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 .xmm 27 .code 28 29;------------------------------------------------------------------------------ 30; VOID * 31; EFIAPI 32; InternalMemZeroMem ( 33; IN VOID *Buffer, 34; IN UINTN Count 35; ); 36;------------------------------------------------------------------------------ 37InternalMemZeroMem PROC USES edi 38 mov edi, [esp + 8] 39 mov edx, [esp + 12] 40 xor ecx, ecx 41 sub ecx, edi 42 xor eax, eax 43 and ecx, 15 44 jz @F 45 cmp ecx, edx 46 cmova ecx, edx 47 sub edx, ecx 48 rep stosb 49@@: 50 mov ecx, edx 51 and edx, 15 52 shr ecx, 4 53 jz @ZeroBytes 54 pxor xmm0, xmm0 55@@: 56 movntdq [edi], xmm0 57 add edi, 16 58 loop @B 59 mfence 60@ZeroBytes: 61 mov ecx, edx 62 rep stosb 63 mov eax, [esp + 8] 64 ret 65InternalMemZeroMem ENDP 66 67 END 68