;------------------------------------------------------------------------------ ; ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> ; 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: ; ; ZeroMem.nasm ; ; Abstract: ; ; ZeroMem function ; ; Notes: ; ;------------------------------------------------------------------------------ SECTION .text ;------------------------------------------------------------------------------ ; VOID * ; EFIAPI ; InternalMemZeroMem ( ; IN VOID *Buffer, ; IN UINTN Count ; ); ;------------------------------------------------------------------------------ global ASM_PFX(InternalMemZeroMem) ASM_PFX(InternalMemZeroMem): push edi mov edi, [esp + 8] mov edx, [esp + 12] xor ecx, ecx sub ecx, edi xor eax, eax and ecx, 15 jz .0 cmp ecx, edx cmova ecx, edx sub edx, ecx rep stosb .0: mov ecx, edx and edx, 15 shr ecx, 4 jz @ZeroBytes pxor xmm0, xmm0 .1: movntdq [edi], xmm0 add edi, 16 loop .1 mfence @ZeroBytes: mov ecx, edx rep stosb mov eax, [esp + 8] pop edi ret