[Mesa-dev] [PATCH 2/5] i965/fs: Don't [un]spill multiple registers at a time in SIMD8 mode

Jason Ekstrand jason at jlekstrand.net
Fri Oct 24 12:55:42 PDT 2014

On Oct 24, 2014 12:51 PM, "Matt Turner" <mattst88 at gmail.com> wrote:
> On Fri, Oct 24, 2014 at 12:25 PM, Jason Ekstrand <jason at jlekstrand.net>
> > I thought this would be a clever way to make spilling less expensive.
> > However, it appears that the oword read/write messages we are using for
> > spilling ignore the execution size and assume SIMD16 whenever working
> > more than one register.
> What do you mean by "assume SIMD16"?

>From reading the PRM it looks like it ignores the exec size and treats it
as 16-wide.  Also, this makes sense given my experiments.
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