1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef __CUTILS_BITOPS_H 18 #define __CUTILS_BITOPS_H 19 20 #include <sys/cdefs.h> 21 22 __BEGIN_DECLS 23 24 static inline int popcount(unsigned int x) 25 { 26 return __builtin_popcount(x); 27 } 28 29 static inline int popcountl(unsigned long x) 30 { 31 return __builtin_popcountl(x); 32 } 33 34 static inline int popcountll(unsigned long long x) 35 { 36 return __builtin_popcountll(x); 37 } 38 39 __END_DECLS 40 41 #endif /* __CUTILS_BITOPS_H */ 42
