diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseLib/RRotU32.c | 36 |
1 files changed, 36 insertions, 0 deletions
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)); +} |