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 .global _InternalMemSetMem16
  25
  26 #------------------------------------------------------------------------------
  27 #  VOID *
  28 #  InternalMemSetMem16 (
  29 #    IN VOID   *Buffer,
  30 #    IN UINTN  Count,
  31 #    IN UINT16 Value
  32 #    )
  33 #------------------------------------------------------------------------------
  34 _InternalMemSetMem16:
  35     push    %edi
  36     movl    16(%esp), %eax
  37     shrdl   $16, %eax, %edx
  38     shldl   $16, %edx, %eax
  39     movl    12(%esp), %edx
  40     movl    8(%esp), %edi
  41     movl    %edx, %ecx
  42     andl    $3, %edx
  43     shrl    $2, %ecx
  44     jz      L1
  45     movd    %eax, %mm0
  46     movd    %eax, %mm1
  47     psllq   $32, %mm0
  48     por     %mm1, %mm0
  49 L0:
  50     movq    %mm0, (%edi)
  51     addl    $8, %edi
  52     loopl   L0
  53 L1:
  54     movl    %edx, %ecx
  55     rep
  56     stosw
  57     movl    8(%esp), %eax
  58     pop     %edi
  59     ret