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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/LowBitSet32.c
4 Copyright (c) 2006 - 2008, 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 bit position of the lowest bit set in a 32-bit value.
23 This function computes the bit position of the lowest bit set in the 32-bit
24 value specified by Operand. If Operand is zero, then -1 is returned.
25 Otherwise, a value between 0 and 31 is returned.
27 @param Operand The 32-bit operand to evaluate.
29 @retval 0..31 The lowest bit set in Operand was found.
30 @retval -1 Operand is zero.
45 for (BitIndex
= 0; 0 == (Operand
& 1); BitIndex
++, Operand
>>= 1);