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author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-04-21 22:04:35 +0000 |
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committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-04-21 22:04:35 +0000 |
commit | d39eb83cc5ce2147264e2ea3566c4dbf7eb9888d (patch) | |
tree | b606874083dc56330d7b1650599d620f39f0b1df /ArmPkg/Library/BaseMemoryLibStm/CopyMemWrapper.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/BaseMemoryLibStm/CopyMemWrapper.c')
-rwxr-xr-x | ArmPkg/Library/BaseMemoryLibStm/CopyMemWrapper.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/ArmPkg/Library/BaseMemoryLibStm/CopyMemWrapper.c b/ArmPkg/Library/BaseMemoryLibStm/CopyMemWrapper.c new file mode 100755 index 0000000000..5077820be0 --- /dev/null +++ b/ArmPkg/Library/BaseMemoryLibStm/CopyMemWrapper.c @@ -0,0 +1,63 @@ +/** @file
+ CopyMem() 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"
+
+/**
+ Copies a source buffer to a destination buffer, and returns the destination buffer.
+
+ This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns
+ DestinationBuffer. The implementation must be reentrant, and it must handle the case
+ where SourceBuffer overlaps DestinationBuffer.
+
+ 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 of the memory copy.
+ @param SourceBuffer Pointer to the source buffer of the memory copy.
+ @param Length Number of bytes to copy from SourceBuffer to DestinationBuffer.
+
+ @return DestinationBuffer.
+
+**/
+VOID *
+EFIAPI
+CopyMem (
+ OUT VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ if (Length == 0) {
+ return DestinationBuffer;
+ }
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
+
+ if (DestinationBuffer == SourceBuffer) {
+ return DestinationBuffer;
+ }
+ return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);
+}
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