Ronald S. Bultje 02ff360b33 Add sad64x64 and sad32x32 SSE2 versions.
Also port the 4x4, 16x16, 8x16 and 16x8 versions to x86inc.asm; this
makes them all slightly faster, particularly on x86-64. Remove SSE3
sad16x16 version, since the SSE2 version is now faster.

About 1.5% overall encoding speedup.

Change-Id: Id4011a78cce7839f554b301d0800d5ca021af797
2013-02-08 16:32:25 -08:00
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