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.nasm 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 mov edi, [esp + 8] 37 mov ecx, [esp + 12] 38 mov edx, ecx 39 shr ecx, 3 40 jz @ZeroBytes 41 pxor mm0, mm0 42 .0: 43 movq [edi], mm0 44 add edi, 8 45 loop .0 46 @ZeroBytes: 47 and edx, 7 48 xor eax, eax 49 mov ecx, edx 50 rep stosb 51 mov eax, [esp + 8] 52 pop edi 53 ret 54 55
