include/float.h

   1 #ifndef _LIBC_FLOAT_H
   2 #define _LIBC_FLOAT_H
   3
   4 #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
   5 #include <bits/libc-header-start.h>
   6
   7 /* Some tests also define this macro, requiring a check here to avoid
   8    errors for duplicate definitions (see GCC bug 91451).  */
   9 #if !defined _ISOMAC && !defined __STDC_WANT_IEC_60559_TYPES_EXT__
  10 # define __STDC_WANT_IEC_60559_TYPES_EXT__
  11 #endif
  12
  13 #include_next <float.h>
  14
  15 /* Supplement float.h macros for _FloatN and _FloatNx for older
  16    compilers which do not yet support the type.  These are described
  17    in TS 18661-3.  */
  18 #include <features.h>
  19 #include <bits/floatn.h>
  20 #if !__GNUC_PREREQ (7, 0) && __GLIBC_USE (IEC_60559_TYPES_EXT)
  21
  22 # if __HAVE_FLOAT128
  23 #  define FLT128_MANT_DIG       113
  24 #  define FLT128_DECIMAL_DIG    36
  25 #  define FLT128_DIG            33
  26 #  define FLT128_MIN_EXP        (-16381)
  27 #  define FLT128_MIN_10_EXP     (-4931)
  28 #  define FLT128_MAX_EXP        16384
  29 #  define FLT128_MAX_10_EXP     4932
  30 #  define FLT128_MAX                                    \
  31   __f128 (1.18973149535723176508575932662800702e+4932)
  32 #  define FLT128_EPSILON                                \
  33   __f128 (1.92592994438723585305597794258492732e-34)
  34 #  define FLT128_MIN                                    \
  35   __f128 (3.36210314311209350626267781732175260e-4932)
  36 #  define FLT128_TRUE_MIN                               \
  37   __f128 (6.47517511943802511092443895822764655e-4966)
  38 # endif
  39
  40 /* Types other than _Float128 are typedefs for other types with old
  41    compilers.  */
  42
  43 # if __HAVE_FLOAT32
  44 #  define FLT32_MANT_DIG        FLT_MANT_DIG
  45 #  define FLT32_DECIMAL_DIG     FLT_DECIMAL_DIG
  46 #  define FLT32_DIG             FLT_DIG
  47 #  define FLT32_MIN_EXP         FLT_MIN_EXP
  48 #  define FLT32_MIN_10_EXP      FLT_MIN_10_EXP
  49 #  define FLT32_MAX_EXP         FLT_MAX_EXP
  50 #  define FLT32_MAX_10_EXP      FLT_MAX_10_EXP
  51 #  define FLT32_MAX             FLT_MAX
  52 #  define FLT32_EPSILON         FLT_EPSILON
  53 #  define FLT32_MIN             FLT_MIN
  54 #  define FLT32_TRUE_MIN        FLT_TRUE_MIN
  55 # endif
  56
  57 # if __HAVE_FLOAT64
  58 #  define FLT64_MANT_DIG        DBL_MANT_DIG
  59 #  define FLT64_DECIMAL_DIG     DBL_DECIMAL_DIG
  60 #  define FLT64_DIG             DBL_DIG
  61 #  define FLT64_MIN_EXP         DBL_MIN_EXP
  62 #  define FLT64_MIN_10_EXP      DBL_MIN_10_EXP
  63 #  define FLT64_MAX_EXP         DBL_MAX_EXP
  64 #  define FLT64_MAX_10_EXP      DBL_MAX_10_EXP
  65 #  define FLT64_MAX             DBL_MAX
  66 #  define FLT64_EPSILON         DBL_EPSILON
  67 #  define FLT64_MIN             DBL_MIN
  68 #  define FLT64_TRUE_MIN        DBL_TRUE_MIN
  69 # endif
  70
  71 # if __HAVE_FLOAT32X
  72 #  define FLT32X_MANT_DIG       DBL_MANT_DIG
  73 #  define FLT32X_DECIMAL_DIG    DBL_DECIMAL_DIG
  74 #  define FLT32X_DIG            DBL_DIG
  75 #  define FLT32X_MIN_EXP        DBL_MIN_EXP
  76 #  define FLT32X_MIN_10_EXP     DBL_MIN_10_EXP
  77 #  define FLT32X_MAX_EXP        DBL_MAX_EXP
  78 #  define FLT32X_MAX_10_EXP     DBL_MAX_10_EXP
  79 #  define FLT32X_MAX            DBL_MAX
  80 #  define FLT32X_EPSILON        DBL_EPSILON
  81 #  define FLT32X_MIN            DBL_MIN
  82 #  define FLT32X_TRUE_MIN       DBL_TRUE_MIN
  83 # endif
  84
  85 # if __HAVE_FLOAT64X
  86 #  if __HAVE_FLOAT64X_LONG_DOUBLE
  87 #   define FLT64X_MANT_DIG      LDBL_MANT_DIG
  88 #   define FLT64X_DECIMAL_DIG   LDBL_DECIMAL_DIG
  89 #   define FLT64X_DIG           LDBL_DIG
  90 #   define FLT64X_MIN_EXP       LDBL_MIN_EXP
  91 #   define FLT64X_MIN_10_EXP    LDBL_MIN_10_EXP
  92 #   define FLT64X_MAX_EXP       LDBL_MAX_EXP
  93 #   define FLT64X_MAX_10_EXP    LDBL_MAX_10_EXP
  94 #   define FLT64X_MAX           LDBL_MAX
  95 #   define FLT64X_EPSILON       LDBL_EPSILON
  96 #   define FLT64X_MIN           LDBL_MIN
  97 #   define FLT64X_TRUE_MIN      LDBL_TRUE_MIN
  98 #  else
  99 #   define FLT64X_MANT_DIG      FLT128_MANT_DIG
 100 #   define FLT64X_DECIMAL_DIG   FLT128_DECIMAL_DIG
 101 #   define FLT64X_DIG           FLT128_DIG
 102 #   define FLT64X_MIN_EXP       FLT128_MIN_EXP
 103 #   define FLT64X_MIN_10_EXP    FLT128_MIN_10_EXP
 104 #   define FLT64X_MAX_EXP       FLT128_MAX_EXP
 105 #   define FLT64X_MAX_10_EXP    FLT128_MAX_10_EXP
 106 #   define FLT64X_MAX           FLT128_MAX
 107 #   define FLT64X_EPSILON       FLT128_EPSILON
 108 #   define FLT64X_MIN           FLT128_MIN
 109 #   define FLT64X_TRUE_MIN      FLT128_TRUE_MIN
 110 #  endif
 111 # endif
 112
 113 #endif
 114
 115 #endif /* _LIBC_FLOAT_H */