MdePkg/Library/BaseMemoryLibSse2/Ia32/ScanMem64.S

   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 .globl _InternalMemScanMem64
  36
  37 #------------------------------------------------------------------------------
  38 # CONST VOID *
  39 # EFIAPI
  40 # InternalMemScanMem64 (
  41 #   IN      CONST VOID                *Buffer,
  42 #   IN      UINTN                     Length,
  43 #   IN      UINT64                    Value
  44 #   );
  45 #------------------------------------------------------------------------------
  46 _InternalMemScanMem64:
  47     push    %edi
  48     movl    12(%esp), %ecx
  49     movl    16(%esp), %eax
  50     movl    20(%esp), %edx
  51     movl    8(%esp), %edi
  52 L0:
  53     cmpl    (%edi), %eax
  54     leal    8(%edi), %edi
  55     loopne  L0
  56     jne     L1
  57     cmpl    -4(%edi), %edx
  58     jecxz   L1
  59     jne     L0
  60 L1:
  61     leal    -8(%edi), %eax
  62     cmovne  %ecx, %eax
  63     pop     %edi
  64     ret