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 EfiZeroMemRep4.c 15 16 Abstract: 17 18 This is the code that uses rep stosd ZeroMem service 19 20 --*/ 21 22 #include "Tiano.h" 23 24 VOID 25 EfiCommonLibZeroMem ( 26 IN VOID *Buffer, 27 IN UINTN Count 28 ) 29 /*++ 30 31 Input: VOID *Buffer - Pointer to buffer to clear 32 UINTN Count - Number of bytes to clear 33 34 Output: None. 35 36 Saves: 37 38 Modifies: 39 40 Description: This function uses rep stosd to zero memory. 41 42 --*/ 43 { 44 __asm { 45 mov ecx, Count 46 test ecx, ecx 47 je Exit 48 xor eax, eax 49 mov edi, Buffer 50 mov edx, ecx 51 shr ecx, 2 52 and edx, 3 53 rep stosd 54 mov ecx, edx 55 rep stosb 56 Exit: 57 } 58 } 59 60
