MdePkg/Library/BaseMemoryLibSse2/ia32/SetMem64.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 ;   SetMem64.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem64 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .686
  25     .model  flat,C
  26     .xmm
  27     .code
  28
  29 ;------------------------------------------------------------------------------
  30 ;  VOID *
  31 ;  _mem_SetMem64 (
  32 ;    IN VOID   *Buffer,
  33 ;    IN UINTN  Count,
  34 ;    IN UINT64 Value
  35 ;    )
  36 ;------------------------------------------------------------------------------
  37 InternalMemSetMem64 PROC    USES    edi
  38     mov     ecx, [esp + 12]
  39     mov     edi, [esp + 8]
  40     test    edi, 8
  41     DB      0f2h, 0fh, 12h, 44h, 24h, 16    ; movddup xmm0, [esp + 16]
  42     jz      @F
  43     movq    [edi], xmm0
  44     add     edi, 8
  45     dec     ecx
  46 @@:
  47     mov     edx, ecx
  48     shr     ecx, 1
  49     jz      @SetQwords
  50 @@:
  51     movntdq [edi], xmm0
  52     add     edi, 16
  53     loop    @B
  54     mfence
  55 @SetQwords:
  56     test    dl, 1
  57     jz      @F
  58     movq    [edi], xmm0
  59 @@:
  60     ret
  61 InternalMemSetMem64 ENDP
  62
  63     END