[Numpy-discussion] Solaris Sparc build broken

David Cournapeau david@ar.media.kyoto-u.ac...
Thu Nov 5 00:39:19 CST 2009


Charles R Harris wrote:
>
>
> On Wed, Nov 4, 2009 at 11:30 PM, David Cournapeau
> <david@ar.media.kyoto-u.ac.jp <mailto:david@ar.media.kyoto-u.ac.jp>>
> wrote:
>
>     Charles R Harris wrote:
>
>     >
>     > I don't think it's that bad. Leaving out the ppc and sticking to
>     ieee,
>     > there is only double precision, extended precision and quad
>     precision
>     > versions of long double and they  are easily determined at run time.
>
>     How would you determine this at runtime ?
>
>
> Excepting the PPC, just loop adding a number to one, dividing it by
> two at each iteration, and stop when the result is equal to one.

But that's not what I need. I need to know exactly the binary
representation: how many bits in the mantissa/exponent and where, the
exponent, where does subnormals start, the range of NAN representations,
etc...

David


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