1fef058f4b
1. Remove .intel_syntax directives in GCC assembly files. All these assembly files have been updated to use the preferred syntax for GAS 2. Correct the incorrect comments for internal worker functions for SetMemXX() and ScanMemXX(). The Length parameter is actually the counter of 16-bit, 32-bit or 64-bit value. 3. Simplify the logic in ZeroMemoryWrapper.c for BaseMemoryLibOptPei instance to remove the conditional statement for zero length. This logic is already covered by worker function InternalMemZeroMem(). 4. Cleanup all the Wrapper C files in BaseMemoryLib instances. They are supposed to be shared by all these 8 BaseMemoryLib instances, but are out-of-sync after some maintenance. This patch re-syncs them and makes them exactly the same. 5. Cleanup MemLibInternal.h so that it is shared by 6 BaseMemoryLib instance except for PeiMemoryLib and UefiMemoryLib. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9041 6f19259b-4bc3-4df7-8a09-765794883524
67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
/** @file
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CompareMem() implementation.
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The following BaseMemoryLib instances contain the same copy of this file:
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BaseMemoryLib
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BaseMemoryLibMmx
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BaseMemoryLibSse2
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BaseMemoryLibRepStr
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BaseMemoryLibOptDxe
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BaseMemoryLibOptPei
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PeiMemoryLib
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UefiMemoryLib
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Copyright (c) 2006 - 2009, Intel Corporation<BR>
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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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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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#include "MemLibInternals.h"
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/**
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Compares the contents of two buffers.
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This function compares Length bytes of SourceBuffer to Length bytes of DestinationBuffer.
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If all Length bytes of the two buffers are identical, then 0 is returned. Otherwise, the
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value returned is the first mismatched byte in SourceBuffer subtracted from the first
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mismatched byte in DestinationBuffer.
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If Length > 0 and DestinationBuffer is NULL, then ASSERT().
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If Length > 0 and SourceBuffer is NULL, then ASSERT().
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If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().
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If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
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@param DestinationBuffer Pointer to the destination buffer to compare.
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@param SourceBuffer Pointer to the source buffer to compare.
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@param Length Number of bytes to compare.
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@return 0 All Length bytes of the two buffers are identical.
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@retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first
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mismatched byte in DestinationBuffer.
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**/
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INTN
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EFIAPI
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CompareMem (
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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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if (Length == 0 || DestinationBuffer == SourceBuffer) {
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return 0;
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}
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ASSERT (DestinationBuffer != NULL);
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ASSERT (SourceBuffer != NULL);
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ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
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ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
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return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);
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}
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