MdePkg/Library/BaseMemoryLibRepStr/Ia32/ZeroMem.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, 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 ;   ZeroMem.Asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   ZeroMem function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     SECTION .text
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  InternalMemZeroMem (
  29 ;    IN VOID   *Buffer,
  30 ;    IN UINTN  Count
  31 ;    );
  32 ;------------------------------------------------------------------------------
  33 global ASM_PFX(InternalMemZeroMem)
  34 ASM_PFX(InternalMemZeroMem):
  35     push    edi
  36     xor     eax, eax
  37     mov     edi, [esp + 8]
  38     mov     ecx, [esp + 12]
  39     mov     edx, ecx
  40     shr     ecx, 2
  41     and     edx, 3
  42     push    edi
  43     rep     stosd
  44     mov     ecx, edx
  45     rep     stosb
  46     pop     eax
  47     pop     edi
  48     ret
  49