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 ;  InternalMemSetMem64 (
  32 ;    IN VOID   *Buffer,
  33 ;    IN UINTN  Count,
  34 ;    IN UINT64 Value
  35 ;    )
  36 ;------------------------------------------------------------------------------
  37 InternalMemSetMem64 PROC
  38     mov     eax, [esp + 4]
  39     mov     ecx, [esp + 8]
  40     test    al, 8
  41     mov     edx, eax
  42     movq    xmm0, [esp + 12]
  43     jz      @F
  44     movq    [edx], xmm0
  45     add     edx, 8
  46     dec     ecx
  47 @@:
  48     shr     ecx, 1
  49     jz      @SetQwords
  50     movlhps xmm0, xmm0
  51 @@:
  52     movntdq [edx], xmm0
  53     lea     edx, [edx + 16]
  54     loop    @B
  55     mfence
  56 @SetQwords:
  57     jnc     @F
  58     movq    [edx], xmm0
  59 @@:
  60     ret
  61 InternalMemSetMem64 ENDP
  62
  63     END