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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:
| ;
| ;------------------------------------------------------------------------------
|
| SECTION .text
|
| ;------------------------------------------------------------------------------
| ; VOID *
| ; EFIAPI
| ; InternalMemZeroMem (
| ; IN VOID *Buffer,
| ; IN UINTN Count
| ; );
| ;------------------------------------------------------------------------------
| global ASM_PFX(InternalMemZeroMem)
| ASM_PFX(InternalMemZeroMem):
| push edi
| mov edi, [esp + 8]
| mov edx, [esp + 12]
| xor ecx, ecx
| sub ecx, edi
| xor eax, eax
| and ecx, 63
| jz .0
| cmp ecx, edx
| cmova ecx, edx
| sub edx, ecx
| rep stosb
| .0:
| mov ecx, edx
| and edx, 63
| shr ecx, 6
| jz @ZeroBytes
| pxor xmm0, xmm0
| .1:
| movntdq [edi], xmm0
| movntdq [edi + 16], xmm0
| movntdq [edi + 32], xmm0
| movntdq [edi + 48], xmm0
| add edi, 64
| loop .1
| mfence
| @ZeroBytes:
| mov ecx, edx
| rep stosb
| mov eax, [esp + 8]
| pop edi
| ret
|
|
|
