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28 #ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
29 #define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
34 #ifdef V8_INTERPRETED_REGEXP
36 class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
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).
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.
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 explicit RegExpMacroAssemblerIrregexp(Vector<byte>);
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 void Succeed();
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,
79 virtual void CheckCharacter(unsigned c, Label* on_equal);
80 virtual void CheckCharacterAfterAnd(unsigned c,
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,
92 virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
96 virtual void CheckCharacterInRange(uc16 from,
99 virtual void CheckCharacterNotInRange(uc16 from,
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,
106 virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal);
107 virtual void CheckCharacters(Vector<const uc16> str,
110 bool check_end_of_string);
111 virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
112 virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
113 virtual void IfRegisterEqPos(int register_index, Label* if_eq);
115 virtual IrregexpImplementation Implementation();
116 virtual Handle<HeapObject> GetCode(Handle<String> source);
120 // Code and bitmap emission.
121 inline void EmitOrLink(Label* label);
122 inline void Emit32(uint32_t x);
123 inline void Emit16(uint32_t x);
124 inline void Emit8(uint32_t x);
125 inline void Emit(uint32_t bc, uint32_t arg);
128 void Copy(Address a);
130 // The buffer into which code and relocation info are generated.
131 Vector<byte> buffer_;
132 // The program counter.
134 // True if the assembler owns the buffer, false if buffer is external.
138 int advance_current_start_;
139 int advance_current_offset_;
140 int advance_current_end_;
142 static const int kInvalidPC = -1;
144 DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
147 #endif // V8_INTERPRETED_REGEXP
149 } } // namespace v8::internal
151 #endif // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_