MdePkg/Library/BaseMemoryLibMmx/X64/ZeroMem.S File Reference


Detailed Description

#
# ConvertAsm.py: Automatically generated from ZeroMem.asm
#
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.

# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
# ZeroMem.S
#
# Abstract:
#
# ZeroMem function
#
# Notes:
#
#------------------------------------------------------------------------------


#------------------------------------------------------------------------------
# VOID *
# InternalMemZeroMem (
# IN VOID *Buffer,
# IN UINTN Count
# );
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(InternalMemZeroMem)
ASM_PFX(InternalMemZeroMem):
pushq rdi
movq rcx, rdi
movq rdx, rcx
movq rdi, r8
andq $7, rdx
shrq $3, rcx
jz L_ZeroBytes
pxor mm0, mm0
L0:
movntq mm0, (rdi)
addq $8, rdi
loop L0
mfence
L_ZeroBytes:
xorl eax, eax
movl edx, ecx
rep stosb
movq r8, rax
popq rdi
ret



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