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Re: Second Draft "Unsafe fp optimizations" project description.
- To: dewar at gnat dot com
- Subject: Re: Second Draft "Unsafe fp optimizations" project description.
- From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
- Date: Tue, 07 Aug 2001 23:18:04 +0200
- CC: gcc at gcc dot gnu dot org
- Organization: Moene Computational Physics, Maartensdijk, The Netherlands
- References: <20010807004619.0ACD5F2B88@nile.gnat.com>
> <<E.g., if we want to say that optimization -fblah will cause overflow
> when the inputs to the (transformed) expression are in the subset X of
> all representable floating point numbers, we have to assume a model - my
> suggestion is to use the IEEE-754 model.
> But this is meaningless, there *is* no "IEEE-754" model for evaluation of
> floating-point expressions in high level languages. So this model needs
> a lot of filling out. I refer again to Sam Figueroa's PhD thesis which is
> all about such models.
Ah, OK - I see what you mean now. I have some hours on Friday to visit
the nearest University Library (University of Utrecht). Presumably
they do not have that thesis, but there probably is a book that
discusses/uses his results. Do you have a suggestion ? Thanks.
[ Yesterday I promised to send in a third revision of the proposed web
page today - unfortunately, I'm too tired to do a good job on it, so
it'll have to wait. ]
Toon Moene - mailto:email@example.com - phoneto: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)