| // 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/diamond.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 { |
| kFloat64x2, |
| kFloat32x4, |
| kInt64x2, |
| 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 Float64ToInt64(Node** replacements, Node** result); |
| void Float32ToInt32(Node** replacements, Node** result); |
| void Int32ToFloat32(Node** replacements, Node** result); |
| void Int64ToFloat64(Node** replacements, Node** result); |
| void Int64ToInt32(Node** replacements, Node** result); |
| template <typename T> |
| void Int32ToSmallerInt(Node** replacements, Node** result); |
| template <typename T> |
| void SmallerIntToInt32(Node** replacements, Node** result); |
| void Int32ToInt64(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 LowerLoadTransformOp(Node* node, SimdType type); |
| void LowerStoreOp(Node* node); |
| void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op, |
| bool not_horizontal = true); |
| Node* ConstructPhiForComparison(Diamond d, SimdType rep_type, int true_value, |
| int false_value); |
| 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); |
| void LowerBitMaskOp(Node* node, SimdType rep_type, int msb_index); |
| void LowerAllTrueOp(Node* node, SimdType rep_type); |
| void LowerFloatPseudoMinMax(Node* node, const Operator* op, bool is_max, |
| SimdType type); |
| |
| 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_ |