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Re: Add minimal traceback table and prefetch to rs6000.
- From: Richard Henderson <rth at redhat dot com>
- To: David Edelsohn <dje at watson dot ibm dot com>
- Cc: Dale Johannesen <dalej at apple dot com>, gcc-patches at gcc dot gnu dot org
- Date: Wed, 16 Jan 2002 02:23:09 -0800
- Subject: Re: Add minimal traceback table and prefetch to rs6000.
- References: <rth@redhat.com> <200201160338.WAA29700@makai.watson.ibm.com>
On Tue, Jan 15, 2002 at 10:38:36PM -0500, David Edelsohn wrote:
> Are you suggesting that PREFETCH for PowerPC force the mode of the
> operand to a vector mode?
Yes. Or any other mode that has the same reg+reg restrictions.
> Can one use a vector mode without enabling the rest of Altivec
> machinery and without confusing the rest of the backend?
I think so. You can't access them from the source level, since
VECTOR_MODE_SUPPORTED_P will return false, but I can't think of
anything that would prevent them from being used at the rtl level.
r~