ceph/src/boost/boost/math/cstdfloat/cstdfloat_limits.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Copyright Christopher Kormanyos 2014.
   3 // Copyright John Maddock 2014.
   4 // Copyright Paul Bristow 2014.
   5 // Distributed under the Boost Software License,
   6 // Version 1.0. (See accompanying file LICENSE_1_0.txt
   7 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9
  10 // Implement quadruple-precision std::numeric_limits<> support.
  11
  12 #ifndef _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_
  13   #define _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_
  14
  15   #include <boost/math/cstdfloat/cstdfloat_types.hpp>
  16
  17   #if defined(BOOST_CSTDFLOAT_HAS_INTERNAL_FLOAT128_T) && defined(BOOST_MATH_USE_FLOAT128) && !defined(BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT)
  18
  19     #include <limits>
  20
  21     // Define the name of the global quadruple-precision function to be used for
  22     // calculating quiet_NaN() in the specialization of std::numeric_limits<>.
  23     #if defined(BOOST_INTEL)
  24       #define BOOST_CSTDFLOAT_FLOAT128_SQRT   __sqrtq
  25     #elif defined(__GNUC__)
  26       #define BOOST_CSTDFLOAT_FLOAT128_SQRT   sqrtq
  27     #endif
  28
  29     // Forward declaration of the quadruple-precision square root function.
  30     extern "C" boost::math::cstdfloat::detail::float_internal128_t BOOST_CSTDFLOAT_FLOAT128_SQRT(boost::math::cstdfloat::detail::float_internal128_t) throw();
  31
  32     namespace std
  33     {
  34       template<>
  35       class numeric_limits<boost::math::cstdfloat::detail::float_internal128_t>
  36       {
  37       public:
  38         BOOST_STATIC_CONSTEXPR bool                                                 is_specialized           = true;
  39         static                 boost::math::cstdfloat::detail::float_internal128_t  (min) () BOOST_NOEXCEPT  { return BOOST_CSTDFLOAT_FLOAT128_MIN; }
  40         static                 boost::math::cstdfloat::detail::float_internal128_t  (max) () BOOST_NOEXCEPT  { return BOOST_CSTDFLOAT_FLOAT128_MAX; }
  41         static                 boost::math::cstdfloat::detail::float_internal128_t  lowest() BOOST_NOEXCEPT  { return -(max)(); }
  42         BOOST_STATIC_CONSTEXPR int                                                  digits                   = 113;
  43         BOOST_STATIC_CONSTEXPR int                                                  digits10                 = 33;
  44         BOOST_STATIC_CONSTEXPR int                                                  max_digits10             = 36;
  45         BOOST_STATIC_CONSTEXPR bool                                                 is_signed                = true;
  46         BOOST_STATIC_CONSTEXPR bool                                                 is_integer               = false;
  47         BOOST_STATIC_CONSTEXPR bool                                                 is_exact                 = false;
  48         BOOST_STATIC_CONSTEXPR int                                                  radix                    = 2;
  49         static                 boost::math::cstdfloat::detail::float_internal128_t  epsilon    ()            { return BOOST_CSTDFLOAT_FLOAT128_EPS; }
  50         static                 boost::math::cstdfloat::detail::float_internal128_t  round_error()            { return BOOST_FLOAT128_C(0.5); }
  51         BOOST_STATIC_CONSTEXPR int                                                  min_exponent             = -16381;
  52         BOOST_STATIC_CONSTEXPR int                                                  min_exponent10           = static_cast<int>((min_exponent * 301L) / 1000L);
  53         BOOST_STATIC_CONSTEXPR int                                                  max_exponent             = +16384;
  54         BOOST_STATIC_CONSTEXPR int                                                  max_exponent10           = static_cast<int>((max_exponent * 301L) / 1000L);
  55         BOOST_STATIC_CONSTEXPR bool                                                 has_infinity             = true;
  56         BOOST_STATIC_CONSTEXPR bool                                                 has_quiet_NaN            = true;
  57         BOOST_STATIC_CONSTEXPR bool                                                 has_signaling_NaN        = false;
  58         BOOST_STATIC_CONSTEXPR float_denorm_style                                   has_denorm               = denorm_absent;
  59         BOOST_STATIC_CONSTEXPR bool                                                 has_denorm_loss          = false;
  60         static                 boost::math::cstdfloat::detail::float_internal128_t  infinity     ()          { return BOOST_FLOAT128_C(1.0) / BOOST_FLOAT128_C(0.0); }
  61         static                 boost::math::cstdfloat::detail::float_internal128_t  quiet_NaN    ()          { return ::BOOST_CSTDFLOAT_FLOAT128_SQRT(BOOST_FLOAT128_C(-1.0)); }
  62         static                 boost::math::cstdfloat::detail::float_internal128_t  signaling_NaN()          { return BOOST_FLOAT128_C(0.0); }
  63         static                 boost::math::cstdfloat::detail::float_internal128_t  denorm_min   ()          { return BOOST_FLOAT128_C(0.0); }
  64         BOOST_STATIC_CONSTEXPR bool                                                 is_iec559                = true;
  65         BOOST_STATIC_CONSTEXPR bool                                                 is_bounded               = false;
  66         BOOST_STATIC_CONSTEXPR bool                                                 is_modulo                = false;
  67         BOOST_STATIC_CONSTEXPR bool                                                 traps                    = false;
  68         BOOST_STATIC_CONSTEXPR bool                                                 tinyness_before          = false;
  69         BOOST_STATIC_CONSTEXPR float_round_style                                    round_style              = round_to_nearest;
  70       };
  71     } // namespace std
  72
  73   #endif // Not BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT (i.e., the user would like to have libquadmath support)
  74
  75 #endif // _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_