MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.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 #   SetMem16.asm
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem16 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24     .686:
  25     #.MODEL flat,C
  26     .xmm:
  27     .code:
  28
  29 #------------------------------------------------------------------------------
  30 #  VOID *
  31 #  _mem_SetMem16 (
  32 #    IN VOID   *Buffer,
  33 #    IN UINTN  Count,
  34 #    IN UINT16 Value
  35 #    )
  36 #------------------------------------------------------------------------------
  37 .global _InternalMemSetMem16
  38 _InternalMemSetMem16:
  39     push    %edi
  40     movl    12(%esp), %edx
  41     movl    8(%esp), %edi
  42     movl    %edx, %ecx
  43     andl    $3, %edx
  44     shrl    $2, %ecx
  45     movl    16(%esp), %eax
  46     jz      @SetWords
  47     movd    %eax, %mm0
  48     pshufw  $0, %mm0, %mm0
  49 L0:
  50     movntq  %mm0, (%edi)
  51     addl    $8, %edi
  52     loop    L0
  53     mfence
  54 @SetWords:
  55     movl    %edx, %ecx
  56     rep
  57     stosw
  58     movl    8(%esp), %eax
  59     pop     %edi
  60     ret