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///////////////////////////////////////////////////////////////////////////////
// Copyright 2016 John Maddock. 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)
#include <boost/multiprecision/cpp_bin_float.hpp>
int main()
{
typedef boost::multiprecision::number<boost::multiprecision::cpp_bin_float<8, boost::multiprecision::backends::digit_base_2> > quarter_float;
quarter_float qf(256);
unsigned int ui = qf.convert_to<unsigned int>();
if (ui != 256)
return 1;
std::uintmax_t m(1), n;
m <<= std::numeric_limits<std::uintmax_t>::digits - 1;
qf = m;
n = qf.convert_to<std::uintmax_t>();
if (m != n)
return 2;
qf *= 2;
n = qf.convert_to<std::uintmax_t>();
m = (std::numeric_limits<std::uintmax_t>::max)();
if (m != n)
return 3;
qf = 256;
int si = qf.convert_to<int>();
if (si != 256)
return 4;
std::intmax_t sm(1), sn;
sm <<= std::numeric_limits<std::intmax_t>::digits - 1;
qf = sm;
sn = qf.convert_to<std::intmax_t>();
if (sm != sn)
return 5;
qf *= 2;
sn = qf.convert_to<std::intmax_t>();
sm = (std::numeric_limits<std::intmax_t>::max)();
if (sm != sn)
return 6;
// Again with negative numbers:
qf = -256;
si = qf.convert_to<int>();
if (si != -256)
return 7;
sm = 1;
sm <<= std::numeric_limits<std::intmax_t>::digits - 1;
sm = -sm;
qf = sm;
sn = qf.convert_to<std::intmax_t>();
if (sm != sn)
return 8;
qf *= 2;
sn = qf.convert_to<std::intmax_t>();
sm = (std::numeric_limits<std::intmax_t>::min)();
if (sm != sn)
return 9;
// Now try conversion to cpp_int:
qf = 256;
boost::multiprecision::cpp_int i = qf.convert_to<boost::multiprecision::cpp_int>(), j;
if (i != 256)
return 10;
qf = ldexp(qf, 126);
i = qf.convert_to<boost::multiprecision::cpp_int>();
j = 256;
j <<= 126;
if (i != j)
return 11;
return 0;
}
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