mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-08-24 20:16:00 +00:00
Code Activity

hoist out fixed-bits reasoning into self-contained module

Browse source 
without dependencies on viable entries
This commit is contained in:
Nikolaj Bjorner 2023-12-25 10:59:27 -08:00
parent 658f079efd
commit b1072d0a1c
8 changed files with 183 additions and 158 deletions
Download patch file Download diff file Expand all files Collapse all files

34
src/sat/smt/polysat/fixed_bits.h
View file

@ -17,13 +17,33 @@ Author:
namespace polysat {
bool get_eq_fixed_lsb(pdd const& p, fixed_bits& out);
bool get_eq_fixed_bits(pdd const& p, fixed_bits& out);
class core;
bool get_ule_fixed_lsb(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_bits& out);
bool get_ule_fixed_msb(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_bits& out);
bool get_ule_fixed_bit(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_bits& out);
bool get_ule_fixed_bits(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_bits& out);
bool get_fixed_bits(signed_constraint c, fixed_bits& out);
bool get_eq_fixed_lsb(pdd const& p, fixed_slice& out);
bool get_eq_fixed_slice(pdd const& p, fixed_slice& out);
bool get_ule_fixed_lsb(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_slice& out);
bool get_ule_fixed_msb(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_slice& out);
bool get_ule_fixed_bit(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_slice& out);
bool get_ule_fixed_slice(pdd const& lhs, pdd const& rhs, bool is_positive, fixed_slice& out);
bool get_fixed_slice(signed_constraint c, fixed_slice& out);
class fixed_bits {
core& c;
pvar m_var = null_var;
vector<fixed_slice> m_fixed_slices;
svector<lbool> m_fixed;
bool_vector m_bits;
public:
fixed_bits(core& c) : c(c) {}
// reset with fixed bits information for variable v
void reset(pvar v);
// find then next value >= val that agrees with fixed bits, or false if none exists within the maximal value for val.
bool next(rational& val);
// explain the fixed bits ranges.
dependency_vector explain();
};
}