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 { kInt32, kFloat32, kSimd1x4 };
      32             : 
      33             :   static const int kMaxLanes = 4;
      34             :   static const int kLaneWidth = 16 / kMaxLanes;
      35             : 
      36             :   struct Replacement {
      37             :     Node* node[kMaxLanes];
      38             :     SimdType type;  // represents what input type is expected
      39             :   };
      40             : 
      41             :   struct NodeState {
      42             :     Node* node;
      43             :     int input_index;
      44             :   };
      45             : 
      46             :   Zone* zone() const { return jsgraph_->zone(); }
      47           0 :   Graph* graph() const { return jsgraph_->graph(); }
      48           0 :   MachineOperatorBuilder* machine() const { return jsgraph_->machine(); }
      49           0 :   CommonOperatorBuilder* common() const { return jsgraph_->common(); }
      50             :   Signature<MachineRepresentation>* signature() const { return signature_; }
      51             : 
      52             :   void LowerNode(Node* node);
      53             :   bool DefaultLowering(Node* node);
      54             : 
      55             :   void ReplaceNode(Node* old, Node** new_nodes);
      56             :   bool HasReplacement(size_t index, Node* node);
      57             :   Node** GetReplacements(Node* node);
      58             :   Node** GetReplacementsWithType(Node* node, SimdType type);
      59             :   SimdType ReplacementType(Node* node);
      60             :   void PreparePhiReplacement(Node* phi);
      61             :   void SetLoweredType(Node* node, Node* output);
      62             :   void GetIndexNodes(Node* index, Node** new_indices);
      63             :   void LowerLoadOp(MachineRepresentation rep, Node* node,
      64             :                    const Operator* load_op);
      65             :   void LowerStoreOp(MachineRepresentation rep, Node* node,
      66             :                     const Operator* store_op, SimdType rep_type);
      67             :   void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op,
      68             :                      bool invert_inputs = false);
      69             :   void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
      70             :   void LowerIntMinMax(Node* node, const Operator* op, bool is_max);
      71             :   void LowerConvertFromFloat(Node* node, bool is_signed);
      72             :   void LowerShiftOp(Node* node, const Operator* op);
      73             :   Node* BuildF64Trunc(Node* input);
      74             :   void LowerNotEqual(Node* node, SimdType input_rep_type, const Operator* op);
      75             : 
      76             :   JSGraph* const jsgraph_;
      77             :   NodeMarker<State> state_;
      78             :   ZoneDeque<NodeState> stack_;
      79             :   Replacement* replacements_;
      80             :   Signature<MachineRepresentation>* signature_;
      81             :   Node* placeholder_;
      82             :   int parameter_count_after_lowering_;
      83             : };
      84             : 
      85             : }  // namespace compiler
      86             : }  // namespace internal
      87             : }  // namespace v8
      88             : 
      89             : #endif  // V8_COMPILER_SIMD_SCALAR_LOWERING_H_