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// Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef FORTRAN_EVALUATE_LOGICAL_H_
#define FORTRAN_EVALUATE_LOGICAL_H_
#include "integer.h"
#include <cinttypes>
namespace Fortran::evaluate::value {
template<int BITS> class Logical {
public:
static constexpr int bits{BITS};
constexpr Logical() {} // .FALSE.
constexpr Logical(const Logical &that) = default;
constexpr Logical(bool truth) : word_{-std::uint64_t{truth}} {}
constexpr Logical &operator=(const Logical &) = default;
// For static expression evaluation, all the bits will have the same value.
constexpr bool IsTrue() const { return word_.BTEST(0); }
constexpr Logical NOT() const { return {word_.NOT()}; }
constexpr Logical AND(const Logical &that) const {
return {word_.IAND(that.word_)};
}
constexpr Logical OR(const Logical &that) const {
return {word_.IOR(that.word_)};
}
constexpr Logical EQV(const Logical &that) const { return NEQV(that).NOT(); }
constexpr Logical NEQV(const Logical &that) const {
return {word_.IEOR(that.word_)};
}
private:
using Word = Integer<bits>;
constexpr Logical(const Word &w) : word_{w} {}
Word word_;
};
extern template class Logical<8>;
extern template class Logical<16>;
extern template class Logical<32>;
extern template class Logical<64>;
} // namespace Fortran::evaluate::value
#endif // FORTRAN_EVALUATE_LOGICAL_H_
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