float.h 1.9 KB

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  1. #ifndef _FLOAT_H_
  2. #define _FLOAT_H_
  3. #define FLT_RADIX 2
  4. /* IEEE float */
  5. #define FLT_MANT_DIG 24
  6. #define FLT_DIG 6
  7. #define FLT_ROUNDS 1
  8. #define FLT_EPSILON 1.19209290e-07F
  9. #define FLT_MIN_EXP (-125)
  10. #define FLT_MIN 1.17549435e-38F
  11. #define FLT_MIN_10_EXP (-37)
  12. #define FLT_MAX_EXP 128
  13. #define FLT_MAX 3.40282347e+38F
  14. #define FLT_MAX_10_EXP 38
  15. /* IEEE double */
  16. #define DBL_MANT_DIG 53
  17. #define DBL_DIG 15
  18. #define DBL_EPSILON 2.2204460492503131e-16
  19. #define DBL_MIN_EXP (-1021)
  20. #define DBL_MIN 2.2250738585072014e-308
  21. #define DBL_MIN_10_EXP (-307)
  22. #define DBL_MAX_EXP 1024
  23. #define DBL_MAX 1.7976931348623157e+308
  24. #define DBL_MAX_10_EXP 308
  25. /* horrible intel long double */
  26. #if defined __i386__ || defined __x86_64__
  27. #define LDBL_MANT_DIG 64
  28. #define LDBL_DIG 18
  29. #define LDBL_EPSILON 1.08420217248550443401e-19L
  30. #define LDBL_MIN_EXP (-16381)
  31. #define LDBL_MIN 3.36210314311209350626e-4932L
  32. #define LDBL_MIN_10_EXP (-4931)
  33. #define LDBL_MAX_EXP 16384
  34. #define LDBL_MAX 1.18973149535723176502e+4932L
  35. #define LDBL_MAX_10_EXP 4932
  36. #define DECIMAL_DIG 21
  37. #elif defined __aarch64__ || defined __riscv
  38. /*
  39. * Use values from:
  40. * gcc -dM -E -xc /dev/null | grep LDBL | sed -e "s/__//g"
  41. */
  42. #define LDBL_MANT_DIG 113
  43. #define LDBL_DIG 33
  44. #define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
  45. #define LDBL_MIN_EXP (-16381)
  46. #define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
  47. #define LDBL_MIN_10_EXP (-4931)
  48. #define LDBL_MAX_EXP 16384
  49. #define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
  50. #define LDBL_MAX_10_EXP 4932
  51. #define DECIMAL_DIG 36
  52. #else
  53. /* same as IEEE double */
  54. #define LDBL_MANT_DIG 53
  55. #define LDBL_DIG 15
  56. #define LDBL_EPSILON 2.2204460492503131e-16L
  57. #define LDBL_MIN_EXP (-1021)
  58. #define LDBL_MIN 2.2250738585072014e-308L
  59. #define LDBL_MIN_10_EXP (-307)
  60. #define LDBL_MAX_EXP 1024
  61. #define LDBL_MAX 1.7976931348623157e+308L
  62. #define LDBL_MAX_10_EXP 308
  63. #define DECIMAL_DIG 17
  64. #endif
  65. #endif /* _FLOAT_H_ */