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Re: [Axiom-developer] floating point changes

From: Gabriel Dos Reis
Subject: Re: [Axiom-developer] floating point changes
Date: Sat, 17 May 2008 17:56:19 -0500

On Sat, May 17, 2008 at 7:00 PM, root <address@hidden> wrote:
> The floating point results returned running fedora8 and fedora9 differ
> in the low order bits (same hardware). Does anyone know what might
> have changed? Is this a library or C compiler change?

If you're running on x86, then your floating point calculations are at the mercy
of how aggressive the compiler is at keeping numbers in registers or other
constants folding.  Unless, you use certifying libraries such as MPFR.

This is to a large extent a hardware problem
> Tim
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