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G5 fpu optimizations for g77 3.4???
- From: Jack Howarth <howarth at nitro dot med dot uc dot edu>
- To: gcc at gcc dot gnu dot org
- Date: Tue, 21 Oct 2003 10:33:09 -0400 (EDT)
- Subject: G5 fpu optimizations for g77 3.4???
I was wondering if anyone knew the exact state of fpu scheduling
optimizations in g77 of the current gcc 3.4 tree? I ask because
the current gcc 3.1 compiled g77 code shows marginal performance on
a dual G5. My understanding is that the G5 is the first desktop
ppc with two fpu's per processor and will require specific fpu
scheduling changes to be implemented. Is this really the case and
what flags are operational in current gcc 3.4 g77 to do this?
Thanks in advance for any advice.
Jack
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Jack W. Howarth, Ph.D. 231 Albert Sabin Way
NMR Facility Director Cincinnati, Ohio 45267-0524
Dept. of Molecular Genetics phone: (513) 558-4420
Univ. of Cincinnati College of Medicine fax: (513) 558-8474