On Wed, Nov 4, 2009 at 12:35 PM, Charles R Harris <[email protected] > wrote:
> > > On Wed, Nov 4, 2009 at 12:11 PM, David Cournapeau <[email protected]>wrote: > >> On Thu, Nov 5, 2009 at 2:15 AM, Michael Droettboom <[email protected]> >> wrote: >> > I'm getting the following from r7603 on Solaris Sparc -- somehow related >> > to not having a long double version of next after available. I realise >> > not everyone has access to (or is dependent on) this platform, so I'm >> > willing to help in whatever way I can, I'm just not sure I understand >> > the change yet. >> >> The only way to implement nextafter that I know of requires to know >> the exact representation of the floating point number, and long double >> is unfortunately platform dependent. >> >> What is the long double format on solaris sparc ? (big endian I >> suppose, but how many bits for the mantissa and exponent ? Does it >> follow IEER754 ?) >> >> > Long double on SPARC is quad precision, which I believe *is* in one of the > ieee specs. In any case, it has a lot more precision than the extended > precision found in Intel derived architectures. Hmm, I wonder what ia64 > does? > > HP9000 also has quad precision: http://docs.hp.com/en/B3906-90006/ch02s02.html Chuck
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