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Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- To: gcc at gcc dot gnu dot org
- Subject: Re: What is acceptable for -ffast-math? (Was: associative law in combine)
- From: Per Abrahamsen <abraham at dina dot kvl dot dk>
- Date: 03 Aug 2001 15:12:47 +0200
- Organization: The Church of Emacs
- References: <20010731142629.275BFF2B53@nile.gnat.com>
> Well it sure would be nice to here from some of these mythical numerical
> programmers (I don't care if they are writing games or nuclear reactor codes)
> who would be happier, so far we haven't heard this!
I'm writing agricultural simulations, and I'd be happy to get
transformations enabled with -ffast-math that would be safe with real
numbers, but not with floating point numbers.
And I'm one of those incompetant programmers that are forced to write
a * b + a * c rather than a * (b + c), when the former is easier to
understand, i.e. closer to the original problem. Otherwise my small
brain can simply not grasp what the code was meant to signify, when I
reread it later.
So we aren't quite mythical. Maybe we really ought to be shoot and
replaced by Real Programmers(TM), but there seem to be a shortage of
those, so that is not likely to happen soon.
 See <URL: http://www.dina.kvl.dk/~daisy/ >.