Initial import.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseLib/RRotU32.c

@@ -0,0 +1,42 @@
+/** @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"
+
+/**
+  Rotates a 32-bit integer right between 0 and 31 bits, filling the high bits
+  with the low bits that were rotated.
+
+  This function rotates the 32-bit value Operand to the right by Count bits.
+  The high Count bits are fill with the low Count bits of Operand. The rotated
+  value is returned.
+
+  If Count is greater than 31, then ASSERT().
+
+  @param  Operand The 32-bit operand to rotate right.
+  @param  Count   The number of bits to rotate right.
+
+  @return Operand >>> Count
+
+**/
+UINT32
+EFIAPI
+RRotU32 (
+  IN      UINT32                    Operand,
+  IN      UINTN                     Count
+  )
+{
+  ASSERT (Count < sizeof (Operand) * 8);
+  return (Operand >> Count) | (Operand << (32 - Count));
+}