mirror of
https://github.com/myhdl/myhdl.git
synced 2025-01-24 21:52:56 +08:00
58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
# This file is part of the myhdl library, a Python package for using
|
|
# Python as a Hardware Description Language.
|
|
#
|
|
# Copyright (C) 2003-2008 Jan Decaluwe
|
|
#
|
|
# The myhdl library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public License as
|
|
# published by the Free Software Foundation; either version 2.1 of the
|
|
# License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this library; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
""" module with the bin function.
|
|
|
|
"""
|
|
|
|
|
|
|
|
def _int2bitstring(num):
|
|
if num == 0:
|
|
return '0'
|
|
if abs(num) == 1:
|
|
return '1'
|
|
bits = []
|
|
p, q = divmod(num, 2)
|
|
bits.append(str(q))
|
|
while not (abs(p) == 1):
|
|
p, q = divmod(p, 2)
|
|
bits.append(str(q))
|
|
bits.append('1')
|
|
bits.reverse()
|
|
return ''.join(bits)
|
|
|
|
|
|
def bin(num, width=0):
|
|
"""Return a binary string representation.
|
|
|
|
num -- number to convert
|
|
Optional parameter:
|
|
width -- specifies the desired string (sign bit padding)
|
|
"""
|
|
num = long(num)
|
|
s = _int2bitstring(num)
|
|
if width:
|
|
pad = '0'
|
|
if num < 0:
|
|
pad = '1'
|
|
return (width - len(s)) * pad + s
|
|
return s
|
|
|