878ddf1fc3
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
67 lines
1.6 KiB
NASM
67 lines
1.6 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006, Intel Corporation
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; All rights reserved. This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; ZeroMem.asm
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;
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; Abstract:
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;
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; ZeroMem function
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;
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; Notes:
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;
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;------------------------------------------------------------------------------
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.686
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.model flat,C
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.xmm
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.code
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;------------------------------------------------------------------------------
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; VOID *
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; _mem_ZeroMem (
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; IN VOID *Buffer,
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; IN UINTN Count
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; )
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;------------------------------------------------------------------------------
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InternalMemZeroMem PROC USES edi
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mov edi, [esp + 8]
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mov edx, [esp + 12]
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xor ecx, ecx
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sub ecx, edi
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xor eax, eax
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and ecx, 15
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jz @F
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cmp ecx, edx
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cmova ecx, edx
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sub edx, ecx
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rep stosb
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@@:
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mov ecx, edx
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and edx, 15
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shr ecx, 4
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jz @ZeroBytes
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pxor xmm0, xmm0
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@@:
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movntdq [edi], xmm0
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add edi, 16
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loop @B
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mfence
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@ZeroBytes:
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mov ecx, edx
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rep stosb
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mov eax, [esp + 8]
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ret
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InternalMemZeroMem ENDP
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END
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