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https://github.com/Z3Prover/z3
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74e73f2b84
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63804c5296
5 changed files with 148 additions and 195 deletions
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@ -111,7 +111,7 @@ namespace bv {
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else if (bv.is_bit2bool(e, s, idx)) {
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auto& val = wval0(s);
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val.try_set_bit(idx, !sign);
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val.set(val.fixed, idx, true);
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val.fixed.set(idx, true);
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val.init_fixed();
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}
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}
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@ -222,7 +222,7 @@ namespace bv {
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auto& v = ev.wval0(e);
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if (all_of(*e, [&](expr* arg) { return ev.is_fixed0(arg); })) {
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for (unsigned i = 0; i < v.bw; ++i)
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v.set(v.fixed, i, true);
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v.fixed.set(i, true);
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ev.m_fixed.setx(e->get_id(), true, false);
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return;
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}
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@ -272,16 +272,16 @@ namespace bv {
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}
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bool pfixed = true;
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for (unsigned i = 0; i < v.bw; ++i) {
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if (pfixed && a.get(a.fixed, i) && b.get(b.fixed, i))
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v.set(v.fixed, i, true);
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else if (!pfixed && a.get(a.fixed, i) && b.get(b.fixed, i) &&
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if (pfixed && a.fixed.get(i) && b.fixed.get(i))
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v.fixed.set(i, true);
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else if (!pfixed && a.fixed.get(i) && b.fixed.get(i) &&
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!a.get_bit(i) && !b.get_bit(i)) {
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pfixed = true;
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v.set(v.fixed, i, false);
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v.fixed.set(i, false);
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}
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else {
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pfixed = false;
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v.set(v.fixed, i, false);
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v.fixed.set(i, false);
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}
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}
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@ -294,36 +294,36 @@ namespace bv {
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// i'th bit depends on bits j + k = i
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// if the first j, resp k bits are 0, the bits j + k are 0
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for (; j < v.bw; ++j)
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if (!a.get(a.fixed, j))
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if (!a.fixed.get(j))
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break;
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for (; k < v.bw; ++k)
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if (!b.get(b.fixed, k))
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if (!b.fixed.get(k))
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break;
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for (; zj < v.bw; ++zj)
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if (!a.get(a.fixed, zj) || a.get_bit(zj))
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if (!a.fixed.get(zj) || a.get_bit(zj))
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break;
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for (; zk < v.bw; ++zk)
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if (!b.get(b.fixed, zk) || b.get_bit(zk))
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if (!b.fixed.get(zk) || b.get_bit(zk))
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break;
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for (; hzj < v.bw; ++hzj)
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if (!a.get(a.fixed, v.bw - hzj - 1) || a.get_bit(v.bw - hzj - 1))
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if (!a.fixed.get(v.bw - hzj - 1) || a.get_bit(v.bw - hzj - 1))
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break;
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for (; hzk < v.bw; ++hzk)
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if (!b.get(b.fixed, v.bw - hzk - 1) || b.get_bit(v.bw - hzk - 1))
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if (!b.fixed.get(v.bw - hzk - 1) || b.get_bit(v.bw - hzk - 1))
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break;
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if (j > 0 && k > 0) {
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for (unsigned i = 0; i < std::min(k, j); ++i) {
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SASSERT(!v.get_bit(i));
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v.set(v.fixed, i, true);
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v.fixed.set(i, true);
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}
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}
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// lower zj + jk bits are 0
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if (zk > 0 || zj > 0) {
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for (unsigned i = 0; i < zk + zj; ++i) {
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SASSERT(!v.get_bit(i));
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v.set(v.fixed, i, true);
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v.fixed.set(i, true);
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}
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}
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// upper bits are 0, if enough high order bits of a, b are 0.
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@ -333,7 +333,7 @@ namespace bv {
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hzk = v.bw - hzk;
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for (unsigned i = hzj + hzk - 1; i < v.bw; ++i) {
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SASSERT(!v.get_bit(i));
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v.set(v.fixed, i, true);
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v.fixed.set(i, true);
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}
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}
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break;
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@ -342,9 +342,9 @@ namespace bv {
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auto& a = wval0(e->get_arg(0));
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auto& b = wval0(e->get_arg(1));
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for (unsigned i = 0; i < b.bw; ++i)
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v.set(v.fixed, i, b.get(b.fixed, i));
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v.fixed.set(i, b.fixed.get(i));
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for (unsigned i = 0; i < a.bw; ++i)
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v.set(v.fixed, i + b.bw, a.get(a.fixed, i));
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v.fixed.set(i + b.bw, a.fixed.get(i));
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break;
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}
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case OP_EXTRACT: {
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@ -353,18 +353,18 @@ namespace bv {
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VERIFY(bv.is_extract(e, lo, hi, child));
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auto& a = wval0(child);
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for (unsigned i = lo; i <= hi; ++i)
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v.set(v.fixed, i - lo, a.get(a.fixed, i));
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v.fixed.set(i - lo, a.fixed.get(i));
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break;
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}
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case OP_BNEG: {
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auto& a = wval0(e->get_arg(0));
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bool pfixed = true;
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for (unsigned i = 0; i < v.bw; ++i) {
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if (pfixed && a.get(a.fixed, i))
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v.set(v.fixed, i, true);
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if (pfixed && a.fixed.get(i))
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v.fixed.set(i, true);
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else {
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pfixed = false;
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v.set(v.fixed, i, false);
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v.fixed.set(i, false);
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}
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}
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break;
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