From d39eb83cc5ce2147264e2ea3566c4dbf7eb9888d Mon Sep 17 00:00:00 2001
From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 21 Apr 2010 22:04:35 +0000
Subject: 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
---
 ArmPkg/Library/BaseMemoryLibVstm/CopyMemWrapper.c | 63 +++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100755 ArmPkg/Library/BaseMemoryLibVstm/CopyMemWrapper.c

(limited to 'ArmPkg/Library/BaseMemoryLibVstm/CopyMemWrapper.c')

diff --git a/ArmPkg/Library/BaseMemoryLibVstm/CopyMemWrapper.c b/ArmPkg/Library/BaseMemoryLibVstm/CopyMemWrapper.c
new file mode 100755
index 0000000000..5077820be0
--- /dev/null
+++ b/ArmPkg/Library/BaseMemoryLibVstm/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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