[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibMmx / X64 / ZeroMem.S

#\r
# ConvertAsm.py: Automatically generated from ZeroMem.asm\r
#\r
#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
# 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.S\r
#\r
# Abstract:\r
#\r
#   ZeroMem function\r
#\r
# Notes:\r
#\r
#------------------------------------------------------------------------------\r
\r
\r
#------------------------------------------------------------------------------\r
#  VOID *\r
#  InternalMemZeroMem (\r
#    IN VOID   *Buffer,\r
#    IN UINTN  Count\r
#    );\r
#------------------------------------------------------------------------------\r
ASM_GLOBAL ASM_PFX(InternalMemZeroMem)\r
ASM_PFX(InternalMemZeroMem):\r
    pushq   %rdi\r
    movq    %rcx, %rdi\r
    movq    %rdx, %rcx\r
    movq    %rdi, %r8\r
    andq    $7, %rdx\r
    shrq    $3, %rcx\r
    jz      L_ZeroBytes\r
    pxor    %mm0, %mm0\r
L0:\r
    movntq  %mm0, (%rdi)\r
    addq    $8, %rdi\r
    loop    L0\r
    mfence\r
L_ZeroBytes:\r
    xorl    %eax, %eax\r
    movl    %edx, %ecx\r
    rep     stosb\r
    movq    %r8, %rax\r
    popq    %rdi\r
    ret\r
\r
Commit	Line	Data
	1	#\r
	2	# ConvertAsm.py: Automatically generated from ZeroMem.asm\r
	3	#\r
	4	#------------------------------------------------------------------------------\r
	5	#\r
	6	# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
	7	# This program and the accompanying materials\r
	8	# are licensed and made available under the terms and conditions of the BSD License\r
	9	# which accompanies this distribution. The full text of the license may be found at\r
	10	# http://opensource.org/licenses/bsd-license.php.\r
	11	#\r
	12	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	#\r
	15	# Module Name:\r
	16	#\r
	17	# ZeroMem.S\r
	18	#\r
	19	# Abstract:\r
	20	#\r
	21	# ZeroMem function\r
	22	#\r
	23	# Notes:\r
	24	#\r
	25	#------------------------------------------------------------------------------\r
	26	\r
	27	\r
	28	#------------------------------------------------------------------------------\r
	29	# VOID *\r
	30	# InternalMemZeroMem (\r
	31	# IN VOID *Buffer,\r
	32	# IN UINTN Count\r
	33	# );\r
	34	#------------------------------------------------------------------------------\r
	35	ASM_GLOBAL ASM_PFX(InternalMemZeroMem)\r
	36	ASM_PFX(InternalMemZeroMem):\r
	37	pushq %rdi\r
	38	movq %rcx, %rdi\r
	39	movq %rdx, %rcx\r
	40	movq %rdi, %r8\r
	41	andq $7, %rdx\r
	42	shrq $3, %rcx\r
	43	jz L_ZeroBytes\r
	44	pxor %mm0, %mm0\r
	45	L0:\r
	46	movntq %mm0, (%rdi)\r
	47	addq $8, %rdi\r
	48	loop L0\r
	49	mfence\r
	50	L_ZeroBytes:\r
	51	xorl %eax, %eax\r
	52	movl %edx, %ecx\r
	53	rep stosb\r
	54	movq %r8, %rax\r
	55	popq %rdi\r
	56	ret\r
	57	\r