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Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- From: linas at austin dot ibm dot com
- To: David Edelsohn <dje at watson dot ibm dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Fri, 13 Jun 2003 16:06:05 -0500
- Subject: Re: ppc64 floating point usage [was Re: PPC64 Compiler bug !!]
- References: <amodra@bigpond.net.au> <200306132000.QAA28128@makai.watson.ibm.com>
On Fri, Jun 13, 2003 at 04:00:39PM -0400, David Edelsohn wrote:
> Have you tested the change in allocation order patch on floating
> point intensive code?
>
> How does this affect the register allocation for moves of floating
> point values? Does GCC now prefer GPRs?
I'll see if I can get a copy of Alan's compiler. I can do some simple
visual inspection of the fp code that it generates, but I suspect this
won't be sufficient to make the patch aceptable. What would be? Some
perf tests?
--linas
>
> David