[x265] [PATCH] blockcopy_pp_8x64: sse2 asm code optimization

[chen]

8xN is right


At 2015-02-03 21:07:25,praveen at multicorewareinc.com wrote:
># HG changeset patch
># User Praveen Tiwari
># Date 1422968834 -19800
># Node ID 6aba648bfada606d14f20e0a7cdb667d043069ae
># Parent  a7dff1040961c2c17254c2e2bb0bf5b7857c8187
>blockcopy_pp_8x64: sse2 asm code optimization
>
>improved, 800.38c -> 752.18c
>
>diff -r a7dff1040961 -r 6aba648bfada source/common/x86/blockcopy8.asm
>--- a/source/common/x86/blockcopy8.asm	Tue Feb 03 18:26:22 2015 +0530
>+++ b/source/common/x86/blockcopy8.asm	Tue Feb 03 18:37:14 2015 +0530
>@@ -482,48 +482,38 @@
>     RET
> 
> ;-----------------------------------------------------------------------------
>-; void blockcopy_pp_%1x%2(pixel* dst, intptr_t dstStride, const pixel* src, intptr_t srcStride)
>+; void blockcopy_pp_8x64(pixel* dst, intptr_t dstStride, const pixel* src, intptr_t srcStride)
> ;-----------------------------------------------------------------------------
>-%macro BLOCKCOPY_PP_W8_H8 2
> INIT_XMM sse2
>-cglobal blockcopy_pp_%1x%2, 4, 5, 6
>-    mov         r4d,       %2/8
>-
>-.loop:
>-     movh    m0,     [r2]
>-     movh    m1,     [r2 + r3]
>-     lea     r2,     [r2 + 2 * r3]
>-     movh    m2,     [r2]
>-     movh    m3,     [r2 + r3]
>-     lea     r2,     [r2 + 2 * r3]
>-     movh    m4,     [r2]
>-     movh    m5,     [r2 + r3]
>-
>-     movh    [r0],         m0
>-     movh    [r0 + r1],    m1
>-     lea     r0,           [r0 + 2 * r1]
>-     movh    [r0],         m2
>-     movh    [r0 + r1],    m3
>-     lea     r0,           [r0 + 2 * r1]
>-     movh    [r0],         m4
>-     movh    [r0 + r1],    m5
>-
>-     lea     r2,           [r2 + 2 * r3]
>-     movh    m4,           [r2]
>-     movh    m5,           [r2 + r3]
>-     lea     r0,           [r0 + 2 * r1]
>-     movh    [r0],         m4
>-     movh    [r0 + r1],    m5
>-
>-     dec     r4d
>-     lea     r0,           [r0 + 2 * r1]
>-     lea     r2,           [r2 + 2 * r3]
>-     jnz    .loop
>-RET
>-%endmacro
>-
>-
>-BLOCKCOPY_PP_W8_H8 8, 64
>+cglobal blockcopy_pp_8x64, 4, 6, 4
>+
>+    lea      r4, [3 * r3]
>+    lea      r5, [3 * r1]
>+
>+    movh     m0, [r2]
>+    movh     m1, [r2 + r3]
>+    movh     m2, [r2 + 2 * r3]
>+    movh     m3, [r2 + r4]
>+
>+    movh     [r0],          m0
>+    movh     [r0 + r1],     m1
>+    movh     [r0 + 2 * r1], m2
>+    movh     [r0 + r5],     m3
>+
>+    %rep 15
>+    lea      r2, [r2 + 4 * r3]
>+    movh     m0, [r2]
>+    movh     m1, [r2 + r3]
>+    movh     m2, [r2 + 2 * r3]
>+    movh     m3, [r2 + r4]
>+
>+    lea      r0,            [r0 + 4 * r1]
>+    movh     [r0],          m0
>+    movh     [r0 + r1],     m1
>+    movh     [r0 + 2 * r1], m2
>+    movh     [r0 + r5],     m3
>+    %endrep
>+    RET
> 
> ;-----------------------------------------------------------------------------
> ; void blockcopy_pp_%1x%2(pixel* dst, intptr_t dstStride, const pixel* src, intptr_t srcStride)
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