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27
28#ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
29#define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
30
31namespace v8 {
32namespace internal {
33
34#ifdef V8_INTERPRETED_REGEXP
35
36class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
37 public:
38  // Create an assembler. Instructions and relocation information are emitted
39  // into a buffer, with the instructions starting from the beginning and the
40  // relocation information starting from the end of the buffer. See CodeDesc
41  // for a detailed comment on the layout (globals.h).
42  //
43  // If the provided buffer is NULL, the assembler allocates and grows its own
44  // buffer, and buffer_size determines the initial buffer size. The buffer is
45  // owned by the assembler and deallocated upon destruction of the assembler.
46  //
47  // If the provided buffer is not NULL, the assembler uses the provided buffer
48  // for code generation and assumes its size to be buffer_size. If the buffer
49  // is too small, a fatal error occurs. No deallocation of the buffer is done
50  // upon destruction of the assembler.
51  RegExpMacroAssemblerIrregexp(Vector<byte>, Zone* zone);
52  virtual ~RegExpMacroAssemblerIrregexp();
53  // The byte-code interpreter checks on each push anyway.
54  virtual int stack_limit_slack() { return 1; }
55  virtual void Bind(Label* label);
56  virtual void AdvanceCurrentPosition(int by);  // Signed cp change.
57  virtual void PopCurrentPosition();
58  virtual void PushCurrentPosition();
59  virtual void Backtrack();
60  virtual void GoTo(Label* label);
61  virtual void PushBacktrack(Label* label);
62  virtual bool Succeed();
63  virtual void Fail();
64  virtual void PopRegister(int register_index);
65  virtual void PushRegister(int register_index,
66                            StackCheckFlag check_stack_limit);
67  virtual void AdvanceRegister(int reg, int by);  // r[reg] += by.
68  virtual void SetCurrentPositionFromEnd(int by);
69  virtual void SetRegister(int register_index, int to);
70  virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
71  virtual void ClearRegisters(int reg_from, int reg_to);
72  virtual void ReadCurrentPositionFromRegister(int reg);
73  virtual void WriteStackPointerToRegister(int reg);
74  virtual void ReadStackPointerFromRegister(int reg);
75  virtual void LoadCurrentCharacter(int cp_offset,
76                                    Label* on_end_of_input,
77                                    bool check_bounds = true,
78                                    int characters = 1);
79  virtual void CheckCharacter(unsigned c, Label* on_equal);
80  virtual void CheckCharacterAfterAnd(unsigned c,
81                                      unsigned mask,
82                                      Label* on_equal);
83  virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
84  virtual void CheckCharacterLT(uc16 limit, Label* on_less);
85  virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
86  virtual void CheckAtStart(Label* on_at_start);
87  virtual void CheckNotAtStart(Label* on_not_at_start);
88  virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
89  virtual void CheckNotCharacterAfterAnd(unsigned c,
90                                         unsigned mask,
91                                         Label* on_not_equal);
92  virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
93                                              uc16 minus,
94                                              uc16 mask,
95                                              Label* on_not_equal);
96  virtual void CheckCharacterInRange(uc16 from,
97                                     uc16 to,
98                                     Label* on_in_range);
99  virtual void CheckCharacterNotInRange(uc16 from,
100                                        uc16 to,
101                                        Label* on_not_in_range);
102  virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
103  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
104  virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
105                                               Label* on_no_match);
106  virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
107  virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
108  virtual void IfRegisterEqPos(int register_index, Label* if_eq);
109
110  virtual IrregexpImplementation Implementation();
111  virtual Handle<HeapObject> GetCode(Handle<String> source);
112
113 private:
114  void Expand();
115  // Code and bitmap emission.
116  inline void EmitOrLink(Label* label);
117  inline void Emit32(uint32_t x);
118  inline void Emit16(uint32_t x);
119  inline void Emit8(uint32_t x);
120  inline void Emit(uint32_t bc, uint32_t arg);
121  // Bytecode buffer.
122  int length();
123  void Copy(Address a);
124
125  // The buffer into which code and relocation info are generated.
126  Vector<byte> buffer_;
127  // The program counter.
128  int pc_;
129  // True if the assembler owns the buffer, false if buffer is external.
130  bool own_buffer_;
131  Label backtrack_;
132
133  int advance_current_start_;
134  int advance_current_offset_;
135  int advance_current_end_;
136
137  Isolate* isolate_;
138
139  static const int kInvalidPC = -1;
140
141  DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
142};
143
144#endif  // V8_INTERPRETED_REGEXP
145
146} }  // namespace v8::internal
147
148#endif  // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
149