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Re: [Help-gsl] IEEE doubles/ANSI C questions
From: |
Brian Gough |
Subject: |
Re: [Help-gsl] IEEE doubles/ANSI C questions |
Date: |
Thu, 4 Nov 2004 17:58:27 +0000 |
Michael Mair writes:
> Umh, the C standard just demands
> DBL_EPSILON <= 1e-9
> DBL_MAX >= 1e37
> DBL_MIN >= 1e-37
> which is why I asked for a "better" rationale than hoping that
> double equals IEEE double; or is it demanded that __STDC_IEC_559__
> (means: conforming with IEC559/IEEE754) is defined?
It's true that C doesn't specify IEEE754. However, assuming IEEE754
is used for double then the size is known.
In contrast, the extended format in IEEE754 doesn't give a specific
size at all, so then nothing is known.
--
Brian Gough
Network Theory Ltd,
Publishing Free Software Manuals --- http://www.network-theory.co.uk/
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