libs/multiprecision/performance/arithmetic_backend.hpp
///////////////////////////////////////////////////////////////
// Copyright 2012 John Maddock. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_MATH_FLOAT_BACKEND_HPP
#define BOOST_MATH_FLOAT_BACKEND_HPP
#include <iostream>
#include <iomanip>
#include <sstream>
#include <boost/cstdint.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/math/concepts/real_concept.hpp>
#include <boost/multiprecision/number.hpp>
#include <boost/integer/common_factor_rt.hpp>
#include <boost/type_traits/common_type.hpp>
#include <boost/container_hash/hash.hpp>
namespace boost {
namespace multiprecision {
namespace backends {
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable : 4389 4244 4018 4244 4127)
#endif
template <class Arithmetic>
struct arithmetic_backend
{
typedef mpl::list<short, int, long, long long> signed_types;
typedef mpl::list<unsigned short, unsigned, unsigned long, unsigned long long> unsigned_types;
typedef mpl::list<float, double, long double> float_types;
typedef int exponent_type;
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend() : m_value(0) {}
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend(const arithmetic_backend& o) : m_value(o.m_value) {}
template <class A>
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend(const A& o, const typename enable_if<is_arithmetic<A> >::type* = 0) : m_value(o) {}
template <class A>
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend(const arithmetic_backend<A>& o) : m_value(o.data()) {}
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend& operator=(const arithmetic_backend& o)
{
m_value = o.m_value;
return *this;
}
template <class A>
BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A>, arithmetic_backend&>::type operator=(A i)
{
m_value = i;
return *this;
}
template <class A>
BOOST_MP_CXX14_CONSTEXPR arithmetic_backend& operator=(const arithmetic_backend<A>& i)
{
m_value = i.data();
return *this;
}
arithmetic_backend& operator=(const char* s)
{
#ifndef BOOST_NO_EXCEPTIONS
try
{
#endif
m_value = boost::lexical_cast<Arithmetic>(s);
#ifndef BOOST_NO_EXCEPTIONS
}
catch (const bad_lexical_cast&)
{
throw std::runtime_error(std::string("Unable to interpret the string provided: \"") + s + std::string("\" as a compatible number type."));
}
#endif
return *this;
}
BOOST_MP_CXX14_CONSTEXPR void swap(arithmetic_backend& o)
{
std::swap(m_value, o.m_value);
}
std::string str(std::streamsize digits, std::ios_base::fmtflags f) const
{
std::stringstream ss;
ss.flags(f);
ss << std::setprecision(digits ? digits : std::numeric_limits<Arithmetic>::digits10 + 4) << m_value;
return ss.str();
}
BOOST_MP_CXX14_CONSTEXPR void do_negate(const mpl::true_&)
{
m_value = 1 + ~m_value;
}
BOOST_MP_CXX14_CONSTEXPR void do_negate(const mpl::false_&)
{
m_value = -m_value;
}
BOOST_MP_CXX14_CONSTEXPR void negate()
{
do_negate(mpl::bool_<is_unsigned<Arithmetic>::value>());
}
BOOST_MP_CXX14_CONSTEXPR int compare(const arithmetic_backend& o) const
{
return m_value > o.m_value ? 1 : (m_value < o.m_value ? -1 : 0);
}
template <class A>
BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A>, int>::type compare(A i) const
{
return m_value > static_cast<Arithmetic>(i) ? 1 : (m_value < static_cast<Arithmetic>(i) ? -1 : 0);
}
BOOST_MP_CXX14_CONSTEXPR Arithmetic& data() { return m_value; }
BOOST_MP_CXX14_CONSTEXPR const Arithmetic& data() const { return m_value; }
private:
Arithmetic m_value;
};
template <class R, class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<boost::is_integral<R>::value>::type eval_convert_to(R* result, const arithmetic_backend<Arithmetic>& backend)
{
typedef typename boost::common_type<R, Arithmetic>::type c_type;
BOOST_CONSTEXPR const c_type max = static_cast<c_type>((std::numeric_limits<R>::max)());
BOOST_CONSTEXPR const c_type min = static_cast<c_type>((std::numeric_limits<R>::min)());
c_type ct = static_cast<c_type>(backend.data());
if ((backend.data() < 0) && !std::numeric_limits<R>::is_signed)
BOOST_THROW_EXCEPTION(std::range_error("Attempt to convert negative number to unsigned type."));
if (ct > max)
*result = boost::is_signed<R>::value ? (std::numeric_limits<R>::max)() : backend.data();
else if (std::numeric_limits<Arithmetic>::is_signed && (ct < min))
*result = (std::numeric_limits<R>::min)();
else
*result = backend.data();
}
template <class R, class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename disable_if_c<boost::is_integral<R>::value>::type eval_convert_to(R* result, const arithmetic_backend<Arithmetic>& backend)
{
*result = backend.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR bool eval_eq(const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
return a.data() == b.data();
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2>, bool>::type eval_eq(const arithmetic_backend<Arithmetic>& a, const A2& b)
{
return a.data() == static_cast<Arithmetic>(b);
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR bool eval_lt(const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
return a.data() < b.data();
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2>, bool>::type eval_lt(const arithmetic_backend<Arithmetic>& a, const A2& b)
{
return a.data() < static_cast<Arithmetic>(b);
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR bool eval_gt(const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
return a.data() > b.data();
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2>, bool>::type eval_gt(const arithmetic_backend<Arithmetic>& a, const A2& b)
{
return a.data() > static_cast<Arithmetic>(b);
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_add(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
result.data() += o.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_subtract(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
result.data() -= o.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_multiply(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
result.data() *= o.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<std::numeric_limits<Arithmetic>::has_infinity>::type eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
result.data() /= o.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename disable_if_c<std::numeric_limits<Arithmetic>::has_infinity>::type eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
if (!o.data())
BOOST_THROW_EXCEPTION(std::overflow_error("Divide by zero"));
result.data() /= o.data();
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_add(arithmetic_backend<Arithmetic>& result, const A2& o)
{
result.data() += o;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_subtract(arithmetic_backend<Arithmetic>& result, const A2& o)
{
result.data() -= o;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_multiply(arithmetic_backend<Arithmetic>& result, const A2& o)
{
result.data() *= o;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<(is_arithmetic<A2>::value && !std::numeric_limits<Arithmetic>::has_infinity)>::type
eval_divide(arithmetic_backend<Arithmetic>& result, const A2& o)
{
if (!o)
BOOST_THROW_EXCEPTION(std::overflow_error("Divide by zero"));
result.data() /= o;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<(is_arithmetic<A2>::value && std::numeric_limits<Arithmetic>::has_infinity)>::type
eval_divide(arithmetic_backend<Arithmetic>& result, const A2& o)
{
result.data() /= o;
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_add(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = a.data() + b.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_subtract(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = a.data() - b.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_multiply(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = a.data() * b.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<std::numeric_limits<Arithmetic>::has_infinity>::type eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = a.data() / b.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename disable_if_c<std::numeric_limits<Arithmetic>::has_infinity>::type eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
if (!b.data())
BOOST_THROW_EXCEPTION(std::overflow_error("Divide by zero"));
result.data() = a.data() / b.data();
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_add(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const A2& b)
{
result.data() = a.data() + b;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_subtract(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const A2& b)
{
result.data() = a.data() - b;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_arithmetic<A2> >::type eval_multiply(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const A2& b)
{
result.data() = a.data() * b;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<(is_arithmetic<A2>::value && !std::numeric_limits<Arithmetic>::has_infinity)>::type
eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const A2& b)
{
if (!b)
BOOST_THROW_EXCEPTION(std::overflow_error("Divide by zero"));
result.data() = a.data() / b;
}
template <class Arithmetic, class A2>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<(is_arithmetic<A2>::value && std::numeric_limits<Arithmetic>::has_infinity)>::type
eval_divide(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const A2& b)
{
result.data() = a.data() / b;
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR bool eval_is_zero(const arithmetic_backend<Arithmetic>& val)
{
return val.data() == 0;
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if_c<
(!std::numeric_limits<Arithmetic>::is_specialized || std::numeric_limits<Arithmetic>::is_signed), int>::type
eval_get_sign(const arithmetic_backend<Arithmetic>& val)
{
return val.data() == 0 ? 0 : val.data() < 0 ? -1 : 1;
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR typename disable_if_c<
(std::numeric_limits<Arithmetic>::is_specialized || std::numeric_limits<Arithmetic>::is_signed), int>::type
eval_get_sign(const arithmetic_backend<Arithmetic>& val)
{
return val.data() == 0 ? 0 : 1;
}
template <class T>
inline BOOST_MP_CXX14_CONSTEXPR typename enable_if<is_unsigned<T>, T>::type abs(T v) { return v; }
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_abs(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
using boost::multiprecision::backends::abs;
using std::abs;
result.data() = abs(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_fabs(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
result.data() = std::abs(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_floor(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = floor(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_ceil(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = ceil(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_sqrt(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = sqrt(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR int eval_fpclassify(const arithmetic_backend<Arithmetic>& o)
{
return (boost::math::fpclassify)(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_trunc(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = trunc(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_round(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = round(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_frexp(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, int* v)
{
BOOST_MATH_STD_USING
result.data() = frexp(a.data(), v);
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_ldexp(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, int v)
{
BOOST_MATH_STD_USING
result.data() = ldexp(a.data(), v);
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_exp(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = exp(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_log(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = log(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_log10(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = log10(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_sin(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = sin(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_cos(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = cos(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_tan(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = tan(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_acos(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = acos(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_asin(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = asin(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_atan(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = atan(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_sinh(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = sinh(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_cosh(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = cosh(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_tanh(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& o)
{
BOOST_MATH_STD_USING
result.data() = tanh(o.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_fmod(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
BOOST_MATH_STD_USING
result.data() = fmod(a.data(), b.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_pow(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
BOOST_MATH_STD_USING
result.data() = pow(a.data(), b.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_atan2(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
BOOST_MATH_STD_USING
result.data() = atan2(a.data(), b.data());
}
template <class Arithmetic, class I>
inline BOOST_MP_CXX14_CONSTEXPR void eval_left_shift(arithmetic_backend<Arithmetic>& result, I val)
{
result.data() <<= val;
}
template <class Arithmetic, class I>
inline BOOST_MP_CXX14_CONSTEXPR void eval_right_shift(arithmetic_backend<Arithmetic>& result, I val)
{
result.data() >>= val;
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_modulus(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a)
{
result.data() %= a.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_bitwise_and(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a)
{
result.data() &= a.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_bitwise_or(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a)
{
result.data() |= a.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_bitwise_xor(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a)
{
result.data() ^= a.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_complement(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a)
{
result.data() = ~a.data();
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_gcd(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = boost::integer::gcd(a.data(), b.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR void eval_lcm(arithmetic_backend<Arithmetic>& result, const arithmetic_backend<Arithmetic>& a, const arithmetic_backend<Arithmetic>& b)
{
result.data() = boost::integer::lcm(a.data(), b.data());
}
template <class Arithmetic>
inline BOOST_MP_CXX14_CONSTEXPR std::size_t hash_value(const arithmetic_backend<Arithmetic>& a)
{
boost::hash<Arithmetic> hasher;
return hasher(a.data());
}
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
} // namespace backends
using boost::multiprecision::backends::arithmetic_backend;
template <class Arithmetic>
struct number_category<arithmetic_backend<Arithmetic> > : public mpl::int_<is_integral<Arithmetic>::value ? number_kind_integer : number_kind_floating_point>
{};
namespace detail {
template <class Backend>
struct double_precision_type;
template <class Arithmetic, boost::multiprecision::expression_template_option ET>
struct double_precision_type<number<arithmetic_backend<Arithmetic>, ET> >
{
typedef number<arithmetic_backend<typename double_precision_type<Arithmetic>::type>, ET> type;
};
template <>
struct double_precision_type<arithmetic_backend<boost::int32_t> >
{
typedef arithmetic_backend<boost::int64_t> type;
};
} // namespace detail
}} // namespace boost::multiprecision
#if !(defined(__SGI_STL_PORT) || defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS))
//
// We shouldn't need these to get code to compile, however for the sake of
// "level playing field" performance comparisons they avoid the very slow
// lexical_cast's that would otherwise take place. Definition has to be guarded
// by the inverse of pp-logic in real_concept.hpp which defines these as a workaround
// for STLPort plus some other old/broken standartd libraries.
//
namespace boost { namespace math { namespace tools {
template <>
inline unsigned int real_cast<unsigned int, concepts::real_concept>(concepts::real_concept r)
{
return static_cast<unsigned int>(r.value());
}
template <>
inline int real_cast<int, concepts::real_concept>(concepts::real_concept r)
{
return static_cast<int>(r.value());
}
template <>
inline long real_cast<long, concepts::real_concept>(concepts::real_concept r)
{
return static_cast<long>(r.value());
}
// Converts from T to narrower floating-point types, float, double & long double.
template <>
inline float real_cast<float, concepts::real_concept>(concepts::real_concept r)
{
return static_cast<float>(r.value());
}
template <>
inline double real_cast<double, concepts::real_concept>(concepts::real_concept r)
{
return static_cast<double>(r.value());
}
template <>
inline long double real_cast<long double, concepts::real_concept>(concepts::real_concept r)
{
return r.value();
}
}}} // namespace boost::math::tools
#endif
namespace std {
template <class Arithmetic, boost::multiprecision::expression_template_option ExpressionTemplates>
class numeric_limits<boost::multiprecision::number<boost::multiprecision::arithmetic_backend<Arithmetic>, ExpressionTemplates> > : public std::numeric_limits<Arithmetic>
{
typedef std::numeric_limits<Arithmetic> base_type;
typedef boost::multiprecision::number<boost::multiprecision::arithmetic_backend<Arithmetic>, ExpressionTemplates> number_type;
public:
BOOST_STATIC_CONSTEXPR number_type(min)() BOOST_NOEXCEPT { return (base_type::min)(); }
BOOST_STATIC_CONSTEXPR number_type(max)() BOOST_NOEXCEPT { return (base_type::max)(); }
BOOST_STATIC_CONSTEXPR number_type lowest() BOOST_NOEXCEPT { return -(max)(); }
BOOST_STATIC_CONSTEXPR number_type epsilon() BOOST_NOEXCEPT { return base_type::epsilon(); }
BOOST_STATIC_CONSTEXPR number_type round_error() BOOST_NOEXCEPT { return epsilon() / 2; }
BOOST_STATIC_CONSTEXPR number_type infinity() BOOST_NOEXCEPT { return base_type::infinity(); }
BOOST_STATIC_CONSTEXPR number_type quiet_NaN() BOOST_NOEXCEPT { return base_type::quiet_NaN(); }
BOOST_STATIC_CONSTEXPR number_type signaling_NaN() BOOST_NOEXCEPT { return base_type::signaling_NaN(); }
BOOST_STATIC_CONSTEXPR number_type denorm_min() BOOST_NOEXCEPT { return base_type::denorm_min(); }
};
template <>
class numeric_limits<boost::math::concepts::real_concept> : public std::numeric_limits<long double>
{
typedef std::numeric_limits<long double> base_type;
typedef boost::math::concepts::real_concept number_type;
public:
static const number_type(min)() BOOST_NOEXCEPT { return (base_type::min)(); }
static const number_type(max)() BOOST_NOEXCEPT { return (base_type::max)(); }
static const number_type lowest() BOOST_NOEXCEPT { return -(max)(); }
static const number_type epsilon() BOOST_NOEXCEPT { return base_type::epsilon(); }
static const number_type round_error() BOOST_NOEXCEPT { return epsilon() / 2; }
static const number_type infinity() BOOST_NOEXCEPT { return base_type::infinity(); }
static const number_type quiet_NaN() BOOST_NOEXCEPT { return base_type::quiet_NaN(); }
static const number_type signaling_NaN() BOOST_NOEXCEPT { return base_type::signaling_NaN(); }
static const number_type denorm_min() BOOST_NOEXCEPT { return base_type::denorm_min(); }
};
} // namespace std
#include <boost/multiprecision/detail/integer_ops.hpp>
#endif