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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/GetPowerOfTwo64.c
4 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 #include "BaseLibInternals.h"
21 Returns the value of the highest bit set in a 64-bit value. Equivalent to
24 This function computes the value of the highest bit set in the 64-bit value
25 specified by Operand. If Operand is zero, then zero is returned.
27 @param Operand The 64-bit operand to evaluate.
29 @return 1 << HighBitSet64(Operand)
30 @retval 0 Operand is zero.
43 return LShiftU64 (1, (UINTN
) HighBitSet64 (Operand
));