77 lines
2.6 KiB
C++
77 lines
2.6 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_SPLAT_H_
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#define SRC_TINT_CONSTANT_SPLAT_H_
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#include "src/tint/constant/composite.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/vector.h"
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namespace tint::constant {
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/// Splat holds a single value, duplicated as all children.
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///
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/// Splat is used for zero-initializers, 'splat' initializers, or initializers where each element is
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/// identical. Splat may be of a vector, matrix, array or structure type.
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class Splat : public utils::Castable<Splat, Value> {
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public:
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/// Constructor
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/// @param t the splat type
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/// @param e the splat element
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/// @param n the number of items in the splat
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Splat(const type::Type* t, const Value* e, size_t n);
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~Splat() override;
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/// @returns the type of the splat
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const type::Type* Type() const override { return type; }
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/// Retrieve item at index @p i
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/// @param i the index to retrieve
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/// @returns the element, or nullptr if out of bounds
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const Value* Index(size_t i) const override { return i < count ? el : nullptr; }
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/// @copydoc Value::NumElements()
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size_t NumElements() const override { return count; }
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/// @returns true if the element is zero
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bool AllZero() const override { return el->AllZero(); }
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/// @returns true if the element is zero
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bool AnyZero() const override { return el->AnyZero(); }
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/// @returns the hash for the splat
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size_t Hash() const override { return utils::Hash(type, el->Hash(), count); }
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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 Splat* Clone(CloneContext& ctx) const override;
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/// The type of the splat element
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type::Type const* const type;
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/// The element stored in the splat
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const Value* el;
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/// The number of items in the splat
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const size_t count;
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protected:
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/// @returns a monostate variant.
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std::variant<std::monostate, AInt, AFloat> InternalValue() const override { return {}; }
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};
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} // namespace tint::constant
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#endif // SRC_TINT_CONSTANT_SPLAT_H_
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