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 .686 25 .model flat,C 26 .mmx 27 .code 28 29 ;------------------------------------------------------------------------------ 30 ; VOID * 31 ; InternalMemZeroMem ( 32 ; IN VOID *Buffer, 33 ; IN UINTN Count 34 ; ); 35 ;------------------------------------------------------------------------------ 36 InternalMemZeroMem PROC USES edi 37 mov edi, [esp + 8] 38 mov ecx, [esp + 12] 39 mov edx, ecx 40 shr ecx, 3 41 jz @ZeroBytes 42 pxor mm0, mm0 43 @@: 44 movq [edi], mm0 45 add edi, 8 46 loop @B 47 @ZeroBytes: 48 and edx, 7 49 xor eax, eax 50 mov ecx, edx 51 rep stosb 52 mov eax, [esp + 8] 53 ret 54 InternalMemZeroMem ENDP 55 56 END 57
