EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/X64/EfiSetMemRep8.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 ;   EfiSetMemRep8.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 rbx
  35     cmp     rdx, 0                      ; if Size == 0, do nothing
  36     je      @SetDone
  37     mov     rax, r8
  38     mov     bl,  al
  39     mov     bh,  bl
  40     mov     ax,  bx
  41     shl     rax, 10h
  42     mov     ax,  bx
  43     mov     ebx, eax
  44     shl     rax, 20h
  45     mov     eax, ebx
  46     mov     rdi, rcx
  47     mov     rcx, rdx
  48     shr     rcx, 3
  49     rep     stosq
  50     mov     rcx, rdx
  51     and     rcx, 7
  52     rep     stosb
  53 @SetDone:
  54     ret
  55 EfiCommonLibSetMem   ENDP
  56
  57     END
  58