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/********************* */
/*! \file bitvector_optimizer.h
** \verbatim
** Top contributors (to current version):
** Yancheng Ou
** This file is part of the CVC4 project.
** Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Optimizer for BitVector type
**/
#ifndef CVC5__OMT__BITVECTOR_OPTIMIZER_H
#define CVC5__OMT__BITVECTOR_OPTIMIZER_H
#include "omt/omt_optimizer.h"
namespace cvc5::omt {
/**
* Optimizer for BitVector type
*/
class OMTOptimizerBitVector : public OMTOptimizer
{
public:
OMTOptimizerBitVector(bool isSigned);
virtual ~OMTOptimizerBitVector() = default;
std::pair<smt::OptResult, Node> minimize(SmtEngine* parentSMTSolver,
Node target) override;
std::pair<smt::OptResult, Node> maximize(SmtEngine* parentSMTSolver,
Node target) override;
private:
/**
* Computes the BitVector version of (a + b) / 2 without overflow,
* rounding towards -infinity: -1.5 --> -2 and 1.5 --> 1
* same as the rounding scheme for int32_t
**/
BitVector computeAverage(const BitVector& a,
const BitVector& b,
bool isSigned);
/** Is the BitVector doing signed comparison? **/
bool d_isSigned;
};
} // namespace cvc5::omt
#endif /* CVC5__OMT__BITVECTOR_OPTIMIZER_H */
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