MdePkg/Library/BaseMemoryLibSse2/x64/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     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  _mem_SetMem64 (
  29 ;    IN VOID   *Buffer,
  30 ;    IN UINTN  Count,
  31 ;    IN UINT8  Value
  32 ;    )
  33 ;------------------------------------------------------------------------------
  34 InternalMemSetMem64 PROC    USES    rdi
  35     mov     rdi, rcx
  36     mov     r9, rcx
  37     test    cl, 8
  38     jz      @F
  39     mov     [rdi], r8
  40     add     rdi, 8
  41     dec     rdx
  42 @@:
  43     mov     rcx, rdx
  44     shr     rcx, 1
  45     jz      @SetQwords
  46     movd    xmm0, r8
  47     movlhps xmm0, xmm0
  48 @@:
  49     movntdq [rdi], xmm0
  50     add     rdi, 16
  51     loop    @B
  52     mfence
  53 @SetQwords:
  54     test    dl, 1
  55     jz      @F
  56     mov     [rdi], r8
  57 @@:
  58     ret
  59 InternalMemSetMem64 ENDP
  60
  61     END