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

Grazvydas Ignotas notasas at gmail.com
Mon May 1 22:26:49 UTC 2017


On Mon, May 1, 2017 at 11:29 PM, Eric Anholt <eric at anholt.net> wrote:

> 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.
>

Yeah I commented on earlier version of this. FWIW:

Reviewed-by: Grazvydas Ignotas <notasas at gmail.com>
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