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This commit is contained in:
Nikolaj Bjorner 2024-02-14 16:59:52 +07:00
parent bd323d6fab
commit 1cf008dd0a
4 changed files with 219 additions and 33 deletions
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29
src/ast/sls/sls_valuation.h
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@ -54,6 +54,23 @@ namespace bv {
return 0 > memcmp(a.data(), b.data(), num_bytes());
}
bool is_zero() const { return is_zero(bits); }
bool is_zero(svector<digit_t> const& a) const {
for (unsigned i = 0; i < nw; ++i)
if (a[i] != 0)
return false;
return true;
}
bool sign() const { return get(bits, bw - 1); }
bool has_overflow(svector<digit_t> const& bits) const {
for (unsigned i = bw; i < nw * sizeof(digit_t) * 8; ++i)
if (get(bits, i))
return true;
return false;
}
unsigned parity(svector<digit_t> const& bits) const {
unsigned i = 0;
for (; i < bw && !get(bits, i); ++i);
@ -73,16 +90,28 @@ namespace bv {
clear_overflow_bits(bits);
}
void set_fixed(svector<digit_t> const& src) {
for (unsigned i = nw; i-- > 0; )
fixed[i] = src[i];
}
void set_range(svector<digit_t>& dst, unsigned lo, unsigned hi, bool b) {
for (unsigned i = lo; i < hi; ++i)
set(dst, i, b);
}
void set(svector<digit_t>& d, unsigned bit_idx, bool val) const {
auto _val = static_cast<digit_t>(0 - static_cast<digit_t>(val));
get_bit_word(d, bit_idx) ^= (_val ^ get_bit_word(d, bit_idx)) & get_pos_mask(bit_idx);
}
void set(svector<digit_t>& dst, unsigned v) const {
dst[0] = v;
for (unsigned i = 1; i < nw; ++i)
dst[i] = 0;
}
bool get(svector<digit_t> const& d, unsigned bit_idx) const {
return (get_bit_word(d, bit_idx) & get_pos_mask(bit_idx)) != 0;
}