[x265] [PATCH] blockcopy_pp_2x8 SSE2 asm code: optimize LEA instruction

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At 2015-02-05 17:17:03,praveen at multicorewareinc.com wrote:
># HG changeset patch
># User Praveen Tiwari
># Date 1423127814 -19800
># Node ID 6843cdeae82b7429eedee297c33b0eb6b49401a2
># Parent  cd4117a34a19a76d0462c9a644ecc728d8e1c0ee
>blockcopy_pp_2x8 SSE2 asm code: optimize LEA instruction
>
>diff -r cd4117a34a19 -r 6843cdeae82b source/common/x86/blockcopy8.asm
>--- a/source/common/x86/blockcopy8.asm	Thu Feb 05 12:27:23 2015 +0530
>+++ b/source/common/x86/blockcopy8.asm	Thu Feb 05 14:46:54 2015 +0530
>@@ -63,37 +63,29 @@
> ;-----------------------------------------------------------------------------
> INIT_XMM sse2
> cglobal blockcopy_pp_2x8, 4, 7, 0
>-    mov     r4w,     [r2]
>-    mov     r5w,     [r2 + r3]
>-    mov     r6w,     [r2 + 2 * r3]
>-
>-    mov     [r0],            r4w
>-    mov     [r0 + r1],       r5w
>-    mov     [r0 + 2 * r1],   r6w
>-
>-    lea     r0,             [r0 + 2 * r1]
>-    lea     r2,             [r2 + 2 * r3]
>-
>-    mov     r4w,             [r2 + r3]
>-    mov     r5w,             [r2 + 2 * r3]
>-
>-    mov     [r0 + r1],       r4w
>-    mov     [r0 + 2 * r1],   r5w
>-
>-    lea     r0,              [r0 + 2 * r1]
>-    lea     r2,              [r2 + 2 * r3]
>-
>-    mov     r4w,             [r2 + r3]
>-    mov     r5w,             [r2 + 2 * r3]
>-
>-    mov     [r0 + r1],       r4w
>-    mov     [r0 + 2 * r1],   r5w
>-
>-    lea     r0,              [r0 + 2 * r1]
>-    lea     r2,              [r2 + 2 * r3]
>-
>-    mov     r4w,             [r2 + r3]
>-    mov     [r0 + r1],       r4w
>+    lea     r5,      [3 * r1]
>+    lea     r6,      [3 * r3]
>+
>+    mov     r4w,           [r2]
>+    mov     [r0],          r4w
>+    mov     r4w,           [r2 + r3]
>+    mov     [r0 + r1],     r4w
>+    mov     r4w,           [r2 + 2 * r3]
>+    mov     [r0 + 2 * r1], r4w
>+    mov     r4w,           [r2 + r6]
>+    mov     [r0 + r5],     r4w
>+
>+    lea     r2,            [r2 + 4 * r3]
>+    mov     r4w,           [r2]
>+    lea     r0,            [r0 + 4 * r1]
>+    mov     [r0],          r4w
>+
>+    mov     r4w,           [r2 + r3]
>+    mov     [r0 + r1],     r4w
>+    mov     r4w,           [r2 + 2 * r3]
>+    mov     [r0 + 2 * r1], r4w
>+    mov     r4w,           [r2 + r6]
>+    mov     [r0 + r5],     r4w
>     RET
> 
> ;-----------------------------------------------------------------------------
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