EdkCompatibilityPkg/Foundation/Library/EfiCommonLib/Ia32/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.c
  15 ;
  16 ;Abstract:
  17 ;
  18   ;This is the code that uses rep stosd SetMem service
  19 ;
  20 ;--*/
  21 ;
  22 ;---------------------------------------------------------------------------
  23     .686
  24     .model  flat,C
  25     .code
  26
  27 ;---------------------------------------------------------------------------
  28 ;#include "Tiano.h"
  29 ;
  30 ;VOID
  31 ;EfiCommonLibSetMem (
  32   ;IN VOID   *Buffer,
  33   ;IN UINTN  Count,
  34   ;IN UINT8  Value
  35   ;)
  36 ;/*++
  37 ;
  38 ;Input:  VOID   *Buffer - Pointer to buffer to write
  39         ;UINTN  Count   - Number of bytes to write
  40         ;UINT8  Value   - Value to write
  41 ;
  42 ;Output: None.
  43 ;
  44 ;Saves:
  45 ;
  46 ;Modifies:
  47 ;
  48 ;Description:  This function uses rep stosd to set memory.
  49 ;
  50 ;--*/
  51 EfiCommonLibSetMem PROC
  52     push        ebp
  53     mov         ebp,esp
  54     push        edi
  55     mov         ecx,dword ptr [ebp+0Ch]
  56     test        ecx, ecx
  57     je          Exit
  58     mov         al,byte ptr [ebp+10h]
  59     mov         ah,  al
  60     shrd        edx, eax, 16
  61     shld        eax, edx, 16
  62     mov         edx, ecx
  63     mov         edi,dword ptr [ebp+8]
  64     shr         ecx, 2
  65     rep stosd
  66     mov         ecx, edx
  67     and         ecx, 3
  68     rep stosb
  69 Exit:
  70     pop         edi
  71     pop         ebp
  72     ret
  73
  74 EfiCommonLibSetMem ENDP
  75         END