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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-04-14 22:03:28 -07:00
parent 034132d245
commit 9a2b7677bf
3 changed files with 20 additions and 9 deletions
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18
src/math/dd/dd_pdd.cpp
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@ -240,9 +240,8 @@ namespace dd {
break;
case pdd_subst_val_op:
while (!is_val(q) && !is_val(p)) {
if (level(p) == level(q)) break;
if (level(p) < level(q)) q = lo(q);
else p = lo(p);
else break;
}
if (is_val(p) || is_val(q)) return p;
break;
@ -388,12 +387,19 @@ namespace dd {
case pdd_subst_val_op:
SASSERT(!is_val(p));
SASSERT(!is_val(q));
SASSERT(level_p == level_q);
SASSERT(level_p >= level_q);
push(apply_rec(lo(p), q, pdd_subst_val_op)); // lo := subst(lo(p), s)
push(apply_rec(hi(p), q, pdd_subst_val_op)); // hi := subst(hi(p), s)
push(apply_rec(lo(q), read(1), pdd_mul_op)); // hi := hi*s[var(p)]
r = apply_rec(read(1), read(3), pdd_add_op); // r := hi + lo := subst(lo(p),s) + s[var(p)]*subst(hi(p),s)
npop = 3;
if (level_p > level_q) {
r = make_node(level_p, read(2), read(1));
npop = 2;
}
else {
push(apply_rec(lo(q), read(1), pdd_mul_op)); // hi := hi*s[var(p)]
r = apply_rec(read(1), read(3), pdd_add_op); // r := hi + lo := subst(lo(p),s) + s[var(p)]*subst(hi(p),s)
npop = 3;
}
break;
default:
r = null_pdd;