MdePkg/Library/BaseMemoryLibOptPei/Ia32/SetMem.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006 - 2008, 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.S
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24 ASM_GLOBAL ASM_PFX(InternalMemSetMem)
  25
  26 #------------------------------------------------------------------------------
  27 #  VOID *
  28 #  InternalMemSetMem (
  29 #    IN VOID   *Buffer,
  30 #    IN UINTN  Count,
  31 #    IN UINT8  Value
  32 #    )
  33 #------------------------------------------------------------------------------
  34 ASM_PFX(InternalMemSetMem):
  35     push    %edi
  36     movl    12(%esp),%ecx
  37     movb    16(%esp),%al
  38     movb    %al, %ah
  39     shrd    $16, %eax, %edx
  40     shld    $16, %edx, %eax
  41     movl    %ecx, %edx
  42     movl    8(%esp),%edi
  43     shr    $2, %ecx
  44     rep stosl
  45     movl    %edx, %ecx
  46     andl    $3, %ecx
  47     rep stosb
  48     movl    8(%esp),%eax
  49     pop     %edi
  50     ret