EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/X64/EfiSetMemRep4.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
   4 ; 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 ;   EfiSetMemRep4.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ; VOID
  28 ; EfiCommonLibSetMem (
  29 ;   OUT     VOID                      *Buffer,
  30 ;   IN      UINTN                     Size,
  31 ;   IN      UINT8                     Value
  32 ;   );
  33 ;------------------------------------------------------------------------------
  34 EfiCommonLibSetMem   PROC    USES    rdi
  35     cmp     rdx, 0                      ; if Size == 0, do nothing
  36     je      @SetDone
  37     mov     rdi, rcx
  38     mov     al,  r8b
  39     mov     ah,  al
  40     shrd    ecx, eax, 16
  41     shld    eax, ecx, 16
  42     mov     rcx, rdx
  43     shr     rcx, 2
  44     rep     stosd
  45     mov     rcx, rdx
  46     and     rcx, 3
  47     rep     stosb
  48 @SetDone:
  49     ret
  50 EfiCommonLibSetMem   ENDP
  51
  52     END
  53