MdePkg/Library/BaseMemoryLibRepStr/x64/ZeroMem.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 ;   ZeroMem.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   ZeroMem function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .code
  25
  26 InternalMemZeroMem  PROC    USES    rdi
  27     push    rcx
  28     xor     rax, rax
  29     mov     rdi, rcx
  30     mov     rcx, rdx
  31     shr     rcx, 3
  32     and     rdx, 7
  33     rep     stosq
  34     mov     ecx, edx
  35     rep     stosb
  36     pop     rax
  37     ret
  38 InternalMemZeroMem  ENDP
  39
  40     END