include/float.h

   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 #define DECIMAL_DIG 21
  42
  43 #elif defined __aarch64__ || defined __riscv
  44 /*
  45  * Use values from:
  46  * gcc -dM -E -xc /dev/null | grep LDBL | sed -e "s/__//g"
  47  */
  48 #define LDBL_MANT_DIG 113
  49 #define LDBL_DIG 33
  50 #define LDBL_EPSILON 1.92592994438723585305597794258492732e-34L
  51 #define LDBL_MIN_EXP (-16381)
  52 #define LDBL_MIN 3.36210314311209350626267781732175260e-4932L
  53 #define LDBL_MIN_10_EXP (-4931)
  54 #define LDBL_MAX_EXP 16384
  55 #define LDBL_MAX 1.18973149535723176508575932662800702e+4932L
  56 #define LDBL_MAX_EXP 16384
  57 #define DECIMAL_DIG 36
  58
  59 #else
  60
  61 /* same as IEEE double */
  62 #define LDBL_MANT_DIG 53
  63 #define LDBL_DIG 15
  64 #define LDBL_EPSILON 2.2204460492503131e-16L
  65 #define LDBL_MIN_EXP (-1021)
  66 #define LDBL_MIN 2.2250738585072014e-308L
  67 #define LDBL_MIN_10_EXP (-307)
  68 #define LDBL_MAX_EXP 1024
  69 #define LDBL_MAX 1.7976931348623157e+308L
  70 #define LDBL_MAX_10_EXP 308
  71 #define DECIMAL_DIG 17
  72
  73 #endif
  74
  75 #endif /* _FLOAT_H_ */