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 ; SetMem.asm 15 ; 16 ; Abstract: 17 ; 18 ; SetMem function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 .code 25 26 ;------------------------------------------------------------------------------ 27 ; VOID * 28 ; EFIAPI 29 ; InternalMemSetMem ( 30 ; OUT VOID *Buffer, 31 ; IN UINTN Length, 32 ; IN UINT8 Value 33 ; ); 34 ;------------------------------------------------------------------------------ 35 InternalMemSetMem PROC USES rdi 36 mov rax, r8 37 mov ah, al 38 DB 48h, 0fh, 6eh, 0c0h ; movd mm0, rax 39 mov r8, rcx 40 mov rdi, r8 ; rdi <- Buffer 41 mov rcx, rdx 42 and edx, 7 43 shr rcx, 3 44 jz @SetBytes 45 DB 0fh, 70h, 0C0h, 00h ; pshufw mm0, mm0, 0h 46 @@: 47 DB 0fh, 0e7h, 07h ; movntq [rdi], mm0 48 add rdi, 8 49 loop @B 50 mfence 51 @SetBytes: 52 mov ecx, edx 53 rep stosb 54 mov rax, r8 55 ret 56 InternalMemSetMem ENDP 57 58 END 59
