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Re: [Help-gsl] compiler fast math options
From: |
Brian Gough |
Subject: |
Re: [Help-gsl] compiler fast math options |
Date: |
Tue, 1 Mar 2005 16:45:07 +0000 |
Nathan Moore writes:
> I'm working on a project which will use GSL integration routines and
> random number generators. In the interest of code execution speed, I'm
> wondering if GSL is picky about the standard Math library.
> Specifically, I've read in the past that if you're not concerned about
> (1) the inclusion of extra precision or (2) you code doesn't rely on an
> error flag when it encounters something like sqrt(-3.25) then there' is
> no real risk in enabling the "fast-math" option in the compiler.
The -ffast-math option is not recommended for use with GSL. If you
build the library with that option the "make check" test suite will
fail.
--
regards,
Brian Gough
Network Theory Ltd,
Commercial support for GSL --- http://www.network-theory.co.uk/gsl/
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