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Fix bonus subtraction in fp.rem. Fixes #4564. Fixes most of #2381.

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Christoph M. Wintersteiger 2020-11-06 20:54:10 +00:00
parent 372bb4b25a
commit eadf755628
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2 changed files with 38 additions and 36 deletions
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src/util/mpf.cpp
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@ -1309,7 +1309,7 @@ void mpf_manager::partial_remainder(mpf & x, mpf const & y, mpf_exp_t const & ex
bool Q_sgn = x_div_y_sgn;
mpf_exp_t Q_exp = x_div_y_exp;
scoped_mpz Q_sig(m_mpz_manager), Q_rem(m_mpz_manager);
unsigned Q_shft = (sbits-1) + (sbits+3) - (unsigned) (partial ? N :Q_exp);
unsigned Q_shft = (sbits-1) + (sbits+3) - (unsigned) (partial ? N : Q_exp);
if (partial) {
// Round according to MPF_ROUND_TOWARD_ZERO
SASSERT(0 < N && N < Q_exp && Q_exp < INT_MAX);