c49f7da3f2
Original-commit: flang-compiler/f18@ff124f69a9 Reviewed-on: https://github.com/flang-compiler/f18/pull/386 Tree-same-pre-rewrite: false
158 lines
5.1 KiB
C++
158 lines
5.1 KiB
C++
// Copyright (c) 2019, 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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#include "constant.h"
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#include "expression.h"
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#include "type.h"
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#include <string>
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namespace Fortran::evaluate {
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template<typename RESULT, typename VALUE>
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ConstantBase<RESULT, VALUE>::~ConstantBase() {}
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static std::int64_t SubscriptsToOffset(const std::vector<std::int64_t> &index,
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const std::vector<std::int64_t> &shape) {
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CHECK(index.size() == shape.size());
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std::int64_t stride{1}, offset{0};
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int dim{0};
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for (std::int64_t j : index) {
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std::int64_t bound{shape[dim++]};
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CHECK(j >= 1 && j <= bound);
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offset += stride * (j - 1);
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stride *= bound;
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}
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return offset;
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}
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template<typename RESULT, typename VALUE>
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auto ConstantBase<RESULT, VALUE>::At(
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const std::vector<std::int64_t> &index) const -> ScalarValue {
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return values_.at(SubscriptsToOffset(index, shape_));
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}
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template<typename RESULT, typename VALUE>
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auto ConstantBase<RESULT, VALUE>::At(std::vector<std::int64_t> &&index) const
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-> ScalarValue {
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return values_.at(SubscriptsToOffset(index, shape_));
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}
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static Constant<SubscriptInteger> ShapeAsConstant(
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const std::vector<std::int64_t> &shape) {
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using IntType = Scalar<SubscriptInteger>;
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std::vector<IntType> result;
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for (std::int64_t dim : shape) {
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result.emplace_back(dim);
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}
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return {std::move(result),
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std::vector<std::int64_t>{static_cast<std::int64_t>(shape.size())}};
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}
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template<typename RESULT, typename VALUE>
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Constant<SubscriptInteger> ConstantBase<RESULT, VALUE>::SHAPE() const {
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return ShapeAsConstant(shape_);
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}
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// Constant<Type<TypeCategory::Character, KIND> specializations
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template<int KIND>
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Constant<Type<TypeCategory::Character, KIND>>::Constant(const ScalarValue &str)
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: values_{str}, length_{static_cast<std::int64_t>(values_.size())} {}
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template<int KIND>
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Constant<Type<TypeCategory::Character, KIND>>::Constant(ScalarValue &&str)
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: values_{std::move(str)}, length_{
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static_cast<std::int64_t>(values_.size())} {}
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template<int KIND>
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Constant<Type<TypeCategory::Character, KIND>>::Constant(std::int64_t len,
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std::vector<ScalarValue> &&strings, std::vector<std::int64_t> &&dims)
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: length_{len}, shape_{std::move(dims)} {
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values_.assign(strings.size() * length_,
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static_cast<typename ScalarValue::value_type>(' '));
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std::int64_t at{0};
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for (const auto &str : strings) {
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auto strLen{static_cast<std::int64_t>(str.size())};
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if (strLen > length_) {
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values_.replace(at, length_, str.substr(0, length_));
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} else {
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values_.replace(at, strLen, str);
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}
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at += length_;
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}
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CHECK(at == static_cast<std::int64_t>(values_.size()));
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}
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template<int KIND> Constant<Type<TypeCategory::Character, KIND>>::~Constant() {}
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static std::int64_t ShapeElements(const std::vector<std::int64_t> &shape) {
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std::int64_t elements{1};
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for (auto dim : shape) {
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elements *= dim;
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}
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return elements;
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}
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template<int KIND>
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bool Constant<Type<TypeCategory::Character, KIND>>::empty() const {
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return size() == 0;
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}
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template<int KIND>
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std::size_t Constant<Type<TypeCategory::Character, KIND>>::size() const {
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if (length_ == 0) {
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return ShapeElements(shape_);
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} else {
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return static_cast<std::int64_t>(values_.size()) / length_;
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}
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}
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template<int KIND>
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auto Constant<Type<TypeCategory::Character, KIND>>::At(
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const std::vector<std::int64_t> &index) const -> ScalarValue {
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auto offset{SubscriptsToOffset(index, shape_)};
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return values_.substr(offset, length_);
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}
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template<int KIND>
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Constant<SubscriptInteger>
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Constant<Type<TypeCategory::Character, KIND>>::SHAPE() const {
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return ShapeAsConstant(shape_);
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}
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// Constant<SomeDerived> specialization
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Constant<SomeDerived>::Constant(const StructureConstructor &x)
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: Base{x.values()}, derivedTypeSpec_{&x.derivedTypeSpec()} {}
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Constant<SomeDerived>::Constant(StructureConstructor &&x)
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: Base{std::move(x.values())}, derivedTypeSpec_{&x.derivedTypeSpec()} {}
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Constant<SomeDerived>::Constant(const semantics::DerivedTypeSpec &spec,
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std::vector<StructureConstructorValues> &&x, std::vector<std::int64_t> &&s)
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: Base{std::move(x), std::move(s)}, derivedTypeSpec_{&spec} {}
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static std::vector<StructureConstructorValues> GetValues(
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std::vector<StructureConstructor> &&x) {
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std::vector<StructureConstructorValues> result;
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for (auto &&structure : std::move(x)) {
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result.emplace_back(std::move(structure.values()));
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}
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return result;
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}
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Constant<SomeDerived>::Constant(const semantics::DerivedTypeSpec &spec,
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std::vector<StructureConstructor> &&x, std::vector<std::int64_t> &&s)
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: Base{GetValues(std::move(x)), std::move(s)}, derivedTypeSpec_{&spec} {}
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INSTANTIATE_CONSTANT_TEMPLATES
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}
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