| ;------------------------------------------------------------------------------ | |
| ; | |
| ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> | |
| ; 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 | |