;------------------------------------------------------------------------------ ; ; Copyright (c) 2006, Intel Corporation. All rights reserved.
; SPDX-License-Identifier: BSD-2-Clause-Patent ; ; Module Name: ; ; SetMem.nasm ; ; Abstract: ; ; SetMem function ; ; Notes: ; ;------------------------------------------------------------------------------ DEFAULT REL SECTION .text ;------------------------------------------------------------------------------ ; VOID * ; EFIAPI ; InternalMemSetMem ( ; OUT VOID *Buffer, ; IN UINTN Length, ; IN UINT8 Value ; ); ;------------------------------------------------------------------------------ global ASM_PFX(InternalMemSetMem) ASM_PFX(InternalMemSetMem): push rdi mov rax, r8 mov ah, al DB 0x48, 0xf, 0x6e, 0xc0 ; movd mm0, rax mov r8, rcx mov rdi, r8 ; rdi <- Buffer mov rcx, rdx and edx, 7 shr rcx, 3 jz @SetBytes DB 0xf, 0x70, 0xC0, 0x0 ; pshufw mm0, mm0, 0h .0: DB 0xf, 0xe7, 0x7 ; movntq [rdi], mm0 add rdi, 8 loop .0 mfence @SetBytes: mov ecx, edx rep stosb mov rax, r8 pop rdi ret