303    BOOST_CHECK((::boost::math::signbit)(one) == 0);  in test()
304    BOOST_CHECK((::boost::math::signbit)(minus_one) > 0);  in test()
305    BOOST_CHECK((::boost::math::signbit)(zero) == 0);  in test()
306    BOOST_CHECK((::boost::math::signbit)(one + 2) == 0);  in test()
307    BOOST_CHECK((::boost::math::signbit)(minus_one - 30) > 0);  in test()
310    BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(one)) > 0);  in test()
312    BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(minus_one)) == 0);  in test()
315    BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(one + 2)) > 0);  in test()
317    BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(minus_one - 30)) == 0);  in test()
321    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(one, one)) == 0);  in test()
323    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(one, minus_one)) > 0);  in test()
325    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(minus_one, one)) == 0);  in test()
327    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(minus_one, minus_one)) > 0);  in test()
329    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(one + 1, one + 2)) == 0);  in test()
331    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(one + 30, minus_one - 20)) > 0);  in test()
333    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(minus_one + 2, one + 2)) == 0);  in test()
335    BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(minus_one - 20, minus_one - 30)) > 0);  in test()
349       BOOST_CHECK((::boost::math::signbit)(neg_zero_test) > 0);  in test()
350       BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(zero)) > 0);  in test()
352       BOOST_CHECK((::boost::math::signbit)(boost::math::changesign(neg_zero_test)) == 0);  in test()
354       BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(zero, one)) == 0);  in test()
356       BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(zero, minus_one)) > 0);  in test()
358       BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(neg_zero_test, one)) == 0);  in test()
360       BOOST_CHECK((::boost::math::signbit)(boost::math::copysign(neg_zero_test, minus_one)) > 0);  in test()