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| ;------------------------------------------------------------------------------
| ;
| ; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
| ; SPDX-License-Identifier: BSD-2-Clause-Patent
| ;
| ; Module Name:
| ;
| ; ZeroMem.nasm
| ;
| ; Abstract:
| ;
| ; ZeroMem function
| ;
| ; Notes:
| ;
| ;------------------------------------------------------------------------------
|
| DEFAULT REL
| SECTION .text
|
| ;------------------------------------------------------------------------------
| ; VOID *
| ; InternalMemZeroMem (
| ; IN VOID *Buffer,
| ; IN UINTN Count
| ; )
| ;------------------------------------------------------------------------------
| global ASM_PFX(InternalMemZeroMem)
| ASM_PFX(InternalMemZeroMem):
| push rdi
| mov rdi, rcx
| xor rcx, rcx
| xor eax, eax
| sub rcx, rdi
| and rcx, 63
| mov r8, rdi
| jz .0
| cmp rcx, rdx
| cmova rcx, rdx
| sub rdx, rcx
| rep stosb
| .0:
| mov rcx, rdx
| and edx, 63
| shr rcx, 6
| jz @ZeroBytes
| pxor xmm0, xmm0
| .1:
| movntdq [rdi], xmm0
| movntdq [rdi + 16], xmm0
| movntdq [rdi + 32], xmm0
| movntdq [rdi + 48], xmm0
| add rdi, 64
| loop .1
| mfence
| @ZeroBytes:
| mov ecx, edx
| rep stosb
| mov rax, r8
| pop rdi
| ret
|
|
|
