mirror of https://github.com/acidanthera/audk.git
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*++
|
|
|
|
Copyright (c) 2007, Intel Corporation
|
|
All rights reserved. This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
Module Name:
|
|
|
|
EfiZeroMemRep4.c
|
|
|
|
Abstract:
|
|
|
|
This is the code that uses rep stosd ZeroMem service
|
|
|
|
--*/
|
|
|
|
#include "Tiano.h"
|
|
|
|
VOID
|
|
EfiCommonLibZeroMem (
|
|
IN VOID *Buffer,
|
|
IN UINTN Count
|
|
)
|
|
/*++
|
|
|
|
Input: VOID *Buffer - Pointer to buffer to clear
|
|
UINTN Count - Number of bytes to clear
|
|
|
|
Output: None.
|
|
|
|
Saves:
|
|
|
|
Modifies:
|
|
|
|
Description: This function uses rep stosd to zero memory.
|
|
|
|
--*/
|
|
{
|
|
__asm {
|
|
mov ecx, Count
|
|
test ecx, ecx
|
|
je Exit
|
|
xor eax, eax
|
|
mov edi, Buffer
|
|
mov edx, ecx
|
|
shr ecx, 2
|
|
and edx, 3
|
|
rep stosd
|
|
mov ecx, edx
|
|
rep stosb
|
|
Exit:
|
|
}
|
|
}
|
|
|