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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-04-16 10:37:53 -07:00
parent c7868579c0
commit 5706c7a93b
1 changed files with 12 additions and 1 deletions
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13
src/math/dd/dd_bdd.cpp
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@ -994,6 +994,18 @@ namespace dd {
bdd bdd_manager::mk_uge(bddv const& a, bddv const& b) { return mk_ule(b, a); }
bdd bdd_manager::mk_ult(bddv const& a, bddv const& b) { return mk_ule(a, b) && !mk_eq(a, b); }
bdd bdd_manager::mk_ugt(bddv const& a, bddv const& b) { return mk_ult(b, a); }
bdd_manager::bddv bdd_manager::mk_add(bddv const& a, bddv const& b) {
SASSERT(a.size() == b.size());
bdd carry = mk_false();
bddv result;
for (unsigned i = 0; i < a.size(); ++i) {
carry = (carry && a[i]) || (carry && b[i]) || (a[i] && b[i]);
result.push_back(carry ^ a[i] ^ b[i]);
}
return result;
}
#if 0
bdd bdd_manager::mk_sle(bddv const& a, bddv const& b);
bdd bdd_manager::mk_sge(bddv const& a, bddv const& b) { return mk_sle(b, a); }
@ -1004,7 +1016,6 @@ namespace dd {
bdd_manager::bddv bdd_manager::mk_zero(unsigned num_bits);
bdd_manager::bddv bdd_manager::mk_var(unsigned num_bits, unsigned const* vars);
bdd_manager::bddv bdd_manager::mk_var(unsigned_vector const& vars);
bdd_manager::bddv bdd_manager::mk_add(bddv const& a, bddv const& b);
bdd_manager::bddv bdd_manager::mk_sub(bddv const& a, bddv const& b);
bdd_manager::bddv bdd_manager::mk_mul(bddv const& a, bddv const& b);
bdd_manager::bddv bdd_manager::mk_mul(bddv const& a, bool_vector const& b);