[Numpy-discussion] float128 / longdouble on PPC - is it broken?
Matthew Brett
matthew.brett at gmail.com
Tue Oct 25 00:59:25 EDT 2011
Hi,
I just ran into this on a PPC machine:
In [1]: import numpy as np
In [2]: np.__version__
Out[2]: '2.0.0.dev-4daf949'
In [3]: res = np.longdouble(2)**64
In [4]: res
Out[4]: 18446744073709551616.0
In [5]: 2**64
Out[5]: 18446744073709551616L
In [6]: res-1
Out[6]: 36893488147419103231.0
Same for numpy 1.4.1.
I don't have a SPARC to test on but I believe it's the same double-double type?
See you,
Matthew
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