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| author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-04-21 22:04:35 +0000 |
|---|---|---|
| committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-04-21 22:04:35 +0000 |
| commit | d39eb83cc5ce2147264e2ea3566c4dbf7eb9888d (patch) | |
| tree | b606874083dc56330d7b1650599d620f39f0b1df /ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c | |
| parent | d02b28d736c19b9a59690008e56c63e839fcf28f (diff) | |
| download | edk2-platforms-d39eb83cc5ce2147264e2ea3566c4dbf7eb9888d.tar.xz | |
Add some ldm/vldm optimized CopyMem routines. Add performance macros to BDS
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10388 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c')
| -rwxr-xr-x | ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c b/ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c new file mode 100755 index 0000000000..278ef3369e --- /dev/null +++ b/ArmPkg/Library/BaseMemoryLibVstm/CompareMemWrapper.c @@ -0,0 +1,66 @@ +/** @file
+ CompareMem() implementation.
+
+ The following BaseMemoryLib instances contain the same copy of this file:
+ BaseMemoryLib
+ BaseMemoryLibMmx
+ BaseMemoryLibSse2
+ BaseMemoryLibRepStr
+ BaseMemoryLibOptDxe
+ BaseMemoryLibOptPei
+ PeiMemoryLib
+ UefiMemoryLib
+
+Copyright (c) 2006 - 2009, 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.
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+ Compares the contents of two buffers.
+
+ 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 Length > 0 and DestinationBuffer is NULL, then ASSERT().
+ If Length > 0 and SourceBuffer is NULL, 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 Pointer to the destination buffer to compare.
+ @param SourceBuffer Pointer to the source buffer to compare.
+ @param Length Number of bytes to compare.
+
+ @return 0 All Length bytes of the two buffers are identical.
+ @retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first
+ mismatched byte in DestinationBuffer.
+
+**/
+INTN
+EFIAPI
+CompareMem (
+ IN CONST VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ if (Length == 0 || DestinationBuffer == SourceBuffer) {
+ return 0;
+ }
+ ASSERT (DestinationBuffer != NULL);
+ ASSERT (SourceBuffer != NULL);
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
+
+ return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);
+}
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