Scholes C added the comment:
HI,
can you please look into this ?
thanks.
icc builds of python 2.7 seem to have issues handling nan, inf, etc
$ /usr/local/python-2.7.6/bin/python
Python 2.7.6 (default, Jan 10 2014, 12:14:02)
[GCC Intel(R) C++ gcc 4.1 mode] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print float('nan')
0.0
$ /usr/local/python-2.6.6-64bit/bin/python
Python 2.6.6 (r266:84292, Oct 14 2010, 15:47:19)
[GCC Intel(R) C++ gcc 4.1 mode] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print float('nan')
nan
I tried both –fp-model strict and –fp-model precise compiler options as
suggested by http://bugs.python.org/issue21167, but neither seems to resolve
other situations like the one with atan2 below:
$ LD_LIBRARY_PATH=/dat/sharefolder_scratch/python-build ./python
Python 2.7.9 (default, Feb 18 2015, 19:58:37)
[GCC Intel(R) C++ gcc 4.1 mode] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print float('nan')
nan
>>> import math
>>> print math.atan2(0, float('nan'))
0.0
$ /usr/local/python-2.6.6-64bit/bin/python
Python 2.6.6 (r266:84292, Oct 14 2010, 15:47:19)
[GCC Intel(R) C++ gcc 4.1 mode] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import math
>>> print math.atan2(0, float('nan'))
nan
----------
nosy: +Scholes.C
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21167>
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