| /* Copyright 2019 The TensorFlow Authors. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==============================================================================*/ |
| |
| #include "signal/src/msb.h" |
| |
| namespace tflite { |
| namespace tflm_signal { |
| // TODO(b/286250473): remove namespace once de-duped libraries above |
| |
| uint32_t MostSignificantBit64(uint64_t x) { |
| #if defined(__GNUC__) |
| if (x) { |
| return 64 - __builtin_clzll(x); |
| } |
| return 64; |
| #else |
| uint32_t temp = 0; |
| while (x) { |
| x = x >> 1; |
| ++temp; |
| } |
| return temp; |
| #endif |
| } |
| |
| } // namespace tflm_signal |
| } // namespace tflite |