;------------------------------------------------------------------------------ | |
; | |
; Copyright (c) 2006 - 2008, 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.Asm | |
; | |
; Abstract: | |
; | |
; SetMem function | |
; | |
; Notes: | |
; | |
;------------------------------------------------------------------------------ | |
.code | |
;------------------------------------------------------------------------------ | |
; VOID * | |
; EFIAPI | |
; InternalMemSetMem ( | |
; IN VOID *Buffer, | |
; IN UINTN Count, | |
; IN UINT8 Value | |
; ) | |
;------------------------------------------------------------------------------ | |
InternalMemSetMem PROC USES rdi rbx | |
push rcx ; push Buffer | |
mov rax, r8 ; rax = Value | |
and rax, 0ffh ; rax = lower 8 bits of r8, upper 56 bits are 0 | |
mov ah, al ; ah = al | |
mov bx, ax ; bx = ax | |
shl rax, 10h ; rax = ax << 16 | |
mov ax, bx ; ax = bx | |
mov rbx, rax ; ebx = eax | |
shl rax, 20h ; rax = rax << 32 | |
or rax, rbx ; eax = ebx | |
mov rdi, rcx ; rdi = Buffer | |
mov rcx, rdx ; rcx = Count | |
shr rcx, 3 ; rcx = rcx / 8 | |
cld | |
rep stosq | |
mov rcx, rdx ; rcx = rdx | |
and rcx, 7 ; rcx = rcx & 7 | |
rep stosb | |
pop rax ; rax = Buffer | |
ret | |
InternalMemSetMem ENDP | |
END |