1 /* Copyright 2021 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 #ifndef TENSORFLOW_LITE_KERNELS_INTERNAL_CONSTANTS_H_ 16 #define TENSORFLOW_LITE_KERNELS_INTERNAL_CONSTANTS_H_ 17 18 // Maths constants. 19 // The following macros are not always available on all platforms. 20 // E.g. MSVC requires additional compile flag to export those. 21 #ifndef M_E 22 #define M_E 2.7182818284590452354 /* e */ 23 #endif 24 #ifndef M_LOG2E 25 #define M_LOG2E 1.4426950408889634074 /* log_2 e */ 26 #endif 27 #ifndef M_LOG10E 28 #define M_LOG10E 0.43429448190325182765 /* log_10 e */ 29 #endif 30 #ifndef M_LN2 31 #define M_LN2 0.69314718055994530942 /* log_e 2 */ 32 #endif 33 #ifndef M_LN10 34 #define M_LN10 2.30258509299404568402 /* log_e 10 */ 35 #endif 36 #ifndef M_PI 37 #define M_PI 3.14159265358979323846 /* pi */ 38 #endif 39 #ifndef M_PI_2 40 #define M_PI_2 1.57079632679489661923 /* pi/2 */ 41 #endif 42 #ifndef M_PI_4 43 #define M_PI_4 0.78539816339744830962 /* pi/4 */ 44 #endif 45 #ifndef M_1_PI 46 #define M_1_PI 0.31830988618379067154 /* 1/pi */ 47 #endif 48 #ifndef M_2_PI 49 #define M_2_PI 0.63661977236758134308 /* 2/pi */ 50 #endif 51 #ifndef M_2_SQRTPI 52 #define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 53 #endif 54 #ifndef M_SQRT2 55 #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 56 #endif 57 #ifndef M_SQRT1_2 58 #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 59 #endif 60 61 #endif // TENSORFLOW_LITE_KERNELS_INTERNAL_CONSTANTS_H_ 62