Vincent Rabaud 55403a9a5a Upsampling SSE2/SSE4 speedup.
RGB to YUV conversion was not using SSE to finish up the row.
End data is now copied to a buffer big enough to fit in a
SSE register.
(UPSAMPLE_LAST_BLOCK was already using that trick).

Change-Id: Ie539bcbe570a643a774aa88263503c0d2c41890f
2017-12-05 23:37:06 +01:00
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