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