| /////////////////////////////////////////////////////////////////////////////// |
| // 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_MATH_CSTDFLOAT_LIMITS_2014_01_09_HPP_ |
| #define BOOST_MATH_CSTDFLOAT_LIMITS_2014_01_09_HPP_ |
| |
| #include <boost/math/cstdfloat/cstdfloat_types.hpp> |
| |
| #if defined(__GNUC__) && defined(BOOST_MATH_USE_FLOAT128) |
| // |
| // This is the only way we can avoid |
| // warning: non-standard suffix on floating constant [-Wpedantic] |
| // when building with -Wall -pedantic. Neither __extension__ |
| // nor #pragma diagnostic ignored work :( |
| // |
| #pragma GCC system_header |
| #endif |
| |
| #if defined(BOOST_CSTDFLOAT_HAS_INTERNAL_FLOAT128_T) && defined(BOOST_MATH_USE_FLOAT128) && !defined(BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT) && (!defined(_GLIBCXX_RELEASE) || (defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE < 14)) |
| |
| #include <limits> |
| #include <boost/math/tools/nothrow.hpp> |
| |
| // 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(__INTEL_COMPILER) |
| #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) BOOST_MATH_NOTHROW; |
| |
| namespace std |
| { |
| template<> |
| class numeric_limits<boost::math::cstdfloat::detail::float_internal128_t> |
| { |
| public: |
| static constexpr bool is_specialized = true; |
| static boost::math::cstdfloat::detail::float_internal128_t (min) () noexcept { return BOOST_CSTDFLOAT_FLOAT128_MIN; } |
| static boost::math::cstdfloat::detail::float_internal128_t (max) () noexcept { return BOOST_CSTDFLOAT_FLOAT128_MAX; } |
| static boost::math::cstdfloat::detail::float_internal128_t lowest() noexcept { return -(max)(); } |
| static constexpr int digits = 113; |
| static constexpr int digits10 = 33; |
| static constexpr int max_digits10 = 36; |
| static constexpr bool is_signed = true; |
| static constexpr bool is_integer = false; |
| static constexpr bool is_exact = false; |
| 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); } |
| static constexpr int min_exponent = -16381; |
| static constexpr int min_exponent10 = static_cast<int>((min_exponent * 301L) / 1000L); |
| static constexpr int max_exponent = +16384; |
| static constexpr int max_exponent10 = static_cast<int>((max_exponent * 301L) / 1000L); |
| static constexpr bool has_infinity = true; |
| static constexpr bool has_quiet_NaN = true; |
| static constexpr bool has_signaling_NaN = false; |
| static constexpr float_denorm_style has_denorm = denorm_present; |
| 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_CSTDFLOAT_FLOAT128_DENORM_MIN; } |
| static constexpr bool is_iec559 = true; |
| static constexpr bool is_bounded = true; |
| static constexpr bool is_modulo = false; |
| static constexpr bool traps = false; |
| static constexpr bool tinyness_before = false; |
| 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_MATH_CSTDFLOAT_LIMITS_2014_01_09_HPP_ |
| |
