MdePkg/Library/BaseMemoryLibMmx/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 InternalMemSetMem64 PROC    USES    rdi
  27     DB      49h, 0fh, 6eh, 0c0h;  movq    mm0, r8       ; mm0 <- Value
  28     mov     rax, rcx                                    ; rax <- Buffer
  29     xchg    rcx, rdx                                    ; rcx <- Count
  30     mov     rdi, rax
  31 @@:
  32     DB      48h, 0fh, 0e7h, 07h;  movntq  [rdi], mm0
  33     add     rdi, 8
  34     loop    @B
  35     mfence
  36     ret
  37 InternalMemSetMem64 ENDP
  38
  39     END