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add special handling of lshr, ashr

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This commit is contained in:
Nikolaj Bjorner 2024-04-02 21:08:59 -07:00
parent 918ac2b176
commit 2ce202db75
5 changed files with 376 additions and 27 deletions
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20
src/ast/sls/sls_valuation.h
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@ -60,13 +60,27 @@ namespace bv {
return bw;
}
void set_zero() {
for (unsigned i = 0; i < nw; ++i)
(*this)[i] = 0;
}
bvect& set_shift_right(bvect const& a, bvect const& b);
bvect& set_shift_right(bvect const& a, unsigned shift);
bvect& set_shift_left(bvect const& a, bvect const& b);
rational get_value(unsigned nw) const;
unsigned to_nat(unsigned max_n) const;
friend bool operator==(bvect const& a, bvect const& b);
friend bool operator<(bvect const& a, bvect const& b);
friend bool operator>(bvect const& a, bvect const& b);
friend bool operator<=(bvect const& a, bvect const& b);
friend bool operator>=(bvect const& a, bvect const& b);
friend bool operator<=(digit_t a, bvect const& b);
friend bool operator<=(bvect const& a, digit_t b);
friend std::ostream& operator<<(std::ostream& out, bvect const& v);
private:
@ -198,6 +212,8 @@ namespace bv {
// most significant bit or bw if src = 0
unsigned msb(bvect const& src) const;
unsigned clz(bvect const& src) const;
bool is_power_of2(bvect const& src) const;
// retrieve largest number at or below (above) src which is feasible
@ -232,7 +248,7 @@ namespace bv {
clear_overflow_bits(eval);
}
void set_zero(bvect& out) const {
void set_zero(bvect& out) const {
for (unsigned i = 0; i < nw; ++i)
out[i] = 0;
}
@ -288,7 +304,7 @@ namespace bv {
dst[i] = src[i];
}
unsigned to_nat(unsigned max_n);
unsigned to_nat(unsigned max_n) const;
std::ostream& display(std::ostream& out) const {
out << m_bits;