[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibSse2 / Ia32 / ZeroMem.S

//\r
// Include common header file for this module.\r
//\r
#include "CommonHeader.h"\r
\r
#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006, Intel Corporation\r
# All rights reserved. This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
# Module Name:\r
#\r
#   ZeroMem.asm\r
#\r
# Abstract:\r
#\r
#   ZeroMem function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
.globl _InternalMemZeroMem\r
\r
#------------------------------------------------------------------------------\r
#  VOID *\r
#  EFIAPI\r
#  InternalMemZeroMem (\r
#    IN VOID   *Buffer,\r
#    IN UINTN  Count\r
#    );\r
#------------------------------------------------------------------------------\r
_InternalMemZeroMem:\r
    push    %edi\r
    movl    8(%esp), %edi\r
    movl    12(%esp), %edx\r
    xorl    %ecx, %ecx\r
    subl    %edi, %ecx\r
    xorl    %eax, %eax\r
    andl    $15, %ecx\r
    jz      L0\r
    cmpl    %edx, %ecx\r
    cmova   %edx, %ecx\r
    subl    %ecx, %edx\r
    rep\r
    stosb\r
L0:\r
    movl    %edx, %ecx\r
    andl    $15, %edx\r
    shrl    $4, %ecx\r
    jz      L_ZeroBytes\r
    pxor    %xmm0, %xmm0\r
L1:\r
    movntdq %xmm0, (%edi)\r
    addl    $16, %edi\r
    loop    L1\r
    mfence\r
L_ZeroBytes:\r
    movl    %edx, %ecx\r
    rep\r
    stosb\r
    movl    8(%esp), %eax\r
    pop     %edi\r
    ret\r
Commit	Line	Data
e1f414b6	1	//\r
	2	// Include common header file for this module.\r
	3	//\r
	4	#include "CommonHeader.h"\r
	5	\r
	6	#------------------------------------------------------------------------------\r
	7	#\r
	8	# Copyright (c) 2006, Intel Corporation\r
	9	# All rights reserved. This program and the accompanying materials\r
	10	# are licensed and made available under the terms and conditions of the BSD License\r
	11	# which accompanies this distribution. The full text of the license may be found at\r
	12	# http://opensource.org/licenses/bsd-license.php\r
	13	#\r
	14	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	15	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	16	#\r
	17	# Module Name:\r
	18	#\r
	19	# ZeroMem.asm\r
	20	#\r
	21	# Abstract:\r
	22	#\r
	23	# ZeroMem function\r
	24	#\r
	25	# Notes:\r
	26	#\r
	27	#------------------------------------------------------------------------------\r
	28	\r
	29	.globl _InternalMemZeroMem\r
	30	\r
	31	#------------------------------------------------------------------------------\r
	32	# VOID *\r
	33	# EFIAPI\r
	34	# InternalMemZeroMem (\r
	35	# IN VOID *Buffer,\r
	36	# IN UINTN Count\r
	37	# );\r
	38	#------------------------------------------------------------------------------\r
	39	_InternalMemZeroMem:\r
	40	push %edi\r
	41	movl 8(%esp), %edi\r
	42	movl 12(%esp), %edx\r
	43	xorl %ecx, %ecx\r
	44	subl %edi, %ecx\r
	45	xorl %eax, %eax\r
	46	andl $15, %ecx\r
	47	jz L0\r
	48	cmpl %edx, %ecx\r
	49	cmova %edx, %ecx\r
	50	subl %ecx, %edx\r
	51	rep\r
	52	stosb\r
	53	L0:\r
	54	movl %edx, %ecx\r
	55	andl $15, %edx\r
	56	shrl $4, %ecx\r
	57	jz L_ZeroBytes\r
	58	pxor %xmm0, %xmm0\r
	59	L1:\r
	60	movntdq %xmm0, (%edi)\r
	61	addl $16, %edi\r
	62	loop L1\r
	63	mfence\r
	64	L_ZeroBytes:\r
65	movl %edx, %ecx\r
66	rep\r
67	stosb\r
68	movl 8(%esp), %eax\r
69	pop %edi\r
70	ret\r