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.nasm 15 ; 16 ; Abstract: 17 ; 18 ; SetMem function 19 ; 20 ; Notes: 21 ; 22 ;------------------------------------------------------------------------------ 23 24 DEFAULT REL 25 SECTION .text 26 27 ;------------------------------------------------------------------------------ 28 ; VOID * 29 ; EFIAPI 30 ; InternalMemSetMem ( 31 ; OUT VOID *Buffer, 32 ; IN UINTN Length, 33 ; IN UINT8 Value 34 ; ); 35 ;------------------------------------------------------------------------------ 36 global ASM_PFX(InternalMemSetMem) 37 ASM_PFX(InternalMemSetMem): 38 push rdi 39 mov rax, r8 40 mov ah, al 41 DB 0x48, 0xf, 0x6e, 0xc0 ; movd mm0, rax 42 mov r8, rcx 43 mov rdi, r8 ; rdi <- Buffer 44 mov rcx, rdx 45 and edx, 7 46 shr rcx, 3 47 jz @SetBytes 48 DB 0xf, 0x70, 0xC0, 0x0 ; pshufw mm0, mm0, 0h 49 .0: 50 DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0 51 add rdi, 8 52 loop .0 53 mfence 54 @SetBytes: 55 mov ecx, edx 56 rep stosb 57 mov rax, r8 58 pop rdi 59 ret 60 61
