ref: 55b3ec0bab55921f5c35ddec92de4742aa0ee346
dir: /codec/encoder/core/x86/memzero.asm/
;*!
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;* notice, this list of conditions and the following disclaimer.
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;* * Redistributions in binary form must reproduce the above copyright
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;* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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;*
;* memzero.asm
;*
;* Abstract
;*
;*
;* History
;* 9/16/2009 Created
;*
;*
;*************************************************************************/
%include "asm_inc.asm"
;***********************************************************************
; Code
;***********************************************************************
SECTION .text
;***********************************************************************
;void WelsPrefetchZero_mmx(int8_t const*_A);
;***********************************************************************
WELS_EXTERN WelsPrefetchZero_mmx
%assign push_num 0
LOAD_1_PARA
prefetchnta [r0]
ret
;***********************************************************************
; void WelsSetMemZeroAligned64_sse2(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroAligned64_sse2
%assign push_num 0
LOAD_2_PARA
SIGN_EXTENSION r1, r1d
neg r1
pxor xmm0, xmm0
.memzeroa64_sse2_loops:
movdqa [r0], xmm0
movdqa [r0+16], xmm0
movdqa [r0+32], xmm0
movdqa [r0+48], xmm0
add r0, 0x40
add r1, 0x40
jnz near .memzeroa64_sse2_loops
ret
;***********************************************************************
; void WelsSetMemZeroSize64_mmx(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroSize64_mmx
%assign push_num 0
LOAD_2_PARA
SIGN_EXTENSION r1, r1d
neg r1
pxor mm0, mm0
.memzero64_mmx_loops:
movq [r0], mm0
movq [r0+8], mm0
movq [r0+16], mm0
movq [r0+24], mm0
movq [r0+32], mm0
movq [r0+40], mm0
movq [r0+48], mm0
movq [r0+56], mm0
add r0, 0x40
add r1, 0x40
jnz near .memzero64_mmx_loops
WELSEMMS
ret
;***********************************************************************
; void WelsSetMemZeroSize8_mmx(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroSize8_mmx
%assign push_num 0
LOAD_2_PARA
SIGN_EXTENSION r1, r1d
neg r1
pxor mm0, mm0
.memzero8_mmx_loops:
movq [r0], mm0
add r0, 0x08
add r1, 0x08
jnz near .memzero8_mmx_loops
WELSEMMS
ret