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      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 
     25 int 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