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- ///////////////////////////////////////////////////////////////////////////////
- // 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_
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