[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibSse2 / X64 / CompareMem.S

#\r
# ConvertAsm.py: Automatically generated from CompareMem.asm\r
#\r
#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006 - 2008, 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
#   CompareMem.S\r
#\r
# Abstract:\r
#\r
#   CompareMem function\r
#\r
# Notes:\r
#\r
#   The following BaseMemoryLib instances contain the same copy of this file:\r
#\r
#       BaseMemoryLibRepStr\r
#       BaseMemoryLibMmx\r
#       BaseMemoryLibSse2\r
#       BaseMemoryLibOptDxe\r
#       BaseMemoryLibOptPei\r
#\r
#------------------------------------------------------------------------------\r
\r
\r
#------------------------------------------------------------------------------\r
# INTN\r
# EFIAPI\r
# InternalMemCompareMem (\r
#   IN      CONST VOID                *DestinationBuffer,\r
#   IN      CONST VOID                *SourceBuffer,\r
#   IN      UINTN                     Length\r
#   );\r
#------------------------------------------------------------------------------\r
.intel_syntax noprefix\r
.globl ASM_PFX(InternalMemCompareMem)\r
ASM_PFX(InternalMemCompareMem):\r
    push    rsi\r
    push    rdi\r
    mov     rsi, rcx\r
    mov     rdi, rdx\r
    mov     rcx, r8\r
    repe    cmpsb\r
    movzx   rax, byte ptr [rsi - 1]\r
    movzx   rdx, byte ptr [rdi - 1]\r
    sub     rax, rdx\r
    pop     rdi\r
    pop     rsi\r
    ret\r
\r
Commit	Line	Data
b1ff428c	1	#\r
	2	# ConvertAsm.py: Automatically generated from CompareMem.asm\r
	3	#\r
	4	#------------------------------------------------------------------------------\r
	5	#\r
373ade0e	6	# Copyright (c) 2006 - 2008, Intel Corporation\r
b1ff428c	7	# All rights reserved. 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	# CompareMem.S\r
	18	#\r
	19	# Abstract:\r
	20	#\r
	21	# CompareMem function\r
	22	#\r
	23	# Notes:\r
	24	#\r
	25	# The following BaseMemoryLib instances contain the same copy of this file:\r
	26	#\r
	27	# BaseMemoryLibRepStr\r
	28	# BaseMemoryLibMmx\r
	29	# BaseMemoryLibSse2\r
	30	# BaseMemoryLibOptDxe\r
	31	# BaseMemoryLibOptPei\r
	32	#\r
	33	#------------------------------------------------------------------------------\r
	34	\r
	35	\r
	36	#------------------------------------------------------------------------------\r
	37	# INTN\r
	38	# EFIAPI\r
	39	# InternalMemCompareMem (\r
	40	# IN CONST VOID *DestinationBuffer,\r
	41	# IN CONST VOID *SourceBuffer,\r
	42	# IN UINTN Length\r
	43	# );\r
	44	#------------------------------------------------------------------------------\r
	45	.intel_syntax noprefix\r
	46	.globl ASM_PFX(InternalMemCompareMem)\r
	47	ASM_PFX(InternalMemCompareMem):\r
	48	push rsi\r
	49	push rdi\r
	50	mov rsi, rcx\r
	51	mov rdi, rdx\r
	52	mov rcx, r8\r
	53	repe cmpsb\r
	54	movzx rax, byte ptr [rsi - 1]\r
	55	movzx rdx, byte ptr [rdi - 1]\r
	56	sub rax, rdx\r
	57	pop rdi\r
	58	pop rsi\r
	59	ret\r
	60	\r