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Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- From: Janis Johnson <janis187 at us dot ibm dot com>
- To: linas at austin dot ibm dot com
- Cc: David Edelsohn <dje at watson dot ibm dot com>, Jakub Jelinek <jakub at redhat dot com>, gcc-patches at gcc dot gnu dot org, gcc at gcc dot gnu dot org
- Date: Fri, 13 Jun 2003 15:17:53 -0700
- Subject: Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- References: <jakub@redhat.com> <200306132009.QAA28822@makai.watson.ibm.com> <20030613160225.C24682@forte.austin.ibm.com>
On Fri, Jun 13, 2003 at 04:02:25PM -0500, linas@austin.ibm.com wrote:
> Bird in hand vs. two in the bush. We have Alan Modra's patch now, we
> don't have an acceptable -mno-implicit-float patch.
>
> There is concern that Alan's patch will negatively impact performance
> of fp code. Is there a way to unambiguously resolve this issue, or
> at least resolve it to everyones satisfaction?
>
> How would one do this? Visually inspect generated fp code? Run
> benchmarks? Which benchmarks?
Try the floating point tests from SPEC CPU2000.
Janis