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Bugfix for distinct of floats.

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This commit is contained in:
Christoph M. Wintersteiger 2015-06-12 12:58:19 +01:00
parent f84d6bf5bb
commit 6980fb3035
3 changed files with 24 additions and 2 deletions
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14
src/ast/fpa/fpa2bv_converter.cpp
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@ -93,6 +93,20 @@ void fpa2bv_converter::mk_ite(expr * c, expr * t, expr * f, expr_ref & result) {
mk_fp(sgn, e, s, result);
}
void fpa2bv_converter::mk_distinct(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
// Note: in SMT there is only one NaN, so multiple of them are considered
// equal, thus (distinct NaN NaN) is false, even if the two NaNs have
// different bitwise representations (see also mk_eq).
result = m.mk_true();
for (unsigned i = 0; i < num; i++) {
for (unsigned j = i+1; j < num; j++) {
expr_ref eq(m);
mk_eq(args[i], args[j], eq);
m_simp.mk_and(result, m.mk_not(eq), result);
}
}
}
void fpa2bv_converter::mk_numeral(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
SASSERT(num == 0);
SASSERT(f->get_num_parameters() == 1);