Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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_INTERPRETER_ASSEMBLER_H_ |
| 6 | #define V8_COMPILER_INTERPRETER_ASSEMBLER_H_ |
| 7 | |
| 8 | // Clients of this interface shouldn't depend on lots of compiler internals. |
| 9 | // Do not include anything from src/compiler here! |
| 10 | #include "src/allocation.h" |
| 11 | #include "src/base/smart-pointers.h" |
| 12 | #include "src/builtins.h" |
| 13 | #include "src/frames.h" |
| 14 | #include "src/interpreter/bytecodes.h" |
| 15 | #include "src/runtime/runtime.h" |
| 16 | |
| 17 | namespace v8 { |
| 18 | namespace internal { |
| 19 | |
| 20 | class CallInterfaceDescriptor; |
| 21 | class Isolate; |
| 22 | class Zone; |
| 23 | |
| 24 | namespace compiler { |
| 25 | |
| 26 | class CallDescriptor; |
| 27 | class Graph; |
| 28 | class Node; |
| 29 | class Operator; |
| 30 | class RawMachineAssembler; |
| 31 | class Schedule; |
| 32 | |
| 33 | class InterpreterAssembler { |
| 34 | public: |
| 35 | InterpreterAssembler(Isolate* isolate, Zone* zone, |
| 36 | interpreter::Bytecode bytecode); |
| 37 | virtual ~InterpreterAssembler(); |
| 38 | |
| 39 | Handle<Code> GenerateCode(); |
| 40 | |
| 41 | // Returns the count immediate for bytecode operand |operand_index| in the |
| 42 | // current bytecode. |
| 43 | Node* BytecodeOperandCount(int operand_index); |
| 44 | // Returns the index immediate for bytecode operand |operand_index| in the |
| 45 | // current bytecode. |
| 46 | Node* BytecodeOperandIdx(int operand_index); |
| 47 | // Returns the Imm8 immediate for bytecode operand |operand_index| in the |
| 48 | // current bytecode. |
| 49 | Node* BytecodeOperandImm(int operand_index); |
| 50 | // Returns the register index for bytecode operand |operand_index| in the |
| 51 | // current bytecode. |
| 52 | Node* BytecodeOperandReg(int operand_index); |
| 53 | |
| 54 | // Accumulator. |
| 55 | Node* GetAccumulator(); |
| 56 | void SetAccumulator(Node* value); |
| 57 | |
| 58 | // Context. |
| 59 | Node* GetContext(); |
| 60 | void SetContext(Node* value); |
| 61 | |
| 62 | // Loads from and stores to the interpreter register file. |
| 63 | Node* LoadRegister(int offset); |
| 64 | Node* LoadRegister(interpreter::Register reg); |
| 65 | Node* LoadRegister(Node* reg_index); |
| 66 | Node* StoreRegister(Node* value, int offset); |
| 67 | Node* StoreRegister(Node* value, interpreter::Register reg); |
| 68 | Node* StoreRegister(Node* value, Node* reg_index); |
| 69 | |
| 70 | // Returns the next consecutive register. |
| 71 | Node* NextRegister(Node* reg_index); |
| 72 | |
| 73 | // Returns the location in memory of the register |reg_index| in the |
| 74 | // interpreter register file. |
| 75 | Node* RegisterLocation(Node* reg_index); |
| 76 | |
| 77 | // Constants. |
| 78 | Node* Int32Constant(int value); |
| 79 | Node* IntPtrConstant(intptr_t value); |
| 80 | Node* NumberConstant(double value); |
| 81 | Node* HeapConstant(Handle<HeapObject> object); |
| 82 | Node* BooleanConstant(bool value); |
| 83 | |
| 84 | // Tag and untag Smi values. |
| 85 | Node* SmiTag(Node* value); |
| 86 | Node* SmiUntag(Node* value); |
| 87 | |
| 88 | // Basic arithmetic operations. |
| 89 | Node* IntPtrAdd(Node* a, Node* b); |
| 90 | Node* IntPtrSub(Node* a, Node* b); |
| 91 | Node* WordShl(Node* value, int shift); |
| 92 | |
| 93 | // Load constant at |index| in the constant pool. |
| 94 | Node* LoadConstantPoolEntry(Node* index); |
| 95 | |
| 96 | // Load an element from a fixed array on the heap. |
| 97 | Node* LoadFixedArrayElement(Node* fixed_array, int index); |
| 98 | |
| 99 | // Load a field from an object on the heap. |
| 100 | Node* LoadObjectField(Node* object, int offset); |
| 101 | |
| 102 | // Load |slot_index| from |context|. |
| 103 | Node* LoadContextSlot(Node* context, int slot_index); |
| 104 | Node* LoadContextSlot(Node* context, Node* slot_index); |
| 105 | // Stores |value| into |slot_index| of |context|. |
| 106 | Node* StoreContextSlot(Node* context, Node* slot_index, Node* value); |
| 107 | |
| 108 | // Load the TypeFeedbackVector for the current function. |
| 109 | Node* LoadTypeFeedbackVector(); |
| 110 | |
| 111 | // Project the output value at index |index| |
| 112 | Node* Projection(int index, Node* node); |
| 113 | |
| 114 | // Call constructor |constructor| with |arg_count| arguments (not |
| 115 | // including receiver) and the first argument located at |
| 116 | // |first_arg|. The |new_target| is the same as the |
| 117 | // |constructor| for the new keyword, but differs for the super |
| 118 | // keyword. |
| 119 | Node* CallConstruct(Node* new_target, Node* constructor, Node* first_arg, |
| 120 | Node* arg_count); |
| 121 | |
| 122 | // Call JSFunction or Callable |function| with |arg_count| |
| 123 | // arguments (not including receiver) and the first argument |
| 124 | // located at |first_arg|. |
| 125 | Node* CallJS(Node* function, Node* first_arg, Node* arg_count); |
| 126 | |
| 127 | // Call an IC code stub. |
| 128 | Node* CallIC(CallInterfaceDescriptor descriptor, Node* target, Node* arg1, |
| 129 | Node* arg2, Node* arg3); |
| 130 | Node* CallIC(CallInterfaceDescriptor descriptor, Node* target, Node* arg1, |
| 131 | Node* arg2, Node* arg3, Node* arg4); |
| 132 | Node* CallIC(CallInterfaceDescriptor descriptor, Node* target, Node* arg1, |
| 133 | Node* arg2, Node* arg3, Node* arg4, Node* arg5); |
| 134 | |
| 135 | // Call runtime function. |
| 136 | Node* CallRuntime(Node* function_id, Node* first_arg, Node* arg_count, |
| 137 | int return_size = 1); |
| 138 | Node* CallRuntime(Runtime::FunctionId function_id, Node* arg1); |
| 139 | Node* CallRuntime(Runtime::FunctionId function_id, Node* arg1, Node* arg2); |
| 140 | Node* CallRuntime(Runtime::FunctionId function_id, Node* arg1, Node* arg2, |
| 141 | Node* arg3, Node* arg4); |
| 142 | |
| 143 | // Jump relative to the current bytecode by |jump_offset|. |
| 144 | void Jump(Node* jump_offset); |
| 145 | |
| 146 | // Jump relative to the current bytecode by |jump_offset| if the |
| 147 | // word values |lhs| and |rhs| are equal. |
| 148 | void JumpIfWordEqual(Node* lhs, Node* rhs, Node* jump_offset); |
| 149 | |
| 150 | // Returns from the function. |
| 151 | void Return(); |
| 152 | |
| 153 | // Dispatch to the bytecode. |
| 154 | void Dispatch(); |
| 155 | |
| 156 | // Abort with the given bailout reason. |
| 157 | void Abort(BailoutReason bailout_reason); |
| 158 | |
| 159 | protected: |
| 160 | static bool TargetSupportsUnalignedAccess(); |
| 161 | |
| 162 | // Protected helpers (for testing) which delegate to RawMachineAssembler. |
| 163 | CallDescriptor* call_descriptor() const; |
| 164 | Graph* graph(); |
| 165 | |
| 166 | private: |
| 167 | // Returns a raw pointer to start of the register file on the stack. |
| 168 | Node* RegisterFileRawPointer(); |
| 169 | // Returns a tagged pointer to the current function's BytecodeArray object. |
| 170 | Node* BytecodeArrayTaggedPointer(); |
| 171 | // Returns the offset from the BytecodeArrayPointer of the current bytecode. |
| 172 | Node* BytecodeOffset(); |
| 173 | // Returns a raw pointer to first entry in the interpreter dispatch table. |
| 174 | Node* DispatchTableRawPointer(); |
| 175 | |
| 176 | // Saves and restores interpreter bytecode offset to the interpreter stack |
| 177 | // frame when performing a call. |
| 178 | void CallPrologue(); |
| 179 | void CallEpilogue(); |
| 180 | |
| 181 | // Returns the offset of register |index| relative to RegisterFilePointer(). |
| 182 | Node* RegisterFrameOffset(Node* index); |
| 183 | |
| 184 | Node* SmiShiftBitsConstant(); |
| 185 | Node* BytecodeOperand(int operand_index); |
| 186 | Node* BytecodeOperandSignExtended(int operand_index); |
| 187 | Node* BytecodeOperandShort(int operand_index); |
| 188 | Node* BytecodeOperandShortSignExtended(int operand_index); |
| 189 | |
| 190 | Node* CallN(CallDescriptor* descriptor, Node* code_target, Node** args); |
| 191 | Node* CallIC(CallInterfaceDescriptor descriptor, Node* target, Node** args); |
| 192 | |
| 193 | // Returns BytecodeOffset() advanced by delta bytecodes. Note: this does not |
| 194 | // update BytecodeOffset() itself. |
| 195 | Node* Advance(int delta); |
| 196 | Node* Advance(Node* delta); |
| 197 | |
| 198 | // Starts next instruction dispatch at |new_bytecode_offset|. |
| 199 | void DispatchTo(Node* new_bytecode_offset); |
| 200 | |
| 201 | // Abort operations for debug code. |
| 202 | void AbortIfWordNotEqual(Node* lhs, Node* rhs, BailoutReason bailout_reason); |
| 203 | |
| 204 | // Private helpers which delegate to RawMachineAssembler. |
| 205 | Isolate* isolate(); |
| 206 | Zone* zone(); |
| 207 | |
| 208 | interpreter::Bytecode bytecode_; |
| 209 | base::SmartPointer<RawMachineAssembler> raw_assembler_; |
| 210 | |
| 211 | Node* accumulator_; |
| 212 | Node* bytecode_offset_; |
| 213 | Node* context_; |
| 214 | |
| 215 | bool code_generated_; |
| 216 | |
| 217 | DISALLOW_COPY_AND_ASSIGN(InterpreterAssembler); |
| 218 | }; |
| 219 | |
| 220 | } // namespace compiler |
| 221 | } // namespace internal |
| 222 | } // namespace v8 |
| 223 | |
| 224 | #endif // V8_COMPILER_INTERPRETER_ASSEMBLER_H_ |