]>
git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/HighBitSet32.c
4 Copyright (c) 2006, Intel Corporation<BR>
5 All rights reserved. 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.
16 // Include common header file for this module.
20 #include "BaseLibInternals.h"
23 Returns the bit position of the highest bit set in a 32-bit value. Equivalent
26 This function computes the bit position of the highest bit set in the 32-bit
27 value specified by Operand. If Operand is zero, then -1 is returned.
28 Otherwise, a value between 0 and 31 is returned.
30 @param Operand The 32-bit operand to evaluate.
32 @return Position of the highest bit set in Operand if found.
33 @retval -1 Operand is zero.
47 for (BitIndex
= 31; (INT32
)Operand
> 0; BitIndex
--, Operand
<<= 1);