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-rw-r--r--MdePkg/Library/BaseLib/SwapBytes32.c39
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diff --git a/MdePkg/Library/BaseLib/SwapBytes32.c b/MdePkg/Library/BaseLib/SwapBytes32.c
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+++ b/MdePkg/Library/BaseLib/SwapBytes32.c
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+/** @file
+ Math worker functions.
+
+ 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.
+
+**/
+
+#include "BaseLibInternals.h"
+
+/**
+ Switches the endianess of a 32-bit integer.
+
+ This function swaps the bytes in a 32-bit unsigned value to switch the value
+ from little endian to big endian or vice versa. The byte swapped value is
+ returned.
+
+ @param Operand A 32-bit unsigned value.
+
+ @return The byte swaped Operand.
+
+**/
+UINT32
+EFIAPI
+SwapBytes32 (
+ IN UINT32 Operand
+ )
+{
+ return (UINT32)(
+ ((UINT32)SwapBytes16 ((UINT16)Operand) << 16) |
+ ((UINT32)SwapBytes16 ((UINT16)(Operand >> 16)))
+ );
+}