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zephyr
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lib
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libc
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minimal
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math_.h

math_.h 1.5 KB
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  1. /*
    2. 

  2.  * Copyright (c) 2019 Linaro Limited.
    3. 

  3.  *
    4. 

  4.  * SPDX-License-Identifier: Apache-2.0
    5. 

  5.  */
    6. 

  6. 

  7. #ifndef ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_
    8. 

  8. #define ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_
    9. 

  9. 

  10. #ifdef __cplusplus
    11. 

  11. extern "C" {
    12. 

  12. #endif
    13. 

  13. 

  14. #if !defined(FLT_EVAL_METHOD) && defined(__FLT_EVAL_METHOD__)
    15. 

  15. #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
    16. 

  16. #endif
    17. 

  17. 

  18. #if defined FLT_EVAL_METHOD
    19. 

  19. 	#if FLT_EVAL_METHOD == 0
    20. 

  20. 		typedef float  float_t;
    21. 

  21. 		typedef double double_t;
    22. 

  22. 	#elif FLT_EVAL_METHOD == 1
    23. 

  23. 		typedef double float_t;
    24. 

  24. 		typedef double double_t;
    25. 

  25. 	#elif FLT_EVAL_METHOD == 2
    26. 

  26. 		typedef long double float_t;
    27. 

  27. 		typedef long double double_t;
    28. 

  28. 	#else
    29. 

  29. 		/* Implementation-defined.  Assume float_t and double_t have
    30. 

  30. 		 * already been defined */
    31. 

  31. 	#endif
    32. 

  32. #else
    33. 

  33. 	typedef float  float_t;
    34. 

  34. 	typedef double double_t;
    35. 

  35. #endif
    36. 

  36. 

  37. /* Useful constants.  */
    38. 

  38. #define MAXFLOAT    3.40282347e+38F
    39. 

  39. 

  40. #define M_E         2.7182818284590452354
    41. 

  41. #define M_LOG2E     1.4426950408889634074
    42. 

  42. #define M_LOG10E    0.43429448190325182765
    43. 

  43. #define M_LN2       0.693147180559945309417
    44. 

  44. #define M_LN10      2.30258509299404568402
    45. 

  45. #define M_PI        3.14159265358979323846
    46. 

  46. #define M_PI_2      1.57079632679489661923
    47. 

  47. #define M_PI_4      0.78539816339744830962
    48. 

  48. #define M_1_PI      0.31830988618379067154
    49. 

  49. #define M_2_PI      0.63661977236758134308
    50. 

  50. #define M_2_SQRTPI  1.12837916709551257390
    51. 

  51. #define M_SQRT2     1.41421356237309504880
    52. 

  52. #define M_SQRT1_2   0.70710678118654752440
    53. 

  53. 

  54. #ifdef __cplusplus
    55. 

  55. }
    56. 

  56. #endif
    57. 

  57. 

  58. #endif /* ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_MATH_H_ */
    59.