MdePkg/Library/BaseMemoryLibMmx/Ia32/SetMem16.asm

   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 InternalMemSetMem16 PROC    USES    edi
  38     mov     edx, [esp + 12]
  39     mov     edi, [esp + 8]
  40     mov     ecx, edx
  41     and     edx, 3
  42     shr     ecx, 2
  43     mov     eax, [esp + 16]
  44     jz      @SetWords
  45     movd    mm0, eax
  46     pshufw  mm0, mm0, 0
  47 @@:
  48     movntq  [edi], mm0
  49     add     edi, 8
  50     loop    @B
  51     mfence
  52 @SetWords:
  53     mov     ecx, edx
  54     rep     stosw
  55     mov     eax, [esp + 8]
  56     ret
  57 InternalMemSetMem16 ENDP
  58
  59     END