id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
8692,setting mpfr precision uses wrong precision and trashes value,claude@…,John Maddock,"http://svn.boost.org/svn/boost/trunk/boost/multiprecision/mpfr.hpp
Two bugs in boost/multiprecision/mpfr.hpp:920-923

1. set_prec trashes the value, should use prec_round
2. precision is converted from bits to digits10, should be from digits10 to bits

{{{
void precision(unsigned digits10) BOOST_NOEXCEPT
{
  mpfr_set_prec(this->m_data, multiprecision::detail::digits2_2_10((digits10)));
}
}}}

should be more like

{{{
void precision(unsigned digits10) BOOST_NOEXCEPT
{
  mpfr_prec_round(this->m_data, multiprecision::detail::digits10_2_2((digits10)), GMP_RNDN);
}
}}}
",Bugs,closed,To Be Determined,multiprecision,Boost Development Trunk,Problem,fixed,,