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Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- From: Eric Christopher <echristo at redhat dot com>
- To: David Edelsohn <dje at watson dot ibm dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Fri, 08 Aug 2003 19:23:01 -0700
- Subject: Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- References: <200308081401.KAA27398@makai.watson.ibm.com>
David,
>
> Alan> * config/rs6000/rs6000.md (fctiwz): Don't ignore fpr preference.
> Alan> (floatdidf2, fix_truncdfdi2, floatdisf2_internal1): Likewise.
> Alan> (floatditf2, fix_trunctfdi2): Likewise.
>
> Removing the ignore flag on all of the patterns is incorrect.
> This activity continues to fix symptoms instead of problems.
I always reserve the right to be mistaken, but from my reading of the
ppc instruction set the change looks good to me since those instructions
require a floating point register. Perhaps could you explain more
please?
-eric
--
Eric Christopher <echristo@redhat.com>