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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_COMPILER_SIMD_SCALAR_LOWERING_H_
#define V8_COMPILER_SIMD_SCALAR_LOWERING_H_
#include "src/compiler/common-operator.h"
#include "src/compiler/graph.h"
#include "src/compiler/machine-graph.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-marker.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
template <typename T>
class Signature;
namespace compiler {
class SimdScalarLowering {
public:
SimdScalarLowering(MachineGraph* mcgraph,
Signature<MachineRepresentation>* signature);
void LowerGraph();
int GetParameterCountAfterLowering();
private:
enum class State : uint8_t { kUnvisited, kOnStack, kVisited };
enum class SimdType : uint8_t { kFloat32x4, kInt32x4, kInt16x8, kInt8x16 };
#if defined(V8_TARGET_BIG_ENDIAN)
static constexpr int kLaneOffsets[16] = {15, 14, 13, 12, 11, 10, 9, 8,
7, 6, 5, 4, 3, 2, 1, 0};
#else
static constexpr int kLaneOffsets[16] = {0, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15};
#endif
struct Replacement {
Node** node = nullptr;
SimdType type; // represents output type
int num_replacements = 0;
};
struct NodeState {
Node* node;
int input_index;
};
Zone* zone() const { return mcgraph_->zone(); }
Graph* graph() const { return mcgraph_->graph(); }
MachineOperatorBuilder* machine() const { return mcgraph_->machine(); }
CommonOperatorBuilder* common() const { return mcgraph_->common(); }
Signature<MachineRepresentation>* signature() const { return signature_; }
void LowerNode(Node* node);
bool DefaultLowering(Node* node);
int NumLanes(SimdType type);
void ReplaceNode(Node* old, Node** new_nodes, int count);
bool HasReplacement(size_t index, Node* node);
Node** GetReplacements(Node* node);
int ReplacementCount(Node* node);
void Float32ToInt32(Node** replacements, Node** result);
void Int32ToFloat32(Node** replacements, Node** result);
template <typename T>
void Int32ToSmallerInt(Node** replacements, Node** result);
template <typename T>
void SmallerIntToInt32(Node** replacements, Node** result);
Node** GetReplacementsWithType(Node* node, SimdType type);
SimdType ReplacementType(Node* node);
void PreparePhiReplacement(Node* phi);
void SetLoweredType(Node* node, Node* output);
void GetIndexNodes(Node* index, Node** new_indices, SimdType type);
void LowerLoadOp(Node* node, SimdType type);
void LowerStoreOp(Node* node);
void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op,
bool not_horizontal = true);
void LowerCompareOp(Node* node, SimdType input_rep_type, const Operator* op,
bool invert_inputs = false);
Node* FixUpperBits(Node* input, int32_t shift);
void LowerBinaryOpForSmallInt(Node* node, SimdType input_rep_type,
const Operator* op, bool not_horizontal = true);
Node* Mask(Node* input, int32_t mask);
void LowerSaturateBinaryOp(Node* node, SimdType input_rep_type,
const Operator* op, bool is_signed);
void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
void LowerIntMinMax(Node* node, const Operator* op, bool is_max,
SimdType type);
void LowerConvertFromFloat(Node* node, bool is_signed);
void LowerConvertFromInt(Node* node, SimdType input_rep_type,
SimdType output_rep_type, bool is_signed,
int start_index);
void LowerPack(Node* node, SimdType input_rep_type, SimdType output_rep_type,
bool is_signed);
void LowerShiftOp(Node* node, SimdType type);
Node* BuildF64Trunc(Node* input);
void LowerNotEqual(Node* node, SimdType input_rep_type, const Operator* op);
MachineType MachineTypeFrom(SimdType simdType);
MachineGraph* const mcgraph_;
NodeMarker<State> state_;
ZoneDeque<NodeState> stack_;
Replacement* replacements_;
Signature<MachineRepresentation>* signature_;
Node* placeholder_;
int parameter_count_after_lowering_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SIMD_SCALAR_LOWERING_H_
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