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/js-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             : namespace compiler {
      18             : 
      19             : class SimdScalarLowering {
      20             :  public:
      21             :   SimdScalarLowering(JSGraph* jsgraph,
      22             :                      Signature<MachineRepresentation>* signature);
      23             : 
      24             :   void LowerGraph();
      25             : 
      26             :   int GetParameterCountAfterLowering();
      27             : 
      28             :  private:
      29             :   enum class State : uint8_t { kUnvisited, kOnStack, kVisited };
      30             : 
      31             :   enum class SimdType : uint8_t { kFloat32x4, kInt32x4, kInt16x8, kInt8x16 };
      32             : 
      33             : #if defined(V8_TARGET_BIG_ENDIAN)
      34             :   static constexpr int kLaneOffsets[16] = {15, 14, 13, 12, 11, 10, 9, 8,
      35             :                                            7,  6,  5,  4,  3,  2,  1, 0};
      36             : #else
      37             :   static constexpr int kLaneOffsets[16] = {0, 1, 2,  3,  4,  5,  6,  7,
      38             :                                            8, 9, 10, 11, 12, 13, 14, 15};
      39             : #endif
      40             :   struct Replacement {
      41             :     Node** node = nullptr;
      42             :     SimdType type;  // represents output type
      43             :     int num_replacements = 0;
      44             :   };
      45             : 
      46             :   struct NodeState {
      47             :     Node* node;
      48             :     int input_index;
      49             :   };
      50             : 
      51             :   Zone* zone() const { return jsgraph_->zone(); }
      52       16386 :   Graph* graph() const { return jsgraph_->graph(); }
      53        6960 :   MachineOperatorBuilder* machine() const { return jsgraph_->machine(); }
      54        4278 :   CommonOperatorBuilder* common() const { return jsgraph_->common(); }
      55             :   Signature<MachineRepresentation>* signature() const { return signature_; }
      56             : 
      57             :   void LowerNode(Node* node);
      58             :   bool DefaultLowering(Node* node);
      59             : 
      60             :   int NumLanes(SimdType type);
      61             :   void ReplaceNode(Node* old, Node** new_nodes, int count);
      62             :   bool HasReplacement(size_t index, Node* node);
      63             :   Node** GetReplacements(Node* node);
      64             :   int ReplacementCount(Node* node);
      65             :   void Float32ToInt32(Node** replacements, Node** result);
      66             :   void Int32ToFloat32(Node** replacements, Node** result);
      67             :   Node** GetReplacementsWithType(Node* node, SimdType type);
      68             :   SimdType ReplacementType(Node* node);
      69             :   void PreparePhiReplacement(Node* phi);
      70             :   void SetLoweredType(Node* node, Node* output);
      71             :   void GetIndexNodes(Node* index, Node** new_indices, SimdType type);
      72             :   void LowerLoadOp(MachineRepresentation rep, Node* node,
      73             :                    const Operator* load_op, SimdType type);
      74             :   void LowerStoreOp(MachineRepresentation rep, Node* node,
      75             :                     const Operator* store_op, SimdType rep_type);
      76             :   void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op);
      77             :   void LowerCompareOp(Node* node, SimdType input_rep_type, const Operator* op,
      78             :                       bool invert_inputs = false);
      79             :   Node* FixUpperBits(Node* input, int32_t shift);
      80             :   void LowerBinaryOpForSmallInt(Node* node, SimdType input_rep_type,
      81             :                                 const Operator* op);
      82             :   Node* Mask(Node* input, int32_t mask);
      83             :   void LowerSaturateBinaryOp(Node* node, SimdType input_rep_type,
      84             :                              const Operator* op, bool is_signed);
      85             :   void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
      86             :   void LowerIntMinMax(Node* node, const Operator* op, bool is_max,
      87             :                       SimdType type);
      88             :   void LowerConvertFromFloat(Node* node, bool is_signed);
      89             :   void LowerShiftOp(Node* node, SimdType type);
      90             :   Node* BuildF64Trunc(Node* input);
      91             :   void LowerNotEqual(Node* node, SimdType input_rep_type, const Operator* op);
      92             :   MachineType MachineTypeFrom(SimdType simdType);
      93             : 
      94             :   JSGraph* const jsgraph_;
      95             :   NodeMarker<State> state_;
      96             :   ZoneDeque<NodeState> stack_;
      97             :   Replacement* replacements_;
      98             :   Signature<MachineRepresentation>* signature_;
      99             :   Node* placeholder_;
     100             :   int parameter_count_after_lowering_;
     101             : };
     102             : 
     103             : }  // namespace compiler
     104             : }  // namespace internal
     105             : }  // namespace v8
     106             : 
     107             : #endif  // V8_COMPILER_SIMD_SCALAR_LOWERING_H_