MdePkg/Library/BaseMemoryLibOptDxe/Ia32/ScanMem32.nasm

;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
;   ScanMem32.Asm
;
; Abstract:
;
;   ScanMem32 function
;
; Notes:
;
;   The following BaseMemoryLib instances contain the same copy of this file:
;
;       BaseMemoryLibRepStr
;       BaseMemoryLibMmx
;       BaseMemoryLibSse2
;       BaseMemoryLibOptDxe
;       BaseMemoryLibOptPei
;
;------------------------------------------------------------------------------

    SECTION .text

;------------------------------------------------------------------------------
; CONST VOID *
; EFIAPI
; InternalMemScanMem32 (
;   IN      CONST VOID                *Buffer,
;   IN      UINTN                     Length,
;   IN      UINT32                    Value
;   );
;------------------------------------------------------------------------------
global ASM_PFX(InternalMemScanMem32)
ASM_PFX(InternalMemScanMem32):
    push    edi
    mov     ecx, [esp + 12]
    mov     edi, [esp + 8]
    mov     eax, [esp + 16]
    repne   scasd
    lea     eax, [edi - 4]
    cmovnz  eax, ecx
    pop     edi
    ret