[FFmpeg-devel] [PATCH] Better AV_ZERO128 on x86

[Jason Garrett-Glaser]

This patch makes AV_ZERO work under SSE, instead of requiring SSE2.

But AV_ZERO still sucks, because it duplicates the pxor/xorps every
single time it runs.  Is there any reason we can't do what x264 does,
that is, use intrinsics like ((__m128){0,0,0,0}) to solve the problem?
 This does make gcc (even crappy old gcc) reuse the value instead of
calculating it every time.

Jason
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