MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem32.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 #   SetMem32.asm
  15 #
  16 # Abstract:
  17 #
  18 #   SetMem32 function
  19 #
  20 # Notes:
  21 #
  22 #------------------------------------------------------------------------------
  23
  24     .686:
  25     #.MODEL flat,C
  26     .xmm:
  27     .code:
  28
  29 #------------------------------------------------------------------------------
  30 #  VOID *
  31 #  _mem_SetMem32 (
  32 #    IN VOID   *Buffer,
  33 #    IN UINTN  Count,
  34 #    IN UINT32 Value
  35 #    )
  36 #------------------------------------------------------------------------------
  37 .global _InternalMemSetMem32
  38 _InternalMemSetMem32:
  39     push    %edi
  40     movl    12(%esp), %edx
  41     movl    8(%esp), %edi
  42     movl    %edx, %ecx
  43     shrl    %ecx
  44     movd    16(%esp), %mm0
  45     movl    %edi, %eax
  46     jz      @SetDwords
  47     pshufw  $0x44, %mm0, %mm0
  48 L0:
  49     movntq  %mm0, (%edi)
  50     addl    $8, %edi
  51     loopl   L0
  52     mfence
  53 @SetDwords:
  54     testb   $1, %dl
  55     jz      @F
  56     movd    %mm0, (%edi)
  57 L1:
  58     pop     %edi
  59     ret