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