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// Copyright 2021 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_TRANSFORM_DECOMPOSE_MEMORY_ACCESS_H_
#define SRC_TINT_TRANSFORM_DECOMPOSE_MEMORY_ACCESS_H_
#include <string>
#include "src/tint/ast/internal_attribute.h"
#include "src/tint/transform/transform.h"
// Forward declarations
namespace tint {
class CloneContext;
} // namespace tint
namespace tint::transform {
/// DecomposeMemoryAccess is a transform used to replace storage and uniform buffer accesses with a
/// combination of load, store or atomic functions on primitive types.
class DecomposeMemoryAccess final : public Castable<DecomposeMemoryAccess, Transform> {
public:
/// Intrinsic is an InternalAttribute that's used to decorate a stub function so that the HLSL
/// transforms this into calls to
/// `[RW]ByteAddressBuffer.Load[N]()` or `[RW]ByteAddressBuffer.Store[N]()`,
/// with a possible cast.
class Intrinsic final : public Castable<Intrinsic, ast::InternalAttribute> {
public:
/// Intrinsic op
enum class Op {
kLoad,
kStore,
kAtomicLoad,
kAtomicStore,
kAtomicAdd,
kAtomicSub,
kAtomicMax,
kAtomicMin,
kAtomicAnd,
kAtomicOr,
kAtomicXor,
kAtomicExchange,
kAtomicCompareExchangeWeak,
};
/// Intrinsic data type
enum class DataType {
kU32,
kF32,
kI32,
kF16,
kVec2U32,
kVec2F32,
kVec2I32,
kVec2F16,
kVec3U32,
kVec3F32,
kVec3I32,
kVec3F16,
kVec4U32,
kVec4F32,
kVec4I32,
kVec4F16,
};
/// Constructor
/// @param pid the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param o the op of the intrinsic
/// @param type the data type of the intrinsic
/// @param address_space the address space of the buffer
/// @param buffer the storage or uniform buffer identifier
Intrinsic(ProgramID pid,
ast::NodeID nid,
Op o,
DataType type,
builtin::AddressSpace address_space,
const ast::IdentifierExpression* buffer);
/// Destructor
~Intrinsic() override;
/// @return a short description of the internal attribute which will be
/// displayed as `@internal(<name>)`
std::string InternalName() const override;
/// Performs a deep clone of this object using the CloneContext `ctx`.
/// @param ctx the clone context
/// @return the newly cloned object
const Intrinsic* Clone(CloneContext* ctx) const override;
/// @return true if op is atomic
bool IsAtomic() const;
/// @return the buffer that this intrinsic operates on
const ast::IdentifierExpression* Buffer() const;
/// The op of the intrinsic
const Op op;
/// The type of the intrinsic
const DataType type;
/// The address space of the buffer this intrinsic operates on
const builtin::AddressSpace address_space;
};
/// Constructor
DecomposeMemoryAccess();
/// Destructor
~DecomposeMemoryAccess() override;
/// @copydoc Transform::Apply
ApplyResult Apply(const Program* program,
const DataMap& inputs,
DataMap& outputs) const override;
private:
struct State;
};
} // namespace tint::transform
#endif // SRC_TINT_TRANSFORM_DECOMPOSE_MEMORY_ACCESS_H_