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Diffstat (limited to 'boost/math/cstdfloat/cstdfloat_limits.hpp')
| -rw-r--r-- | boost/math/cstdfloat/cstdfloat_limits.hpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/boost/math/cstdfloat/cstdfloat_limits.hpp b/boost/math/cstdfloat/cstdfloat_limits.hpp new file mode 100644 index 0000000000..c04062639a --- /dev/null +++ b/boost/math/cstdfloat/cstdfloat_limits.hpp @@ -0,0 +1,75 @@ +/////////////////////////////////////////////////////////////////////////////// +// Copyright Christopher Kormanyos 2014. +// Copyright John Maddock 2014. +// Copyright Paul Bristow 2014. +// Distributed under the Boost Software License, +// Version 1.0. (See accompanying file LICENSE_1_0.txt +// or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +// Implement quadruple-precision std::numeric_limits<> support. + +#ifndef _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_ + #define _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_ + + #include <boost/math/cstdfloat/cstdfloat_types.hpp> + + #if defined(BOOST_CSTDFLOAT_HAS_INTERNAL_FLOAT128_T) && defined(BOOST_MATH_USE_FLOAT128) && !defined(BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT) + + #include <limits> + + // Define the name of the global quadruple-precision function to be used for + // calculating quiet_NaN() in the specialization of std::numeric_limits<>. + #if defined(BOOST_INTEL) + #define BOOST_CSTDFLOAT_FLOAT128_SQRT __sqrtq + #elif defined(__GNUC__) + #define BOOST_CSTDFLOAT_FLOAT128_SQRT sqrtq + #endif + + // Forward declaration of the quadruple-precision square root function. + extern "C" boost::math::cstdfloat::detail::float_internal128_t BOOST_CSTDFLOAT_FLOAT128_SQRT(boost::math::cstdfloat::detail::float_internal128_t) throw(); + + namespace std + { + template<> + class numeric_limits<boost::math::cstdfloat::detail::float_internal128_t> + { + public: + BOOST_STATIC_CONSTEXPR bool is_specialized = true; + static boost::math::cstdfloat::detail::float_internal128_t (min) () BOOST_NOEXCEPT { return BOOST_CSTDFLOAT_FLOAT128_MIN; } + static boost::math::cstdfloat::detail::float_internal128_t (max) () BOOST_NOEXCEPT { return BOOST_CSTDFLOAT_FLOAT128_MAX; } + static boost::math::cstdfloat::detail::float_internal128_t lowest() BOOST_NOEXCEPT { return -(max)(); } + BOOST_STATIC_CONSTEXPR int digits = 113; + BOOST_STATIC_CONSTEXPR int digits10 = 34; + BOOST_STATIC_CONSTEXPR int max_digits10 = 36; + BOOST_STATIC_CONSTEXPR bool is_signed = true; + BOOST_STATIC_CONSTEXPR bool is_integer = false; + BOOST_STATIC_CONSTEXPR bool is_exact = false; + BOOST_STATIC_CONSTEXPR int radix = 2; + static boost::math::cstdfloat::detail::float_internal128_t epsilon () { return BOOST_CSTDFLOAT_FLOAT128_EPS; } + static boost::math::cstdfloat::detail::float_internal128_t round_error() { return BOOST_FLOAT128_C(0.5); } + BOOST_STATIC_CONSTEXPR int min_exponent = -16381; + BOOST_STATIC_CONSTEXPR int min_exponent10 = static_cast<int>((min_exponent * 301L) / 1000L); + BOOST_STATIC_CONSTEXPR int max_exponent = +16384; + BOOST_STATIC_CONSTEXPR int max_exponent10 = static_cast<int>((max_exponent * 301L) / 1000L); + BOOST_STATIC_CONSTEXPR bool has_infinity = true; + BOOST_STATIC_CONSTEXPR bool has_quiet_NaN = true; + BOOST_STATIC_CONSTEXPR bool has_signaling_NaN = false; + BOOST_STATIC_CONSTEXPR float_denorm_style has_denorm = denorm_absent; + BOOST_STATIC_CONSTEXPR bool has_denorm_loss = false; + static boost::math::cstdfloat::detail::float_internal128_t infinity () { return BOOST_FLOAT128_C(1.0) / BOOST_FLOAT128_C(0.0); } + static boost::math::cstdfloat::detail::float_internal128_t quiet_NaN () { return ::BOOST_CSTDFLOAT_FLOAT128_SQRT(BOOST_FLOAT128_C(-1.0)); } + static boost::math::cstdfloat::detail::float_internal128_t signaling_NaN() { return BOOST_FLOAT128_C(0.0); } + static boost::math::cstdfloat::detail::float_internal128_t denorm_min () { return BOOST_FLOAT128_C(0.0); } + BOOST_STATIC_CONSTEXPR bool is_iec559 = true; + BOOST_STATIC_CONSTEXPR bool is_bounded = false; + BOOST_STATIC_CONSTEXPR bool is_modulo = false; + BOOST_STATIC_CONSTEXPR bool traps = false; + BOOST_STATIC_CONSTEXPR bool tinyness_before = false; + BOOST_STATIC_CONSTEXPR float_round_style round_style = round_to_nearest; + }; + } // namespace std + + #endif // Not BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT (i.e., the user would like to have libquadmath support) + +#endif // _BOOST_CSTDFLOAT_LIMITS_2014_01_09_HPP_ |