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; SetMem.asm 15; 16; Abstract: 17; 18; SetMem function 19; 20; Notes: 21; 22;------------------------------------------------------------------------------ 23 24 .code 25 26;------------------------------------------------------------------------------ 27; VOID * 28; EFIAPI 29; EfiCommonLibSetMem ( 30; OUT VOID *Buffer, 31; IN UINTN Size, 32; IN UINT8 Value 33; ); 34;------------------------------------------------------------------------------ 35EfiCommonLibSetMem PROC USES rdi 36 cmp rdx, 0 ; if Size == 0, do nothing 37 je @SetDone 38 mov rax, r8 39 mov ah, al 40 DB 48h, 0fh, 6eh, 0c0h ; movd mm0, rax 41 mov r8, rcx 42 mov rdi, r8 ; rdi <- Buffer 43 mov rcx, rdx 44 and edx, 7 45 shr rcx, 3 46 jz @SetBytes 47 DB 0fh, 70h, 0C0h, 00h ; pshufw mm0, mm0, 0h 48@@: 49 DB 48h, 0fh, 7eh, 07h ; movd [rdi], mm0 50 add rdi, 8 51 loop @B 52@SetBytes: 53 mov ecx, edx 54 rep stosb 55 mov rax, r8 56@SetDone: 57 ret 58EfiCommonLibSetMem ENDP 59 60 END 61