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| ;------------------------------------------------------------------------------
| ;
| ; 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
|
|
|
