mirror of https://github.com/VLSIDA/OpenRAM.git
65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
import os
|
|
import sys
|
|
|
|
#----------------------------------------------------------------------------#
|
|
# Support GMPY for high-speed large integer arithmetic. #
|
|
# #
|
|
# To allow an external module to handle arithmetic, we need to make sure #
|
|
# that all high-precision variables are declared of the correct type. MPZ #
|
|
# is the constructor for the high-precision type. It defaults to Python's #
|
|
# long type but can be assinged another type, typically gmpy.mpz. #
|
|
# #
|
|
# MPZ must be used for the mantissa component of an mpf and must be used #
|
|
# for internal fixed-point operations. #
|
|
# #
|
|
# Side-effects #
|
|
# 1) "is" cannot be used to test for special values. Must use "==". #
|
|
# 2) There are bugs in GMPY prior to v1.02 so we must use v1.03 or later. #
|
|
#----------------------------------------------------------------------------#
|
|
|
|
# So we can import it from this module
|
|
gmpy = None
|
|
sage = None
|
|
sage_utils = None
|
|
|
|
BACKEND = 'python'
|
|
MPZ = long
|
|
|
|
if 'MPMATH_NOGMPY' not in os.environ:
|
|
try:
|
|
import gmpy
|
|
if gmpy.version() >= '1.03':
|
|
BACKEND = 'gmpy'
|
|
MPZ = gmpy.mpz
|
|
except:
|
|
pass
|
|
|
|
if 'MPMATH_NOSAGE' not in os.environ:
|
|
try:
|
|
import sage.all
|
|
import sage.libs.mpmath.utils as _sage_utils
|
|
sage = sage.all
|
|
sage_utils = _sage_utils
|
|
BACKEND = 'sage'
|
|
MPZ = sage.Integer
|
|
except:
|
|
pass
|
|
|
|
if 'MPMATH_STRICT' in os.environ:
|
|
STRICT = True
|
|
else:
|
|
STRICT = False
|
|
|
|
MPZ_TYPE = type(MPZ(0))
|
|
MPZ_ZERO = MPZ(0)
|
|
MPZ_ONE = MPZ(1)
|
|
MPZ_TWO = MPZ(2)
|
|
MPZ_THREE = MPZ(3)
|
|
MPZ_FIVE = MPZ(5)
|
|
|
|
if BACKEND == 'python':
|
|
int_types = (int, long)
|
|
else:
|
|
int_types = (int, long, MPZ_TYPE)
|
|
|