MdePkg/Library/BaseMemoryLibSse2/Ia32/ScanMem64.asm

   1 //
   2 // Include common header file for this module.
   3 //
   4 #include "CommonHeader.h"
   5
   6 ;------------------------------------------------------------------------------
   7 ;
   8 ; Copyright (c) 2006, Intel Corporation
   9 ; All rights reserved. This program and the accompanying materials
  10 ; are licensed and made available under the terms and conditions of the BSD License
  11 ; which accompanies this distribution.  The full text of the license may be found at
  12 ; http://opensource.org/licenses/bsd-license.php
  13 ;
  14 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16 ;
  17 ; Module Name:
  18 ;
  19 ;   ScanMem64.Asm
  20 ;
  21 ; Abstract:
  22 ;
  23 ;   ScanMem64 function
  24 ;
  25 ; Notes:
  26 ;
  27 ;   The following BaseMemoryLib instances share the same version of this file:
  28 ;
  29 ;       BaseMemoryLibRepStr
  30 ;       BaseMemoryLibMmx
  31 ;       BaseMemoryLibSse2
  32 ;
  33 ;------------------------------------------------------------------------------
  34
  35     .686
  36     .model  flat,C
  37     .code
  38
  39 ;------------------------------------------------------------------------------
  40 ; CONST VOID *
  41 ; EFIAPI
  42 ; InternalMemScanMem64 (
  43 ;   IN      CONST VOID                *Buffer,
  44 ;   IN      UINTN                     Length,
  45 ;   IN      UINT64                    Value
  46 ;   );
  47 ;------------------------------------------------------------------------------
  48 InternalMemScanMem64    PROC    USES    edi
  49     mov     ecx, [esp + 12]
  50     mov     eax, [esp + 16]
  51     mov     edx, [esp + 20]
  52     mov     edi, [esp + 8]
  53 @@:
  54     cmp     eax, [edi]
  55     lea     edi, [edi + 8]
  56     loopne  @B
  57     jne     @F
  58     cmp     edx, [edi - 4]
  59     jecxz   @F
  60     jne     @B
  61 @@:
  62     lea     eax, [edi - 8]
  63     cmovne  eax, ecx
  64     ret
  65 InternalMemScanMem64    ENDP
  66
  67     END