MdePkg/Library/BaseMemoryLibSse2/Ia32/ScanMem8.nasm

;------------------------------------------------------------------------------
;
; 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:
;
;   ScanMem8.Asm
;
; Abstract:
;
;   ScanMem8 function
;
; Notes:
;
;   The following BaseMemoryLib instances contain the same copy of this file:
;
;       BaseMemoryLibRepStr
;       BaseMemoryLibMmx
;       BaseMemoryLibSse2
;       BaseMemoryLibOptDxe
;       BaseMemoryLibOptPei
;
;------------------------------------------------------------------------------

    SECTION .text

;------------------------------------------------------------------------------
; CONST VOID *
; EFIAPI
; InternalMemScanMem8 (
;   IN      CONST VOID                *Buffer,
;   IN      UINTN                     Length,
;   IN      UINT8                     Value
;   );
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemScanMem8)
ASM_PFX(InternalMemScanMem8):
    push    edi
    mov     ecx, [esp + 12]
    mov     edi, [esp + 8]
    mov     al, [esp + 16]
    repne   scasb
    lea     eax, [edi - 1]
    cmovnz  eax, ecx
    pop     edi
    ret