MdePkg/Library/BaseMemoryLibSse2/Ia32/SetMem16.S File Reference
Detailed Description
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, 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:
#
#
SetMem16.asm
#
# Abstract:
#
# SetMem16 function
#
# Notes:
#
#------------------------------------------------------------------------------
ASM_GLOBAL
ASM_PFX(InternalMemSetMem16)
#------------------------------------------------------------------------------
# VOID *
# EFIAPI
# InternalMemSetMem16 (
# IN VOID *Buffer,
# IN UINTN Count,
# IN UINT16 Value
# )
#------------------------------------------------------------------------------
ASM_PFX(InternalMemSetMem16):
push edi
movl 12(esp), edx
movl 8(esp), edi
xorl ecx, ecx
subl edi, ecx
andl $15, ecx # ecx + edi aligns on 16-byte boundary
movl 16(esp), eax
jz L0
shrl ecx
cmpl edx, ecx
cmova edx, ecx
subl ecx, edx
rep
stosw
L0:
movl edx, ecx
andl $7, edx
shrl $3, ecx
jz L_SetWords
movd eax, xmm0
pshuflw $0, xmm0, xmm0
movlhps xmm0, xmm0
L1:
movntdq xmm0, (edi)
addl $16, edi
loop L1
mfence
L_SetWords:
movl edx, ecx
rep
stosw
movl 8(esp), eax
pop edi
ret