a0bdf7588a
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5981 6f19259b-4bc3-4df7-8a09-765794883524
55 lines
1.6 KiB
NASM
55 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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; CompareMem.Asm
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;
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; Abstract:
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;
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; CompareMem function
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;
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; Notes:
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;
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; The following BaseMemoryLib instances contain the same copy of this file:
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;
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; BaseMemoryLibRepStr
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; BaseMemoryLibMmx
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; BaseMemoryLibSse2
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; BaseMemoryLibOptDxe
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; BaseMemoryLibOptPei
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;
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;------------------------------------------------------------------------------
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.code
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;------------------------------------------------------------------------------
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; INTN
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; EFIAPI
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; InternalMemCompareMem (
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; IN CONST VOID *DestinationBuffer,
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; IN CONST VOID *SourceBuffer,
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; IN UINTN Length
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; );
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;------------------------------------------------------------------------------
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InternalMemCompareMem PROC USES rsi rdi
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mov rsi, rcx
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mov rdi, rdx
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mov rcx, r8
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repe cmpsb
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movzx rax, byte ptr [rsi - 1]
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movzx rdx, byte ptr [rdi - 1]
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sub rax, rdx
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ret
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InternalMemCompareMem ENDP
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END
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