1 files changed, 36 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/LRotU32.c b/roms/edk2/MdePkg/Library/BaseLib/LRotU32.c
new file mode 100644
index 000000000..4e671a320
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseLib/LRotU32.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 left between 0 and 31 bits, filling the low bits
+  with the high bits that were rotated.
+
+  This function rotates the 32-bit value Operand to the left by Count bits. The
+  low Count bits are fill with the high 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 left.
+  @param  Count   The number of bits to rotate left.
+
+  @return Operand << Count
+
+**/
+UINT32
+EFIAPI
+LRotU32 (
+  IN      UINT32                    Operand,
+  IN      UINTN                     Count
+  )
+{
+  ASSERT (Count < 32);
+  return (Operand << Count) | (Operand >> (32 - Count));
+}