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add built-in support for bvor: the rewriter converts bitwise and to bit-wise or so using bvor as a basis makes better sense

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-01-10 10:16:31 -08:00
parent e2c5d7d358
commit e7c9c5f7a2
10 changed files with 279 additions and 137 deletions
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14
src/sat/smt/polysat/saturation.cpp
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@ -51,6 +51,8 @@ namespace polysat {
resolve(v, inequality::from_ule(c, id));
else if (sc.is_umul_ovfl())
try_umul_ovfl(v, umul_ovfl(id, sc));
else if (sc.is_op())
try_op(v, sc, c.get_dependency(id));
return c.inconsistent();
}
@ -238,4 +240,16 @@ namespace polysat {
add_clause("ax + b = 0 & cx + d = 0 ==> cb - da = 0", { i.dep(), j.dep(), C.eq(r) }, true);
}
void saturation::try_op(pvar v, signed_constraint& sc, dependency const& d) {
verbose_stream() << "try op " << sc << "\n";
SASSERT(sc.is_op());
sc.propagate(c, l_true, d);
}
// possible algebraic rule:
// From "Hacker's Delight", section 2-2. Addition Combined with Logical Operations;
// found via Int-Blasting paper; see https://doi.org/10.1007/978-3-030-94583-1_24
// bor(p,q) = (p + q) - band(p, q);
}