MdePkg/Library/BaseMemoryLibOptPei/Ia32/SetMem.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 #   SetMem.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24     .386:
  25     .code:
  26
  27 .globl _InternalMemSetMem
  28
  29 #------------------------------------------------------------------------------
  30 #  VOID *
  31 #  InternalMemSetMem (
  32 #    IN VOID   *Buffer,
  33 #    IN UINTN  Count,
  34 #    IN UINT8  Value
  35 #    )
  36 #------------------------------------------------------------------------------
  37 _InternalMemSetMem:
  38     push    %edi
  39     movl    12(%esp),%ecx
  40     movl    16(%esp),%al
  41     movb    %ah, %al
  42     shrd    %edx, %eax, $16
  43     shld    %eax, %edx, $16
  44     movl    %edx, %ecx
  45     movl    8(%esp),%edi
  46     shr     $2, %ecx
  47     rep
  48     stosd
  49     movl    %ecx, %edx
  50     andl    $3, %ecx
  51     rep
  52     stosb
  53     movl    8(%esp),%eax
  54     pop     %edi
  55     ret