MdePkg/Library/BaseMemoryLibRepStr/Ia32/ScanMem64.s

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, Intel Corporation
   4 # All rights reserved. This program and the accompanying materials
   5 # are licensed and made available under the terms and conditions of the BSD License
   6 # which accompanies this distribution.  The full text of the license may be found at
   7 # http://opensource.org/licenses/bsd-license.php
   8 #
   9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #
  12 # Module Name:
  13 #
  14 #   ScanMem64.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   ScanMem64 function
  19 #
  20 # Notes:
  21 #
  22 #   The following BaseMemoryLib instances share the same version of this file:
  23 #
  24 #       BaseMemoryLibRepStr
  25 #       BaseMemoryLibMmx
  26 #       BaseMemoryLibSse2
  27 #
  28 #------------------------------------------------------------------------------
  29
  30     .686:
  31     .code:
  32
  33 .global _InternalMemScanMem64
  34 _InternalMemScanMem64:
  35     push    %edi
  36     movl    12(%esp),%ecx
  37     movl    16(%esp),%eax
  38     movl    20(%esp),%edx
  39     movl    8(%esp),%edi
  40 L0:
  41     cmpl    (%edi),%eax
  42     leal    8(%edi),%edi
  43     loopne  L0
  44     jne     L1
  45     cmpl    -4(%edi),%edx
  46     jecxz   L1
  47     jne     L0
  48 L1:
  49     leal    -8(%edi),%eax
  50     cmovne  %ecx, %eax
  51     pop     %edi
  52     ret
  53