MdePkg/Library/BaseMemoryLibOptDxe/Ia32/SetMem.nasm

;------------------------------------------------------------------------------
;
; Copyright (c) 2006, 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:
;
;------------------------------------------------------------------------------

    SECTION .text

;------------------------------------------------------------------------------
;  VOID *
;  InternalMemSetMem (
;    IN VOID   *Buffer,
;    IN UINTN  Count,
;    IN UINT8  Value
;    )
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemSetMem)
ASM_PFX(InternalMemSetMem):
    push    edi
    mov         ecx, [esp + 12]
    mov         al,  [esp + 16]
    mov         ah,  al
    shrd        edx, eax, 16
    shld        eax, edx, 16
    mov         edx, ecx
    mov         edi, [esp + 8]
    shr         ecx, 2
    rep stosd
    mov         ecx, edx
    and         ecx, 3
    rep stosb
    mov         eax, [esp + 8]
    pop     edi
    ret