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add stubs for shr

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This commit is contained in:
Nikolaj Bjorner 2021-12-14 14:35:08 -08:00
parent 934564882c
commit 06f7ba2e78
6 changed files with 176 additions and 5 deletions
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25
src/test/polysat.cpp
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@ -961,6 +961,24 @@ namespace polysat {
s.expect_sat();
}
static void test_quot_rem2(unsigned bw = 32) {
scoped_solver s(__func__);
s.set_max_conflicts(5);
auto q = s.var(s.add_var(bw));
auto r = s.var(s.add_var(bw));
auto idx = s.var(s.add_var(bw));
auto second = s.var(s.add_var(bw));
auto first = s.var(s.add_var(bw));
s.add_eq(q*idx + r, UINT_MAX);
s.add_ult(r, idx);
s.add_noovfl(q, idx);
s.add_ult(first, second);
s.add_diseq(idx, 0);
s.add_ule(second - first, q);
s.add_noovfl(second - first, idx);
s.check();
}
// Goal: we probably mix up polysat variables and PDD variables at several points; try to uncover such cases
// NOTE: actually, add_var seems to keep them in sync, so this is not an issue at the moment (but we should still test it later)
@ -1011,9 +1029,10 @@ namespace polysat {
auto pa = to_pdd(m, s, expr2pdd, a);
auto pb = to_pdd(m, s, expr2pdd, b);
s.add_eq(quot*pb + rem - pa);
s.add_ult(rem, pb);
// TODO:
// s.add_mul_noovfl(quot, pb);
s.add_ult(rem, pb);
s.add_noovfl(quot, pb);
// todo: add clause or use external iteration?
// s.add_clause(s.ult(rem, pb), s.eq(b));
r = alloc(pdd, quot);
}
else if (bv.is_numeral(e, n, sz))