
if not tables[table].added:
notAdded[table] = True
print('Output file: ' + outFile)
if backup:
print('Backup file: ' + backupFile)
if len(notAdded) != 0:
error('Tables generated but not added to file! ' + ', '.join(notAdded))