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1 // Copyright 2015 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_INTERPRETER_BYTECODES_H_ | 5 #ifndef V8_INTERPRETER_BYTECODES_H_ |
6 #define V8_INTERPRETER_BYTECODES_H_ | 6 #define V8_INTERPRETER_BYTECODES_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 | 9 |
10 // Clients of this interface shouldn't depend on lots of interpreter internals. | 10 // Clients of this interface shouldn't depend on lots of interpreter internals. |
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69 BYTECODE_LIST(DECLARE_BYTECODE) | 69 BYTECODE_LIST(DECLARE_BYTECODE) |
70 #undef DECLARE_BYTECODE | 70 #undef DECLARE_BYTECODE |
71 #define COUNT_BYTECODE(x, ...) +1 | 71 #define COUNT_BYTECODE(x, ...) +1 |
72 // The COUNT_BYTECODE macro will turn this into kLast = -1 +1 +1... which will | 72 // The COUNT_BYTECODE macro will turn this into kLast = -1 +1 +1... which will |
73 // evaluate to the same value as the last real bytecode. | 73 // evaluate to the same value as the last real bytecode. |
74 kLast = -1 BYTECODE_LIST(COUNT_BYTECODE) | 74 kLast = -1 BYTECODE_LIST(COUNT_BYTECODE) |
75 #undef COUNT_BYTECODE | 75 #undef COUNT_BYTECODE |
76 }; | 76 }; |
77 | 77 |
78 | 78 |
| 79 // An interpreter register which is located in the function's register file |
| 80 // in its stack-frame. Register hold parameters, this, and expression values. |
| 81 class Register { |
| 82 public: |
| 83 static const int kMaxRegisterIndex = 127; |
| 84 static const int kMinRegisterIndex = -128; |
| 85 |
| 86 explicit Register(int index) : index_(index) { |
| 87 DCHECK_LE(index_, kMaxRegisterIndex); |
| 88 DCHECK_GE(index_, kMinRegisterIndex); |
| 89 } |
| 90 |
| 91 int index() const { return index_; } |
| 92 bool is_parameter() const { return index_ < 0; } |
| 93 |
| 94 static Register FromParameterIndex(int index, int parameter_count); |
| 95 int ToParameterIndex(int parameter_count) const; |
| 96 static int MaxParameterIndex(); |
| 97 |
| 98 static Register FromOperand(uint8_t operand); |
| 99 uint8_t ToOperand() const; |
| 100 |
| 101 private: |
| 102 void* operator new(size_t size); |
| 103 void operator delete(void* p); |
| 104 |
| 105 int index_; |
| 106 }; |
| 107 |
| 108 |
79 class Bytecodes { | 109 class Bytecodes { |
80 public: | 110 public: |
81 // Returns string representation of |bytecode|. | 111 // Returns string representation of |bytecode|. |
82 static const char* ToString(Bytecode bytecode); | 112 static const char* ToString(Bytecode bytecode); |
83 | 113 |
84 // Returns string representation of |operand_type|. | 114 // Returns string representation of |operand_type|. |
85 static const char* OperandTypeToString(OperandType operand_type); | 115 static const char* OperandTypeToString(OperandType operand_type); |
86 | 116 |
87 // Returns byte value of bytecode. | 117 // Returns byte value of bytecode. |
88 static uint8_t ToByte(Bytecode bytecode); | 118 static uint8_t ToByte(Bytecode bytecode); |
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99 // Returns the size of the bytecode including its operands. | 129 // Returns the size of the bytecode including its operands. |
100 static int Size(Bytecode bytecode); | 130 static int Size(Bytecode bytecode); |
101 | 131 |
102 // The maximum number of operands across all bytecodes. | 132 // The maximum number of operands across all bytecodes. |
103 static int MaximumNumberOfOperands(); | 133 static int MaximumNumberOfOperands(); |
104 | 134 |
105 // Maximum size of a bytecode and its operands. | 135 // Maximum size of a bytecode and its operands. |
106 static int MaximumSize(); | 136 static int MaximumSize(); |
107 | 137 |
108 // Decode a single bytecode and operands to |os|. | 138 // Decode a single bytecode and operands to |os|. |
109 static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start); | 139 static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start, |
| 140 int number_of_parameters); |
110 | 141 |
111 private: | 142 private: |
112 DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes); | 143 DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes); |
113 }; | 144 }; |
114 | 145 |
115 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode); | 146 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode); |
116 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type); | 147 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type); |
117 | 148 |
118 } // namespace interpreter | 149 } // namespace interpreter |
119 } // namespace internal | 150 } // namespace internal |
120 } // namespace v8 | 151 } // namespace v8 |
121 | 152 |
122 #endif // V8_INTERPRETER_BYTECODES_H_ | 153 #endif // V8_INTERPRETER_BYTECODES_H_ |
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