MdePkg/Library/BaseMemoryLibRepStr/Ia32/ZeroMem.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 #   ZeroMem.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   ZeroMem function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 .global _InternalMemZeroMem
  25
  26 #------------------------------------------------------------------------------
  27 #  VOID *
  28 #  InternalMemZeroMem (
  29 #    IN VOID   *Buffer,
  30 #    IN UINTN  Count
  31 #    );
  32 #------------------------------------------------------------------------------
  33 _InternalMemZeroMem:
  34     push    %edi
  35     xorl    %eax,%eax
  36     movl    8(%esp),%edi
  37     movl    12(%esp),%ecx
  38     movl    %ecx,%edx
  39     shrl    $2,%ecx
  40     andl    $3,%edx
  41     pushl   %edi
  42     rep
  43     stosl
  44     movl    %edx,%ecx
  45     rep
  46     stosb
  47     popl    %eax
  48     pop     %edi
  49     ret