diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/SwapBytes32.c')
-rw-r--r-- | MdePkg/Library/BaseLib/SwapBytes32.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/SwapBytes32.c b/MdePkg/Library/BaseLib/SwapBytes32.c new file mode 100644 index 0000000000..1b1fe78fc2 --- /dev/null +++ b/MdePkg/Library/BaseLib/SwapBytes32.c @@ -0,0 +1,47 @@ +/** @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 common header file for this module.
+//
+#include "CommonHeader.h"
+
+#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
+ )
+{
+ UINT32 LowerBytes;
+ UINT32 HigherBytes;
+
+ LowerBytes = (UINT32) SwapBytes16 ((UINT16) Operand);
+ HigherBytes = (UINT32) SwapBytes16 ((UINT16) (Operand >> 16));
+
+ return (LowerBytes << 16 | HigherBytes);
+}
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