1 /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. 2 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 ==============================================================================*/ 15 16 #ifndef TENSORFLOW_PLATFORM_SETROUND_H_ 17 #define TENSORFLOW_PLATFORM_SETROUND_H_ 18 19 #include <cfenv> 20 21 #include "tensorflow/core/platform/macros.h" 22 23 namespace tensorflow { 24 namespace port { 25 26 // While this class is active, floating point rounding mode is set to the given 27 // mode. The mode can be one of the modes defined in <cfenv>, i.e. FE_DOWNWARD, 28 // FE_TONEAREST, FE_TOWARDZERO, or FE_UPWARD. The destructor restores the 29 // original rounding mode if it could be determined. If the original rounding 30 // mode could not be determined, the destructor sets it to FE_TONEAREST. 31 class ScopedSetRound { 32 public: 33 ScopedSetRound(int mode); 34 ~ScopedSetRound(); 35 36 private: 37 int original_mode_; 38 39 TF_DISALLOW_COPY_AND_ASSIGN(ScopedSetRound); 40 }; 41 42 } // namespace port 43 } // namespace tensorflow 44 45 #endif // TENSORFLOW_PLATFORM_SETROUND_H_ 46
