35ad0036aa
Original-commit: flang-compiler/f18@fc470dc851 Reviewed-on: https://github.com/flang-compiler/f18/pull/144 Tree-same-pre-rewrite: false
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
// Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef FORTRAN_EVALUATE_LOGICAL_H_
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#define FORTRAN_EVALUATE_LOGICAL_H_
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#include "integer.h"
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#include <cinttypes>
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namespace Fortran::evaluate::value {
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template<int BITS> class Logical {
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public:
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static constexpr int bits{BITS};
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constexpr Logical() {} // .FALSE.
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constexpr Logical(const Logical &that) = default;
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constexpr Logical(bool truth) : word_{-std::uint64_t{truth}} {}
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constexpr Logical &operator=(const Logical &) = default;
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// For static expression evaluation, all the bits will have the same value.
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constexpr bool IsTrue() const { return word_.BTEST(0); }
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constexpr Logical NOT() const { return {word_.NOT()}; }
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constexpr Logical AND(const Logical &that) const {
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return {word_.IAND(that.word_)};
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}
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constexpr Logical OR(const Logical &that) const {
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return {word_.IOR(that.word_)};
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}
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constexpr Logical EQV(const Logical &that) const { return NEQV(that).NOT(); }
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constexpr Logical NEQV(const Logical &that) const {
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return {word_.IEOR(that.word_)};
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}
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private:
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using Word = Integer<bits>;
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constexpr Logical(const Word &w) : word_{w} {}
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Word word_;
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};
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extern template class Logical<8>;
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extern template class Logical<16>;
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extern template class Logical<32>;
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extern template class Logical<64>;
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extern template class Logical<128>;
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} // namespace Fortran::evaluate::value
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#endif // FORTRAN_EVALUATE_LOGICAL_H_
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