[Numpy-discussion] Solaris Sparc build broken
Charles R Harris
charlesr.harris at gmail.com
Thu Nov 5 02:07:02 EST 2009
On Wed, Nov 4, 2009 at 11:39 PM, David Cournapeau <
david at ar.media.kyoto-u.ac.jp> wrote:
> Charles R Harris wrote:
> >
> >
> > On Wed, Nov 4, 2009 at 11:30 PM, David Cournapeau
> > <david at ar.media.kyoto-u.ac.jp <mailto:david at 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...
>
>
It tells you how many bits are in the mantissa, and given ieee the rest
follows. We only support ieee anyway.
Chuck
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