MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 ; 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     .mmx
  27     .code
  28
  29 ;------------------------------------------------------------------------------
  30 ;  VOID *
  31 ;  EFIAPI
  32 ;  InternalMemSetMem16 (
  33 ;    IN VOID   *Buffer,
  34 ;    IN UINTN  Count,
  35 ;    IN UINT16 Value
  36 ;    )
  37 ;------------------------------------------------------------------------------
  38 InternalMemSetMem16 PROC    USES    edi
  39     mov     eax, [esp + 16]
  40     shrd    edx, eax, 16
  41     shld    eax, edx, 16
  42     mov     edx, [esp + 12]
  43     mov     edi, [esp + 8]
  44     mov     ecx, edx
  45     and     edx, 3
  46     shr     ecx, 2
  47     jz      @SetWords
  48     movd    mm0, eax
  49     movd    mm1, eax
  50     psllq   mm0, 32
  51     por     mm0, mm1
  52 @@:
  53     movq    [edi], mm0
  54     add     edi, 8
  55     loop    @B
  56 @SetWords:
  57     mov     ecx, edx
  58     rep     stosw
  59     mov     eax, [esp + 8]
  60     ret
  61 InternalMemSetMem16 ENDP
  62
  63     END