[x265] [PATCH 2 of 8] asm:intra_pred_ang4_3_sse2 improved ~2.5% 684.95 -> 667.49 with nits and tweaks

[chen]

need fix r3 performance problem

At 2015-03-29 06:18:49,chen <chenm003 at 163.com> wrote:

right

At 2015-03-29 05:35:20,dtyx265 at gmail.com wrote:
># HG changeset patch
># User David T Yuen <dtyx265 at gmail.com>
># Date 1427575220 25200
># Node ID 6595ba5f989fdd521e268911ddf027665a610e25
># Parent  1dfea2291d55ccb628a0f54d7d754812d77213ae
>asm:intra_pred_ang4_3_sse2 improved ~2.5% 684.95 -> 667.49 with nits and tweaks
>
>Corrected parameter count
>Changed r3 and r4 to r3d and r4d
>changed pshufd to psrldq
>
>diff -r 1dfea2291d55 -r 6595ba5f989f source/common/x86/intrapred8.asm
>--- a/source/common/x86/intrapred8.asm	Sat Mar 28 13:15:46 2015 -0700
>+++ b/source/common/x86/intrapred8.asm	Sat Mar 28 13:40:20 2015 -0700
>@@ -1338,11 +1338,11 @@
>     RET
> 
> INIT_XMM sse2
>-cglobal intra_pred_ang4_3, 3,5,8
>-    mov         r4, 1
>+cglobal intra_pred_ang4_3, 4,5,8
>+    mov         r4d, 1
>     cmp         r3m, byte 33
>-    mov         r3, 9
>-    cmove       r3, r4
>+    mov         r3d, 9
>+    cmove       r3d, r4d
> 
>     movh        m0, [r2 + r3]   ; [8 7 6 5 4 3 2 1]
>     mova        m1, m0
>@@ -1404,12 +1404,12 @@
> .store:
>     packuswb    m0, m2
>     movd        [r0], m0
>-    pshufd      m0, m0, 0x39
>+    psrldq      m0, 4
>     movd        [r0 + r1], m0
>-    pshufd      m0, m0, 0x39
>+    psrldq      m0, 4
>     movd        [r0 + r1 * 2], m0
>     lea         r1, [r1 * 3]
>-    pshufd      m0, m0, 0x39
>+    psrldq      m0, 4
>     movd        [r0 + r1], m0
>     RET
> 
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