Added to support X64 port (with SV5 ABI). May be able to remove after we port everything, but Sec, to EFI X64 ABI.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10683 6f19259b-4bc3-4df7-8a09-765794883524

UnixPkg/Library/UnixBaseLib/SwapBytes64.c

@@ -0,0 +1,39 @@
+/** @file
+  Math worker functions.
+
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+  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 "BaseLibInternals.h"
+
+/**
+  Switches the endianess of a 64-bit integer.
+
+  This function swaps the bytes in a 64-bit unsigned value to switch the value
+  from little endian to big endian or vice versa. The byte swapped value is
+  returned.
+
+  @param  Value A 64-bit unsigned value.
+
+  @return The byte swapped Value.
+
+**/
+UINT64
+EFIAPI
+SwapBytes64 (
+  IN      UINT64                    Value
+  )
+{
+  return InternalMathSwapBytes64 (Value);
+}