#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> | |
# 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: | |
# | |
# SetMem.S | |
# | |
# Abstract: | |
# | |
# SetMem function | |
# | |
# Notes: | |
# | |
#------------------------------------------------------------------------------ | |
#------------------------------------------------------------------------------ | |
# VOID * | |
# EFIAPI | |
# InternalMemSetMem ( | |
# IN VOID *Buffer, | |
# IN UINTN Count, | |
# IN UINT8 Value | |
# ) | |
#------------------------------------------------------------------------------ | |
ASM_GLOBAL ASM_PFX(InternalMemSetMem) | |
ASM_PFX(InternalMemSetMem): | |
pushq %rdi | |
pushq %rbx | |
pushq %rcx # push Buffer | |
movq %r8, %rax # rax = Value | |
andq $0xff, %rax # rax = lower 8 bits of r8, upper 56 bits are 0 | |
movb %al, %ah # ah = al | |
movw %ax, %bx # bx = ax | |
shlq $0x10, %rax # rax = ax << 16 | |
movw %bx, %ax # ax = bx | |
movq %rax, %rbx # ebx = eax | |
shlq $0x20, %rax # rax = rax << 32 | |
orq %rbx, %rax # eax = ebx | |
movq %rcx, %rdi # rdi = Buffer | |
movq %rdx, %rcx # rcx = Count | |
shrq $3, %rcx # rcx = rcx / 8 | |
cld | |
rep stosq | |
movq %rdx, %rcx # rcx = rdx | |
andq $7, %rcx # rcx = rcx & 7 | |
rep stosb | |
popq %rax # rax = Buffer | |
popq %rbx | |
popq %rdi | |
ret |