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 clz_impl(int32_t x); 24 clz(int32_t x)25int inline clz(int32_t x) 26 { 27 #if defined(__arm__) && !defined(__thumb__) 28 return __builtin_clz(x); 29 #else 30 return clz_impl(x); 31 #endif 32 } 33 34 35 }; // namespace android 36 37 #endif /* ANDROID_SURFACE_FLINGER_CLZ_H */ 38