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-rw-r--r--src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c36
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diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c
new file mode 100644
index 00000000..4207ddb1
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c
@@ -0,0 +1,36 @@
+/** @file
+ Math worker functions.
+
+ Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#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 < 32);
+ return (Operand >> Count) | (Operand << (32 - Count));
+}