94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
// (C) Copyright John Maddock 2021.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// We deliberately use assert in here:
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//
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#ifndef BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP
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#define BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP
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#include <boost/multiprecision/detail/standalone_config.hpp>
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#ifndef BOOST_MP_STANDALONE
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#include <boost/cstdfloat.hpp>
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#if defined(BOOST_MATH_USE_FLOAT128) && !defined(BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT)
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# define BOOST_MP_HAVE_CSTDFLOAT
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#endif
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#endif
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#if defined(BOOST_HAS_FLOAT128)
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namespace boost
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{
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namespace multiprecision
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{
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namespace float128_procs
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{
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extern "C" __float128 ldexpq(__float128, int) throw();
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extern "C" __float128 frexpq(__float128, int*) throw();
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extern "C" __float128 floorq(__float128) throw();
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extern "C" __float128 nextafterq(__float128, __float128) throw();
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extern "C" int isinfq(__float128) throw();
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extern "C" int isnanq(__float128) throw();
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extern "C" __float128 strtoflt128(const char*, char**) throw();
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#ifdef BOOST_MP_HAVE_CSTDFLOAT
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using std::ldexp;
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using std::frexp;
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using std::floor;
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#else
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inline __float128 ldexp(__float128 f, int i) throw() { return ldexpq(f, i); }
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inline __float128 frexp(__float128 f, int* p) throw() { return frexpq(f, p); }
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inline __float128 floor(__float128 f) throw() { return floorq(f); }
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#endif
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}
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namespace detail {
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template <class T>
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struct is_float128 : public std::is_same<__float128, T>
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{};
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}
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}
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}
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namespace boost {
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namespace math {
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inline __float128 float_next(const __float128& f)
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{
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return boost::multiprecision::float128_procs::nextafterq(f, 2 * f);
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}
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inline int (isinf)(const __float128& f)
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{
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return boost::multiprecision::float128_procs::isinfq(f);
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}
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inline int (isnan)(const __float128& f)
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{
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return boost::multiprecision::float128_procs::isnanq(f);
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}
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}}
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#define BOOST_MP_FLOAT128_USING using boost::multiprecision::float128_procs::ldexp; using boost::multiprecision::float128_procs::frexp; using boost::multiprecision::float128_procs::floor; using boost::math::isinf; using boost::math::isnan;
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#else
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#define BOOST_MP_FLOAT128_USING
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namespace boost {
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namespace multiprecision {
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namespace detail {
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template <class T>
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struct is_float128 : public std::false_type
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{};
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}}} // namespace boost::multiprecision::detail
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#endif
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#endif // BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP
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