94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
// Copyright 2022 The Tint Authors.
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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 SRC_TINT_CONSTANT_COMPOSITE_H_
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#define SRC_TINT_CONSTANT_COMPOSITE_H_
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#include "src/tint/constant/value.h"
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#include "src/tint/number.h"
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#include "src/tint/type/type.h"
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#include "src/tint/utils/castable.h"
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#include "src/tint/utils/hash.h"
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#include "src/tint/utils/vector.h"
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namespace tint::constant {
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/// Composite holds a number of mixed child values.
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/// Composite may be of a vector, matrix, array or structure type.
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/// If each element is the same type and value, then a Splat would be a more efficient constant
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/// implementation. Use CreateComposite() to create the appropriate type.
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class Composite : public utils::Castable<Composite, Value> {
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public:
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/// Constructor
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/// @param t the compsite type
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/// @param els the composite elements
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/// @param all_0 true if all elements are 0
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/// @param any_0 true if any element is 0
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Composite(const type::Type* t, utils::VectorRef<const Value*> els, bool all_0, bool any_0);
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~Composite() override;
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/// @copydoc Value::Type()
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const type::Type* Type() const override { return type; }
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/// @copydoc Value::Index()
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const Value* Index(size_t i) const override {
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return i < elements.Length() ? elements[i] : nullptr;
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}
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/// @copydoc Value::NumElements()
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size_t NumElements() const override { return elements.Length(); }
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/// @copydoc Value::AllZero()
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bool AllZero() const override { return all_zero; }
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/// @copydoc Value::AnyZero()
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bool AnyZero() const override { return any_zero; }
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/// @copydoc Value::Hash()
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size_t Hash() const override { return hash; }
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/// Clones the constant into the provided context
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/// @param ctx the clone context
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/// @returns the cloned node
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const Composite* Clone(CloneContext& ctx) const override;
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/// The composite type
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type::Type const* const type;
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/// The composite elements
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const utils::Vector<const Value*, 4> elements;
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/// True if all elements are zero
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const bool all_zero;
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/// True if any element is zero
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const bool any_zero;
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/// The hash of the composite
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const size_t hash;
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protected:
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/// @copydoc Value::InternalValue()
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std::variant<std::monostate, AInt, AFloat> InternalValue() const override { return {}; }
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private:
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size_t CalcHash() {
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auto h = utils::Hash(type, all_zero, any_zero);
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for (auto* el : elements) {
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h = utils::HashCombine(h, el->Hash());
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}
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return h;
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}
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};
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} // namespace tint::constant
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#endif // SRC_TINT_CONSTANT_COMPOSITE_H_
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