[Mesa-dev] [PATCH 1/2] mesa: Add a streaming load memcpy implementation.

Eric Anholt eric at anholt.net
Wed Nov 6 14:44:56 PST 2013

Matt Turner <mattst88 at gmail.com> writes:

> Uses SSE 4.1's MOVNTDQA instruction (streaming load) to read from
> uncached memory without polluting the cache.
> ---
> We should add runtime detection support later.

I'd really like to see runtime detection with this.  Effectively not
supporting this on 32-bit sucks, and doing it this way will encourage
people to use compiler flags to get this path, even when those compiler
flags hurt performance in general (in my testing, at least).
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