Import some basic libraries instances for Mde Packages.

[mirror_edk2.git] / MdePkg / Library / BaseLib / SwapBytes32.c

diff --git a/MdePkg/Library/BaseLib/SwapBytes32.c b/MdePkg/Library/BaseLib/SwapBytes32.c
new file mode 100644 (file)
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+++ b/MdePkg/Library/BaseLib/SwapBytes32.c
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+/** @file\r
+  Math worker functions.\r
+\r
+  Copyright (c) 2006, Intel Corporation<BR>\r
+  All rights reserved. This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+//\r
+// Include common header file for this module.\r
+//\r
+#include "CommonHeader.h"\r
+\r
+#include "BaseLibInternals.h"\r
+\r
+/**\r
+  Switches the endianess of a 32-bit integer.\r
+\r
+  This function swaps the bytes in a 32-bit unsigned value to switch the value\r
+  from little endian to big endian or vice versa. The byte swapped value is\r
+  returned.\r
+\r
+  @param  Operand A 32-bit unsigned value.\r
+\r
+  @return The byte swaped Operand.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+SwapBytes32 (\r
+  IN      UINT32                    Operand\r
+  )\r
+{\r
+  UINT32  LowerBytes;\r
+  UINT32  HigherBytes;\r
+\r
+  LowerBytes  = (UINT32) SwapBytes16 ((UINT16) Operand);\r
+  HigherBytes = (UINT32) SwapBytes16 ((UINT16) (Operand >> 16));\r
+\r
+  return (LowerBytes << 16 | HigherBytes);\r
+}\r