mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-30 12:25:51 +00:00
Code Activity

push outline of using cjust for overflow premise

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-09-09 09:56:00 +02:00
parent a5b7f9d77b
commit 611c28fc47
8 changed files with 101 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/math/dd/dd_fdd.cpp
View file

@ -332,5 +332,35 @@ namespace dd {
return true;
}
rational fdd::max(bdd b) const {
SASSERT(!b.is_false());
rational result(0);
for (unsigned i = num_bits(); i-- > 0; ) {
unsigned v = m_pos2var[i];
bdd w = m->mk_var(v);
bdd hi = b.cofactor(w);
if (!hi.is_false()) {
b = hi;
result += rational::power_of_two(i);
}
}
return result;
}
rational fdd::min(bdd b) const {
SASSERT(!b.is_false());
rational result(0);
for (unsigned i = num_bits(); i-- > 0; ) {
unsigned v = m_pos2var[i];
bdd nw = m->mk_nvar(v);
bdd lo = b.cofactor(nw);
if (lo.is_false())
result += rational::power_of_two(i);
else
b = lo;
}
return result;
}
}