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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/LowBitSet64.c
4 Copyright (c) 2006 - 2008, 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.
18 #include "BaseLibInternals.h"
21 Returns the bit position of the lowest bit set in a 64-bit value.
23 This function computes the bit position of the lowest bit set in the 64-bit
24 value specified by Operand. If Operand is zero, then -1 is returned.
25 Otherwise, a value between 0 and 63 is returned.
27 @param Operand The 64-bit operand to evaluate.
29 @retval 0..63 The lowest bit set in Operand was found.
30 @retval -1 Operand is zero.
48 BitIndex
++, Operand
= RShiftU64 (Operand
, 1));