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Re: SPEC 2000 results on PowerPC
- From: Toon Moene <toon at moene dot indiv dot nluug dot nl>
- To: Dale Johannesen <dalej at apple dot com>
- Cc: Mark Mitchell <mark at codesourcery dot com>, gcc at gcc dot gnu dot org
- Date: Tue, 17 Aug 2004 22:26:02 +0200
- Subject: Re: SPEC 2000 results on PowerPC
- Organization: Moene Computational Physics, Maartensdijk, NL
- References: <41223D86.5000708@codesourcery.com> <518E35ED-F079-11D8-8E24-000A95D7CD40@apple.com>
Dale Johannesen wrote:
The hot code in wupwise is zgemm.f, loops ending 70 and 100, and
zaxpy.f, loop 30.
Multiply-add insns are very important.
Which you won't get unless using -ffast-math.
--
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
A maintainer of GNU Fortran 95: http://gcc.gnu.org/fortran/