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working on pivot

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-04-20 17:42:01 -07:00
parent 80751bdd12
commit 36cd80748f
6 changed files with 74 additions and 55 deletions
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23
src/math/polysat/fixplex.h
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@ -18,6 +18,7 @@ Author:
#pragma once
#include <limits>
#include "math/simplex/sparse_matrix.h"
#include "util/heap.h"
#include "util/lbool.h"
@ -141,7 +142,7 @@ namespace polysat {
void update_and_pivot(var_t x_i, var_t x_j, numeral const& a_ij, numeral const& new_value) {}
void update_value(var_t v, numeral const& delta) {}
void update_value_core(var_t v, numeral const& delta) {}
void pivot(var_t x_i, var_t x_j, numeral const& a_ij) {}
void pivot(var_t x_i, var_t x_j, numeral a_ij);
void move_to_bound(var_t x, bool to_lower) {}
var_t select_pivot(var_t x_i, bool is_below, scoped_numeral& out_a_ij) { throw nullptr; }
var_t select_pivot_blands(var_t x_i, bool is_below, scoped_numeral& out_a_ij) { throw nullptr; }
@ -169,16 +170,24 @@ namespace polysat {
struct uint64_ext {
typedef uint64_t numeral;
static const uint64_t max_numeral = 0; // std::limits<uint64_t>::max();
struct manager {
typedef uint64_t numeral;
void reset() {}
void reset(numeral& n) {}
void reset(numeral& n) { n = 0; }
void del(numeral const& n) {}
bool is_zero(numeral const& n) const { return n == 0; }
bool is_one(numeral const& n) const { return n == 1; }
bool is_minus_one(numeral const& n) const { return max_numeral == n; }
void add(numeral const& a, numeral const& b, numeral& r) { r = a + b; }
void sub(numeral const& a, numeral const& b, numeral& r) { r = a - b; }
void mul(numeral const& a, numeral const& b, numeral& r) { r = a * b; }
void set(numeral& r, numeral const& a) { r = a; }
void neg(numeral& a) { a = 0 - a; }
numeral inv(numeral const& a) { return 0 - a; }
void swap(numeral& a, numeral& b) { std::swap(a, b); }
};
struct scoped_numeral {
scoped_numeral(manager& m) { n = 0; }
numeral n;
numeral& operator()() { return n; }
};
typedef _scoped_numeral<manager> scoped_numeral;
};
};