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| author | bxing <bxing@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-05-16 03:26:32 +0000 |
|---|---|---|
| committer | bxing <bxing@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-05-16 03:26:32 +0000 |
| commit | 24de7645e857287d096b058f7a64fb7f618c0194 (patch) | |
| tree | 85f7b9e88f09b201ac443309665b678f45154b7a /MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c | |
| parent | 608fd3fd6159e8bcbf6f55926fc805e175d168eb (diff) | |
| download | edk2-platforms-24de7645e857287d096b058f7a64fb7f618c0194.tar.xz | |
Split wrapper functions into separate source files to reduce image code size
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@168 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c b/MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c new file mode 100644 index 0000000000..c8199d8dc3 --- /dev/null +++ b/MdePkg/Library/BaseMemoryLibMmx/CompareMemWrapper.c @@ -0,0 +1,67 @@ +/** @file
+ CompareMem() implementation.
+
+ Copyright (c) 2006, Intel Corporation<BR>
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Module Name: CompareMemWrapper.c
+
+ The following BaseMemoryLib instances share the same version of this file:
+
+ BaseMemoryLib
+ BaseMemoryLibMmx
+ BaseMemoryLibSse2
+ BaseMemoryLibRepStr
+ PeiMemoryLib
+ UefiMemoryLib
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+ Compares two memory buffers of a given length.
+
+ This function compares Length bytes of SourceBuffer to Length bytes of
+ DestinationBuffer. If all Length bytes of the two buffers are identical, then
+ 0 is returned. Otherwise, the value returned is the first mismatched byte in
+ SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.
+
+ If DestinationBuffer is NULL and Length > 0, then ASSERT().
+ If SourceBuffer is NULL and Length > 0, then ASSERT().
+ If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
+ ASSERT().
+ If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
+
+ @param DestinationBuffer First memory buffer
+ @param SourceBuffer Second memory buffer
+ @param Length Length of DestinationBuffer and SourceBuffer memory
+ regions to compare
+
+ @retval 0 if DestinationBuffer == SourceBuffer
+ @retval Non-zero if DestinationBuffer != SourceBuffer
+
+**/
+INTN
+EFIAPI
+CompareMem (
+ IN CONST VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ ASSERT (DestinationBuffer != NULL);
+ ASSERT (SourceBuffer != NULL);
+ ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);
+ ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);
+ if (Length == 0) {
+ return 0;
+ }
+ return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);
+}
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