openh264/codec/encoder/core/asm/memzero.asm

;*!
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;*     Copyright (c)  2009-2013, Cisco Systems
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;*
;*     Redistribution and use in source and binary forms, with or without
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;*          notice, this list of conditions and the following disclaimer.
;*
;*        * Redistributions in binary form must reproduce the above copyright
;*          notice, this list of conditions and the following disclaimer in
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;*     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;*     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;*     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
;*     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
;*     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;*     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
;*     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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;*     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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;*
;*
;*  memzero.asm
;*
;*  Abstract
;*
;*
;*  History
;*      9/16/2009 Created
;*
;*
;*************************************************************************/

%include "asm_inc.asm"
;***********************************************************************
; Code
;***********************************************************************

SECTION .text

ALIGN 16
;***********************************************************************
;void WelsPrefetchZero_mmx(int8_t const*_A);
;***********************************************************************
WELS_EXTERN WelsPrefetchZero_mmx
WelsPrefetchZero_mmx:
	%assign  push_num 0
	LOAD_1_PARA
	prefetchnta [r0]
	ret


ALIGN 16
;***********************************************************************
;   void WelsSetMemZeroAligned64_sse2(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroAligned64_sse2
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

ALIGN 16
;***********************************************************************
;   void WelsSetMemZeroSize64_mmx(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroSize64_mmx
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

ALIGN 16
;***********************************************************************
;   void WelsSetMemZeroSize8_mmx(void *dst, int32_t size)
;***********************************************************************
WELS_EXTERN WelsSetMemZeroSize8_mmx
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