1 // Copyright 2012 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.
5 #ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
6 #define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
8 #include "src/regexp-macro-assembler.h"
13 #ifdef V8_INTERPRETED_REGEXP
15 class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
17 // Create an assembler. Instructions and relocation information are emitted
18 // into a buffer, with the instructions starting from the beginning and the
19 // relocation information starting from the end of the buffer. See CodeDesc
20 // for a detailed comment on the layout (globals.h).
22 // If the provided buffer is NULL, the assembler allocates and grows its own
23 // buffer, and buffer_size determines the initial buffer size. The buffer is
24 // owned by the assembler and deallocated upon destruction of the assembler.
26 // If the provided buffer is not NULL, the assembler uses the provided buffer
27 // for code generation and assumes its size to be buffer_size. If the buffer
28 // is too small, a fatal error occurs. No deallocation of the buffer is done
29 // upon destruction of the assembler.
30 RegExpMacroAssemblerIrregexp(Vector<byte>, Zone* zone);
31 virtual ~RegExpMacroAssemblerIrregexp();
32 // The byte-code interpreter checks on each push anyway.
33 virtual int stack_limit_slack() { return 1; }
34 virtual bool CanReadUnaligned() { return false; }
35 virtual void Bind(Label* label);
36 virtual void AdvanceCurrentPosition(int by); // Signed cp change.
37 virtual void PopCurrentPosition();
38 virtual void PushCurrentPosition();
39 virtual void Backtrack();
40 virtual void GoTo(Label* label);
41 virtual void PushBacktrack(Label* label);
42 virtual bool Succeed();
44 virtual void PopRegister(int register_index);
45 virtual void PushRegister(int register_index,
46 StackCheckFlag check_stack_limit);
47 virtual void AdvanceRegister(int reg, int by); // r[reg] += by.
48 virtual void SetCurrentPositionFromEnd(int by);
49 virtual void SetRegister(int register_index, int to);
50 virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
51 virtual void ClearRegisters(int reg_from, int reg_to);
52 virtual void ReadCurrentPositionFromRegister(int reg);
53 virtual void WriteStackPointerToRegister(int reg);
54 virtual void ReadStackPointerFromRegister(int reg);
55 virtual void LoadCurrentCharacter(int cp_offset,
56 Label* on_end_of_input,
57 bool check_bounds = true,
59 virtual void CheckCharacter(unsigned c, Label* on_equal);
60 virtual void CheckCharacterAfterAnd(unsigned c,
63 virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
64 virtual void CheckCharacterLT(uc16 limit, Label* on_less);
65 virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
66 virtual void CheckAtStart(Label* on_at_start);
67 virtual void CheckNotAtStart(Label* on_not_at_start);
68 virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
69 virtual void CheckNotCharacterAfterAnd(unsigned c,
72 virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
76 virtual void CheckCharacterInRange(uc16 from,
79 virtual void CheckCharacterNotInRange(uc16 from,
81 Label* on_not_in_range);
82 virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set);
83 virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
84 virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
86 virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
87 virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
88 virtual void IfRegisterEqPos(int register_index, Label* if_eq);
90 virtual IrregexpImplementation Implementation();
91 virtual Handle<HeapObject> GetCode(Handle<String> source);
95 // Code and bitmap emission.
96 inline void EmitOrLink(Label* label);
97 inline void Emit32(uint32_t x);
98 inline void Emit16(uint32_t x);
99 inline void Emit8(uint32_t x);
100 inline void Emit(uint32_t bc, uint32_t arg);
103 void Copy(Address a);
105 // The buffer into which code and relocation info are generated.
106 Vector<byte> buffer_;
107 // The program counter.
109 // True if the assembler owns the buffer, false if buffer is external.
113 int advance_current_start_;
114 int advance_current_offset_;
115 int advance_current_end_;
119 static const int kInvalidPC = -1;
121 DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
124 #endif // V8_INTERPRETED_REGEXP
126 } } // namespace v8::internal
128 #endif // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_