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;------------------------------------------------------------------------------ 36global ASM_PFX(InternalMemSetMem) 37ASM_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