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  1. #ifndef _FLOAT_H_
  2. #define _FLOAT_H_
  3.  
  4. #define FLT_RADIX 2
  5.  
  6. /* IEEE float */
  7. #define FLT_MANT_DIG 24
  8. #define FLT_DIG 6
  9. #define FLT_ROUNDS 1
  10. #define FLT_EPSILON 1.19209290e-07F
  11. #define FLT_MIN_EXP (-125)
  12. #define FLT_MIN 1.17549435e-38F
  13. #define FLT_MIN_10_EXP (-37)
  14. #define FLT_MAX_EXP 128
  15. #define FLT_MAX 3.40282347e+38F
  16. #define FLT_MAX_10_EXP 38
  17.  
  18. /* IEEE double */
  19. #define DBL_MANT_DIG 53
  20. #define DBL_DIG 15
  21. #define DBL_EPSILON 2.2204460492503131e-16
  22. #define DBL_MIN_EXP (-1021)
  23. #define DBL_MIN 2.2250738585072014e-308
  24. #define DBL_MIN_10_EXP (-307)
  25. #define DBL_MAX_EXP 1024
  26. #define DBL_MAX 1.7976931348623157e+308
  27. #define DBL_MAX_10_EXP 308
  28.  
  29. /* horrible intel long double */
  30. #if defined __i386__ || defined __x86_64__
  31.  
  32. #define LDBL_MANT_DIG 64
  33. #define LDBL_DIG 18
  34. #define LDBL_EPSILON 1.08420217248550443401e-19L
  35. #define LDBL_MIN_EXP (-16381)
  36. #define LDBL_MIN 3.36210314311209350626e-4932L
  37. #define LDBL_MIN_10_EXP (-4931)
  38. #define LDBL_MAX_EXP 16384
  39. #define LDBL_MAX 1.18973149535723176502e+4932L
  40. #define LDBL_MAX_10_EXP 4932
  41.  
  42. #else
  43.  
  44. /* same as IEEE double */
  45. #define LDBL_MANT_DIG 53
  46. #define LDBL_DIG 15
  47. #define LDBL_EPSILON 2.2204460492503131e-16
  48. #define LDBL_MIN_EXP (-1021)
  49. #define LDBL_MIN 2.2250738585072014e-308
  50. #define LDBL_MIN_10_EXP (-307)
  51. #define LDBL_MAX_EXP 1024
  52. #define LDBL_MAX 1.7976931348623157e+308
  53. #define LDBL_MAX_10_EXP 308
  54.  
  55. #endif
  56.  
  57. #ifndef NAN
  58. # define NAN    (__nan__)
  59. #endif
  60.  
  61. #ifndef INFINITY
  62. # define INFINITY       (__inf__)
  63. #endif
  64.  
  65. #endif /* _FLOAT_H_ */
  66.