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/****************************************************************************** |
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* Top contributors (to current version): |
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* Liana Hadarean, Aina Niemetz |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Bitvector theory. |
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*/ |
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#include "theory/bv/slicer.h" |
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#include <sstream> |
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#include "theory/bv/theory_bv_utils.h" |
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#include "theory/rewriter.h" |
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using namespace std; |
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namespace cvc5 { |
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namespace theory { |
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namespace bv { |
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/** |
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* Base |
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* |
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*/ |
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Base::Base(uint32_t size) |
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: d_size(size), |
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d_repr(size/32 + (size % 32 == 0? 0 : 1), 0) |
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{ |
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Assert(d_size > 0); |
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} |
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void Base::sliceAt(Index index) |
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{ |
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Index vector_index = index / 32; |
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if (vector_index == d_repr.size()) |
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return; |
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Index int_index = index % 32; |
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uint32_t bit_mask = 1u << int_index; |
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d_repr[vector_index] = d_repr[vector_index] | bit_mask; |
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} |
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bool Base::isCutPoint (Index index) const |
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{ |
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// there is an implicit cut point at the end and begining of the bv |
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if (index == d_size || index == 0) |
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return true; |
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Index vector_index = index / 32; |
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Assert(vector_index < d_size); |
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Index int_index = index % 32; |
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uint32_t bit_mask = 1u << int_index; |
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return (bit_mask & d_repr[vector_index]) != 0; |
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} |
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std::string Base::debugPrint() const { |
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std::ostringstream os; |
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os << "["; |
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bool first = true; |
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for (int i = d_size - 1; i >= 0; --i) { |
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if (isCutPoint(i)) { |
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if (first) |
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first = false; |
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else |
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os <<"| "; |
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os << i ; |
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} |
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} |
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os << "]"; |
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return os.str(); |
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} |
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} // namespace bv |
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} // namespace theory |
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} // namespace cvc5 |