Hello John, i switched std::numeric_limits<float128> completely to constexpr because it bothered me a lot. Especially: - quiet_NaN (removed sqrt) - has/signaling_NaN adjusted Hope that's ok.
regards Gero
// 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) #include <limits> namespace std { template <> struct numeric_limits<boost::math::cstdfloat::detail::float_internal128_t> { static constexpr bool is_specialized = true; static constexpr boost::math::cstdfloat::detail::float_internal128_t min() noexcept { return BOOST_CSTDFLOAT_FLOAT128_MIN; } static constexpr boost::math::cstdfloat::detail::float_internal128_t max() noexcept { return BOOST_CSTDFLOAT_FLOAT128_MAX; } static constexpr 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 constexpr boost::math::cstdfloat::detail::float_internal128_t epsilon() noexcept { return BOOST_CSTDFLOAT_FLOAT128_EPS; } static constexpr boost::math::cstdfloat::detail::float_internal128_t round_error() noexcept { return BOOST_FLOAT128_C(0.5); } static constexpr int min_exponent = -16381; static constexpr int min_exponent10 = int((min_exponent * 301L) / 1000L); static constexpr int max_exponent = +16384; static constexpr int max_exponent10 = int((max_exponent * 301L) / 1000L); static constexpr bool has_infinity = true; static constexpr bool has_quiet_NaN = true; #if defined(__clang__) || defined(__GNUC__) static constexpr bool has_signaling_NaN = true; #else // todo other compiler static constexpr bool has_signaling_NaN = false; #endif static constexpr float_denorm_style has_denorm = denorm_present; static constexpr bool has_denorm_loss = false; static constexpr boost::math::cstdfloat::detail::float_internal128_t infinity() noexcept { return BOOST_FLOAT128_C(1.0) / BOOST_FLOAT128_C(0.0); } static constexpr boost::math::cstdfloat::detail::float_internal128_t quiet_NaN() noexcept { return BOOST_FLOAT128_C(0.0) / BOOST_FLOAT128_C(0.0); } static constexpr boost::math::cstdfloat::detail::float_internal128_t signaling_NaN() noexcept { #if defined(__clang__) || defined(__GNUC__) return __builtin_nansf128(""); #else // todo other compiler return BOOST_FLOAT128_C(0.0); #endif } static constexpr boost::math::cstdfloat::detail::float_internal128_t denorm_min() noexcept { 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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