[Mesa-dev] [PATCH 2/4] gallium: Enable ARM NEON CPU detection.

Eric Anholt eric at anholt.net
Mon May 1 20:29:38 UTC 2017


Eric Anholt <eric at anholt.net> writes:

> I wrote this code with reference to pixman, though I've only decided to
> cover Linux (what I'm testing) and Android (seems obvious enough).  Linux
> has getauxval() as a cleaner interface to the /proc entry, but it's more
> glibc-specific and I didn't want to add detection for that.
>
> This will be used to enable NEON at runtime on ARMv6 builds of vc4.
>
> v2: Actually initialize the temp vars in the Android path (noticed by
>     daniels)
> v3: Actually pull in the cpufeatures library (change by robher).
>     Use O_CLOEXEC.  Break out of the loop when we find our feature.
> v4: Drop VFP code, which was confused about what it was detecting and not
>     actually used yet.

Ping on review of this one.  Clearly several people have looked at it,
so if I don't hear something soon I'll probably push.
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