mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 18:15:45 -05:00
44 lines
2.0 KiB
C++
44 lines
2.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
|
|
// written by Christian Daniel //
|
|
// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
|
|
// Copyright (C) 2020 Jon Beniston, M7RCE <jon@beniston.com> //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_POPCOUNT_H
|
|
#define INCLUDE_POPCOUNT_H
|
|
|
|
// Population count - count number of bits
|
|
#if defined(__cplusplus) && (__cplusplus >= 202002L)
|
|
#include <bit>
|
|
#define popcount std::popcount
|
|
#elif defined (__GNUC__)
|
|
#define popcount __builtin_popcount
|
|
#elif defined(_MSC_VER)
|
|
#include <intrin.h>
|
|
#define popcount __popcnt
|
|
#else
|
|
static int popcount(int in)
|
|
{
|
|
int cnt = 0;
|
|
for(int i = 0; i < 32; i++)
|
|
cnt += (in >> i) & 1;
|
|
return cnt;
|
|
}
|
|
#endif
|
|
|
|
#endif /* INCLUDE_POPCOUNT_H */
|