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 ; SetMem64.asm 15 ; 16 ; Abstract: 17 ; 18 ; SetMem64 function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 .code 25 26 ;------------------------------------------------------------------------------ 27 ; VOID * 28 ; InternalMemSetMem64 ( 29 ; IN VOID *Buffer, 30 ; IN UINTN Count, 31 ; IN UINT64 Value 32 ; ) 33 ;------------------------------------------------------------------------------ 34 InternalMemSetMem64 PROC 35 mov rax, rcx ; rax <- Buffer 36 xchg rcx, rdx ; rcx <- Count & rdx <- Buffer 37 test dl, 8 38 movd xmm0, r8 39 jz @F 40 mov [rdx], r8 41 add rdx, 8 42 dec rcx 43 @@: 44 shr rcx, 1 45 jz @SetQwords 46 movlhps xmm0, xmm0 47 @@: 48 movntdq [rdx], xmm0 49 lea rdx, [rdx + 16] 50 loop @B 51 mfence 52 @SetQwords: 53 jnc @F 54 mov [rdx], r8 55 @@: 56 ret 57 InternalMemSetMem64 ENDP 58 59 END 60
