Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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. |
| 4 | |
| 5 | #ifndef V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |
| 6 | #define V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |
| 7 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 8 | #ifdef V8_INTERPRETED_REGEXP |
| 9 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 10 | #include "src/regexp/regexp-macro-assembler.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 15 | // A light-weight assembler for the Irregexp byte code. |
| 16 | class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler { |
| 17 | public: |
| 18 | // Create an assembler. Instructions and relocation information are emitted |
| 19 | // into a buffer, with the instructions starting from the beginning and the |
| 20 | // relocation information starting from the end of the buffer. See CodeDesc |
| 21 | // for a detailed comment on the layout (globals.h). |
| 22 | // |
| 23 | // If the provided buffer is NULL, the assembler allocates and grows its own |
| 24 | // buffer, and buffer_size determines the initial buffer size. The buffer is |
| 25 | // owned by the assembler and deallocated upon destruction of the assembler. |
| 26 | // |
| 27 | // If the provided buffer is not NULL, the assembler uses the provided buffer |
| 28 | // for code generation and assumes its size to be buffer_size. If the buffer |
| 29 | // is too small, a fatal error occurs. No deallocation of the buffer is done |
| 30 | // upon destruction of the assembler. |
| 31 | RegExpMacroAssemblerIrregexp(Isolate* isolate, Vector<byte> buffer, |
| 32 | Zone* zone); |
| 33 | virtual ~RegExpMacroAssemblerIrregexp(); |
| 34 | // The byte-code interpreter checks on each push anyway. |
| 35 | virtual int stack_limit_slack() { return 1; } |
| 36 | virtual bool CanReadUnaligned() { return false; } |
| 37 | virtual void Bind(Label* label); |
| 38 | virtual void AdvanceCurrentPosition(int by); // Signed cp change. |
| 39 | virtual void PopCurrentPosition(); |
| 40 | virtual void PushCurrentPosition(); |
| 41 | virtual void Backtrack(); |
| 42 | virtual void GoTo(Label* label); |
| 43 | virtual void PushBacktrack(Label* label); |
| 44 | virtual bool Succeed(); |
| 45 | virtual void Fail(); |
| 46 | virtual void PopRegister(int register_index); |
| 47 | virtual void PushRegister(int register_index, |
| 48 | StackCheckFlag check_stack_limit); |
| 49 | virtual void AdvanceRegister(int reg, int by); // r[reg] += by. |
| 50 | virtual void SetCurrentPositionFromEnd(int by); |
| 51 | virtual void SetRegister(int register_index, int to); |
| 52 | virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); |
| 53 | virtual void ClearRegisters(int reg_from, int reg_to); |
| 54 | virtual void ReadCurrentPositionFromRegister(int reg); |
| 55 | virtual void WriteStackPointerToRegister(int reg); |
| 56 | virtual void ReadStackPointerFromRegister(int reg); |
| 57 | virtual void LoadCurrentCharacter(int cp_offset, |
| 58 | Label* on_end_of_input, |
| 59 | bool check_bounds = true, |
| 60 | int characters = 1); |
| 61 | virtual void CheckCharacter(unsigned c, Label* on_equal); |
| 62 | virtual void CheckCharacterAfterAnd(unsigned c, |
| 63 | unsigned mask, |
| 64 | Label* on_equal); |
| 65 | virtual void CheckCharacterGT(uc16 limit, Label* on_greater); |
| 66 | virtual void CheckCharacterLT(uc16 limit, Label* on_less); |
| 67 | virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); |
| 68 | virtual void CheckAtStart(Label* on_at_start); |
| 69 | virtual void CheckNotAtStart(int cp_offset, Label* on_not_at_start); |
| 70 | virtual void CheckNotCharacter(unsigned c, Label* on_not_equal); |
| 71 | virtual void CheckNotCharacterAfterAnd(unsigned c, |
| 72 | unsigned mask, |
| 73 | Label* on_not_equal); |
| 74 | virtual void CheckNotCharacterAfterMinusAnd(uc16 c, |
| 75 | uc16 minus, |
| 76 | uc16 mask, |
| 77 | Label* on_not_equal); |
| 78 | virtual void CheckCharacterInRange(uc16 from, |
| 79 | uc16 to, |
| 80 | Label* on_in_range); |
| 81 | virtual void CheckCharacterNotInRange(uc16 from, |
| 82 | uc16 to, |
| 83 | Label* on_not_in_range); |
| 84 | virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set); |
| 85 | virtual void CheckNotBackReference(int start_reg, bool read_backward, |
| 86 | Label* on_no_match); |
| 87 | virtual void CheckNotBackReferenceIgnoreCase(int start_reg, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 88 | bool read_backward, bool unicode, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 89 | Label* on_no_match); |
| 90 | virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt); |
| 91 | virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge); |
| 92 | virtual void IfRegisterEqPos(int register_index, Label* if_eq); |
| 93 | |
| 94 | virtual IrregexpImplementation Implementation(); |
| 95 | virtual Handle<HeapObject> GetCode(Handle<String> source); |
| 96 | |
| 97 | private: |
| 98 | void Expand(); |
| 99 | // Code and bitmap emission. |
| 100 | inline void EmitOrLink(Label* label); |
| 101 | inline void Emit32(uint32_t x); |
| 102 | inline void Emit16(uint32_t x); |
| 103 | inline void Emit8(uint32_t x); |
| 104 | inline void Emit(uint32_t bc, uint32_t arg); |
| 105 | // Bytecode buffer. |
| 106 | int length(); |
| 107 | void Copy(Address a); |
| 108 | |
| 109 | // The buffer into which code and relocation info are generated. |
| 110 | Vector<byte> buffer_; |
| 111 | // The program counter. |
| 112 | int pc_; |
| 113 | // True if the assembler owns the buffer, false if buffer is external. |
| 114 | bool own_buffer_; |
| 115 | Label backtrack_; |
| 116 | |
| 117 | int advance_current_start_; |
| 118 | int advance_current_offset_; |
| 119 | int advance_current_end_; |
| 120 | |
| 121 | Isolate* isolate_; |
| 122 | |
| 123 | static const int kInvalidPC = -1; |
| 124 | |
| 125 | DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp); |
| 126 | }; |
| 127 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 128 | } // namespace internal |
| 129 | } // namespace v8 |
| 130 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 131 | #endif // V8_INTERPRETED_REGEXP |
| 132 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 133 | #endif // V8_REGEXP_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |