| // Copyright 2022 The Tint Authors. |
| // |
| // 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 SRC_TINT_CONSTANT_SPLAT_H_ |
| #define SRC_TINT_CONSTANT_SPLAT_H_ |
| |
| #include "src/tint/castable.h" |
| #include "src/tint/constant/composite.h" |
| #include "src/tint/type/type.h" |
| #include "src/tint/utils/vector.h" |
| |
| namespace tint::constant { |
| |
| /// Splat holds a single value, duplicated as all children. |
| /// |
| /// Splat is used for zero-initializers, 'splat' initializers, or initializers where each element is |
| /// identical. Splat may be of a vector, matrix, array or structure type. |
| class Splat : public Castable<Splat, Value> { |
| public: |
| /// Constructor |
| /// @param t the splat type |
| /// @param e the splat element |
| /// @param n the number of items in the splat |
| Splat(const type::Type* t, const Value* e, size_t n); |
| ~Splat() override; |
| |
| /// @returns the type of the splat |
| const type::Type* Type() const override { return type; } |
| |
| /// Retrieve item at index @p i |
| /// @param i the index to retrieve |
| /// @returns the element, or nullptr if out of bounds |
| const Value* Index(size_t i) const override { return i < count ? el : nullptr; } |
| |
| /// @copydoc Value::NumElements() |
| size_t NumElements() const override { return count; } |
| |
| /// @returns true if the element is zero |
| bool AllZero() const override { return el->AllZero(); } |
| /// @returns true if the element is zero |
| bool AnyZero() const override { return el->AnyZero(); } |
| |
| /// @returns the hash for the splat |
| size_t Hash() const override { return utils::Hash(type, el->Hash(), count); } |
| |
| /// Clones the constant into the provided context |
| /// @param ctx the clone context |
| /// @returns the cloned node |
| Splat* Clone(CloneContext& ctx) const override; |
| |
| /// The type of the splat element |
| type::Type const* const type; |
| /// The element stored in the splat |
| const Value* el; |
| /// The number of items in the splat |
| const size_t count; |
| |
| protected: |
| /// @returns a monostate variant. |
| std::variant<std::monostate, AInt, AFloat> InternalValue() const override { return {}; } |
| }; |
| |
| } // namespace tint::constant |
| |
| #endif // SRC_TINT_CONSTANT_SPLAT_H_ |