2 * Copyright (c) 2015 James Almer
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVUTIL_X86_INTMATH_H
22 #define AVUTIL_X86_INTMATH_H
27 /* Our generic version of av_popcount is faster than GCC's built-in on
28 * CPUs that don't support the popcnt instruction.
30 #if defined(__GNUC__) && defined(__POPCNT__)
31 #define av_popcount __builtin_popcount
33 #define av_popcount64 __builtin_popcountll
36 #endif /* defined(__GNUC__) && defined(__POPCNT__) */
38 #endif /* AVUTIL_X86_INTMATH_H */