1 /* 2 * Copyright (C) 2007 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 ANDROID_SURFACE_FLINGER_CLZ_H 18 19 #include <stdint.h> 20 21 namespace android { 22 23 int inline clz(int32_t x) { 24 return __builtin_clz(x); 25 } 26 27 template <typename T> 28 static inline T min(T a, T b) { 29 return a<b ? a : b; 30 } 31 template <typename T> 32 static inline T min(T a, T b, T c) { 33 return min(a, min(b, c)); 34 } 35 template <typename T> 36 static inline T min(T a, T b, T c, T d) { 37 return min(a, b, min(c, d)); 38 } 39 40 template <typename T> 41 static inline T max(T a, T b) { 42 return a>b ? a : b; 43 } 44 template <typename T> 45 static inline T max(T a, T b, T c) { 46 return max(a, max(b, c)); 47 } 48 template <typename T> 49 static inline T max(T a, T b, T c, T d) { 50 return max(a, b, max(c, d)); 51 } 52 53 template <typename T> 54 static inline 55 void swap(T& a, T& b) { 56 T t(a); 57 a = b; 58 b = t; 59 } 60 61 62 }; // namespace android 63 64 #endif /* ANDROID_SURFACE_FLINGER_CLZ_H */ 65
