boost/multiprecision/detail/float128_functions.hpp
// (C) Copyright John Maddock 2021.
// Use, modification and distribution are subject to 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)
//
// We deliberately use assert in here:
//
#ifndef BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP
#define BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP
#include <boost/multiprecision/detail/standalone_config.hpp>
#ifndef BOOST_MP_STANDALONE
#include <boost/cstdfloat.hpp>
#if defined(BOOST_MATH_USE_FLOAT128) && !defined(BOOST_CSTDFLOAT_NO_LIBQUADMATH_SUPPORT)
# define BOOST_MP_HAVE_CSTDFLOAT
#endif
#endif
#if defined(BOOST_HAS_FLOAT128)
namespace boost
{
namespace multiprecision
{
namespace float128_procs
{
extern "C" __float128 ldexpq(__float128, int) throw();
extern "C" __float128 frexpq(__float128, int*) throw();
extern "C" __float128 floorq(__float128) throw();
extern "C" __float128 nextafterq(__float128, __float128) throw();
extern "C" int isinfq(__float128) throw();
extern "C" int isnanq(__float128) throw();
extern "C" __float128 strtoflt128(const char*, char**) throw();
#ifdef BOOST_MP_HAVE_CSTDFLOAT
using std::ldexp;
using std::frexp;
using std::floor;
#else
inline __float128 ldexp(__float128 f, int i) throw() { return ldexpq(f, i); }
inline __float128 frexp(__float128 f, int* p) throw() { return frexpq(f, p); }
inline __float128 floor(__float128 f) throw() { return floorq(f); }
#endif
}
namespace detail {
template <class T>
struct is_float128 : public std::is_same<__float128, T>
{};
}
}
}
namespace boost {
namespace math {
inline __float128 float_next(const __float128& f)
{
return boost::multiprecision::float128_procs::nextafterq(f, 2 * f);
}
inline int (isinf)(const __float128& f)
{
return boost::multiprecision::float128_procs::isinfq(f);
}
inline int (isnan)(const __float128& f)
{
return boost::multiprecision::float128_procs::isnanq(f);
}
}}
#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;
#else
#define BOOST_MP_FLOAT128_USING
namespace boost {
namespace multiprecision {
namespace detail {
template <class T>
struct is_float128 : public std::false_type
{};
}}} // namespace boost::multiprecision::detail
#endif
#endif // BOOST_MP_DETAIL_FLOAT128_FUNCTIONS_HPP