[x265] [PATCH] asm: correct improper stress test cases, modify algorithm of addAvg 16bpp

[chen]

At 2014-02-24 19:44:34,dnyaneshwar at multicorewareinc.com wrote:
># HG changeset patch
># User Dnyaneshwar G <dnyaneshwar at multicorewareinc.com>
># Date 1393241924 -19800
>#      Mon Feb 24 17:08:44 2014 +0530
># Node ID f2872795807a3150d30397a3cab417ef9140a7fa
># Parent  57ce7f0f4f4cbb9acd401751e8bef7b522774e38
>asm: correct improper stress test cases, modify algorithm of addAvg 16bpp
>
>+    pxor          m0,          m0
>+    pmaxsw        m1,          m0
>+    pminsw        m1,          [pw_1023]
packusdw + pminuw may reduce 0.33 cycles or 1 uops 
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