1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2007, 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 ; memsetRep8.asm 15 ; 16 ; Abstract: 17 ; 18 ; SetMem function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 .code 25 26 ;------------------------------------------------------------------------------ 27 ; VOID 28 ; memset ( 29 ; OUT VOID *Buffer, 30 ; IN UINT8 Value, 31 ; IN UINTN Length 32 ; ); 33 ;------------------------------------------------------------------------------ 34 memset PROC USES rdi rbx 35 cmp r8, 0 ; if Size == 0, do nothing 36 mov r9, rcx 37 je @SetDone 38 mov rax, rdx 39 mov bl, al 40 mov bh, bl 41 mov ax, bx 42 shl rax, 10h 43 mov ax, bx 44 mov ebx, eax 45 shl rax, 20h 46 mov eax, ebx 47 mov rdi, rcx 48 mov rcx, r8 49 shr rcx, 3 50 rep stosq 51 mov rcx, rdx 52 and rcx, 7 53 rep stosb 54 @SetDone: 55 mov rax, r9 56 ret 57 memset ENDP 58 59 END 60 61
