[Mesa-dev] [PATCH v2 04/52] intel/fs: Use ANY/ALL32 predicates in SIMD32

Matt Turner mattst88 at gmail.com
Tue Oct 17 19:05:31 UTC 2017

On 10/12, Jason Ekstrand wrote:
>We have ANY/ALL32 predicates and, for the most part, they work just
>fine.  (See the next commit for more details.)  Also, due to the way
>that flag registers are handled in hardware, instruction splitting is
>able to split the CMP correctly.  Specifically, that hardware looks at
>the execution group and knows to shift it's flag usage up correctly so a
>2H instruction will write to f0.1 instead of f0.0.
>Cc: mesa-stable at lists.freedesktop.org

Reviewed-by: Matt Turner <mattst88 at gmail.com>
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