;------------------------------------------------------------------------------ ; ; 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.asm ; ; Abstract: ; ; ZeroMem function ; ; Notes: ; ;------------------------------------------------------------------------------ .code ;------------------------------------------------------------------------------ ; VOID * ; InternalMemZeroMem ( ; IN VOID *Buffer, ; IN UINTN Count ; ) ;------------------------------------------------------------------------------ InternalMemZeroMem PROC USES rdi mov rdi, rcx xor rcx, rcx xor eax, eax sub rcx, rdi and rcx, 15 mov r8, rdi jz @F cmp rcx, rdx cmova rcx, rdx sub rdx, rcx rep stosb @@: mov rcx, rdx and edx, 15 shr rcx, 4 jz @ZeroBytes pxor xmm0, xmm0 @@: movntdq [rdi], xmm0 ; rdi should be 16-byte aligned add rdi, 16 loop @B mfence @ZeroBytes: mov ecx, edx rep stosb mov rax, r8 ret InternalMemZeroMem ENDP END