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add eval field to sls-valuation to track temporary values.

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This commit is contained in:
Nikolaj Bjorner 2024-02-26 14:54:15 -08:00
parent 8f139e862c
commit d774f07eb3
9 changed files with 339 additions and 336 deletions
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58
src/ast/sls/sls_valuation.cpp
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@ -56,15 +56,34 @@ namespace bv {
return mpn_manager().compare(a.data(), a.nw, b.data(), a.nw) >= 0;
}
std::ostream& operator<<(std::ostream& out, bvect const& v) {
out << std::hex;
bool nz = false;
for (unsigned i = v.nw; i-- > 0;) {
auto w = v[i];
if (i + 1 == v.nw)
w &= v.mask;
if (nz)
out << std::setw(8) << std::setfill('0') << w;
else if (w != 0)
out << w, nz = true;
}
if (!nz)
out << "0";
out << std::dec;
return out;
}
sls_valuation::sls_valuation(unsigned bw) {
set_bw(bw);
m_lo.set_bw(bw);
m_hi.set_bw(bw);
m_bits.set_bw(bw);
fixed.set_bw(bw);
eval.set_bw(bw);
// have lo, hi bits, fixed point to memory allocated within this of size num_bytes each allocated
for (unsigned i = 0; i < nw; ++i)
m_lo[i] = 0, m_hi[i] = 0, m_bits[i] = 0, fixed[i] = 0;
m_lo[i] = 0, m_hi[i] = 0, m_bits[i] = 0, fixed[i] = 0, eval[i] = 0;
fixed[nw - 1] = ~mask;
}
@ -76,6 +95,16 @@ namespace bv {
mask = ~(digit_t)0;
}
void sls_valuation::commit_eval() {
DEBUG_CODE(
for (unsigned i = 0; i < nw; ++i)
VERIFY(0 == (fixed[i] & (m_bits[i] ^ eval[i])));
);
for (unsigned i = 0; i < nw; ++i)
m_bits[i] = eval[i];
SASSERT(well_formed());
}
bool sls_valuation::in_range(bvect const& bits) const {
mpn_manager m;
auto c = m.compare(m_lo.data(), nw, m_hi.data(), nw);
@ -303,9 +332,7 @@ namespace bv {
if (!ok)
VERIFY(try_down ? round_up(dst) : round_down(dst));
DEBUG_CODE(SASSERT(0 == (mask & (fixed[nw-1] & (m_bits[nw-1] ^ dst[nw-1])))); for (unsigned i = 0; i + 1 < nw; ++i) SASSERT(0 == (fixed[i] & (m_bits[i] ^ dst[i]))););
if (m_bits == dst)
return false;
set(m_bits, dst);
set(eval, dst);
SASSERT(well_formed());
return true;
}
@ -452,8 +479,8 @@ namespace bv {
}
SASSERT(!has_overflow(m_lo));
SASSERT(!has_overflow(m_hi));
if (!in_range(m_bits))
set(m_bits, m_lo);
if (!in_range(eval))
set(eval, m_lo);
SASSERT(well_formed());
}
@ -518,7 +545,7 @@ namespace bv {
auto set_fixed_bit = [&](unsigned i, bool b) {
if (!fixed.get(i)) {
fixed.set(i, true);
m_bits.set(i, b);
eval.set(i, b);
}
};
@ -575,22 +602,5 @@ namespace bv {
return c == 1;
}
std::ostream& sls_valuation::print_bits(std::ostream& out, bvect const& v) const {
bool nz = false;
for (unsigned i = nw; i-- > 0;) {
auto w = v[i];
if (i + 1 == nw)
w &= mask;
if (nz)
out << std::setw(8) << std::setfill('0') << w;
else if (w != 0)
out << w, nz = true;
}
if (!nz)
out << "0";
return out;
}
}