Line data    Source code

       1             : // Copyright 2016 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_COMPILER_SIMD_SCALAR_LOWERING_H_
       6             : #define V8_COMPILER_SIMD_SCALAR_LOWERING_H_
       7             : 
       8             : #include "src/compiler/common-operator.h"
       9             : #include "src/compiler/graph.h"
      10             : #include "src/compiler/machine-graph.h"
      11             : #include "src/compiler/machine-operator.h"
      12             : #include "src/compiler/node-marker.h"
      13             : #include "src/zone/zone-containers.h"
      14             : 
      15             : namespace v8 {
      16             : namespace internal {
      17             : 
      18             : template <typename T>
      19             : class Signature;
      20             : 
      21             : namespace compiler {
      22             : 
      23        4084 : class SimdScalarLowering {
      24             :  public:
      25             :   SimdScalarLowering(MachineGraph* mcgraph,
      26             :                      Signature<MachineRepresentation>* signature);
      27             : 
      28             :   void LowerGraph();
      29             : 
      30             :   int GetParameterCountAfterLowering();
      31             : 
      32             :  private:
      33             :   enum class State : uint8_t { kUnvisited, kOnStack, kVisited };
      34             : 
      35             :   enum class SimdType : uint8_t { kFloat32x4, kInt32x4, kInt16x8, kInt8x16 };
      36             : 
      37             : #if defined(V8_TARGET_BIG_ENDIAN)
      38             :   static constexpr int kLaneOffsets[16] = {15, 14, 13, 12, 11, 10, 9, 8,
      39             :                                            7,  6,  5,  4,  3,  2,  1, 0};
      40             : #else
      41             :   static constexpr int kLaneOffsets[16] = {0, 1, 2,  3,  4,  5,  6,  7,
      42             :                                            8, 9, 10, 11, 12, 13, 14, 15};
      43             : #endif
      44             :   struct Replacement {
      45             :     Node** node = nullptr;
      46             :     SimdType type;  // represents output type
      47             :     int num_replacements = 0;
      48             :   };
      49             : 
      50             :   struct NodeState {
      51             :     Node* node;
      52             :     int input_index;
      53             :   };
      54             : 
      55             :   Zone* zone() const { return mcgraph_->zone(); }
      56             :   Graph* graph() const { return mcgraph_->graph(); }
      57             :   MachineOperatorBuilder* machine() const { return mcgraph_->machine(); }
      58             :   CommonOperatorBuilder* common() const { return mcgraph_->common(); }
      59             :   Signature<MachineRepresentation>* signature() const { return signature_; }
      60             : 
      61             :   void LowerNode(Node* node);
      62             :   bool DefaultLowering(Node* node);
      63             : 
      64             :   int NumLanes(SimdType type);
      65             :   void ReplaceNode(Node* old, Node** new_nodes, int count);
      66             :   bool HasReplacement(size_t index, Node* node);
      67             :   Node** GetReplacements(Node* node);
      68             :   int ReplacementCount(Node* node);
      69             :   void Float32ToInt32(Node** replacements, Node** result);
      70             :   void Int32ToFloat32(Node** replacements, Node** result);
      71             :   template <typename T>
      72             :   void Int32ToSmallerInt(Node** replacements, Node** result);
      73             :   template <typename T>
      74             :   void SmallerIntToInt32(Node** replacements, Node** result);
      75             :   Node** GetReplacementsWithType(Node* node, SimdType type);
      76             :   SimdType ReplacementType(Node* node);
      77             :   void PreparePhiReplacement(Node* phi);
      78             :   void SetLoweredType(Node* node, Node* output);
      79             :   void GetIndexNodes(Node* index, Node** new_indices, SimdType type);
      80             :   void LowerLoadOp(Node* node, SimdType type);
      81             :   void LowerStoreOp(Node* node);
      82             :   void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op,
      83             :                      bool not_horizontal = true);
      84             :   void LowerCompareOp(Node* node, SimdType input_rep_type, const Operator* op,
      85             :                       bool invert_inputs = false);
      86             :   Node* FixUpperBits(Node* input, int32_t shift);
      87             :   void LowerBinaryOpForSmallInt(Node* node, SimdType input_rep_type,
      88             :                                 const Operator* op, bool not_horizontal = true);
      89             :   Node* Mask(Node* input, int32_t mask);
      90             :   void LowerSaturateBinaryOp(Node* node, SimdType input_rep_type,
      91             :                              const Operator* op, bool is_signed);
      92             :   void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
      93             :   void LowerIntMinMax(Node* node, const Operator* op, bool is_max,
      94             :                       SimdType type);
      95             :   void LowerConvertFromFloat(Node* node, bool is_signed);
      96             :   void LowerConvertFromInt(Node* node, SimdType input_rep_type,
      97             :                            SimdType output_rep_type, bool is_signed,
      98             :                            int start_index);
      99             :   void LowerPack(Node* node, SimdType input_rep_type, SimdType output_rep_type,
     100             :                  bool is_signed);
     101             :   void LowerShiftOp(Node* node, SimdType type);
     102             :   Node* BuildF64Trunc(Node* input);
     103             :   void LowerNotEqual(Node* node, SimdType input_rep_type, const Operator* op);
     104             :   MachineType MachineTypeFrom(SimdType simdType);
     105             : 
     106             :   MachineGraph* const mcgraph_;
     107             :   NodeMarker<State> state_;
     108             :   ZoneDeque<NodeState> stack_;
     109             :   Replacement* replacements_;
     110             :   Signature<MachineRepresentation>* signature_;
     111             :   Node* placeholder_;
     112             :   int parameter_count_after_lowering_;
     113             : };
     114             : 
     115             : }  // namespace compiler
     116             : }  // namespace internal
     117             : }  // namespace v8
     118             : 
     119             : #endif  // V8_COMPILER_SIMD_SCALAR_LOWERING_H_