| // Copyright 2008-2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |
| #define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |
| |
| namespace v8 { namespace internal { |
| |
| |
| class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler { |
| public: |
| // Create an assembler. Instructions and relocation information are emitted |
| // into a buffer, with the instructions starting from the beginning and the |
| // relocation information starting from the end of the buffer. See CodeDesc |
| // for a detailed comment on the layout (globals.h). |
| // |
| // If the provided buffer is NULL, the assembler allocates and grows its own |
| // buffer, and buffer_size determines the initial buffer size. The buffer is |
| // owned by the assembler and deallocated upon destruction of the assembler. |
| // |
| // If the provided buffer is not NULL, the assembler uses the provided buffer |
| // for code generation and assumes its size to be buffer_size. If the buffer |
| // is too small, a fatal error occurs. No deallocation of the buffer is done |
| // upon destruction of the assembler. |
| explicit RegExpMacroAssemblerIrregexp(Vector<byte>); |
| virtual ~RegExpMacroAssemblerIrregexp(); |
| // The byte-code interpreter checks on each push anyway. |
| virtual int stack_limit_slack() { return 1; } |
| virtual void Bind(Label* label); |
| virtual void EmitOrLink(Label* label); |
| virtual void AdvanceCurrentPosition(int by); // Signed cp change. |
| virtual void PopCurrentPosition(); |
| virtual void PushCurrentPosition(); |
| virtual void Backtrack(); |
| virtual void GoTo(Label* label); |
| virtual void PushBacktrack(Label* label); |
| virtual void Succeed(); |
| virtual void Fail(); |
| virtual void PopRegister(int register_index); |
| virtual void PushRegister(int register_index, |
| StackCheckFlag check_stack_limit); |
| virtual void AdvanceRegister(int reg, int by); // r[reg] += by. |
| virtual void SetRegister(int register_index, int to); |
| virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); |
| virtual void ClearRegisters(int reg_from, int reg_to); |
| virtual void ReadCurrentPositionFromRegister(int reg); |
| virtual void WriteStackPointerToRegister(int reg); |
| virtual void ReadStackPointerFromRegister(int reg); |
| virtual void LoadCurrentCharacter(int cp_offset, |
| Label* on_end_of_input, |
| bool check_bounds = true, |
| int characters = 1); |
| virtual void CheckCharacter(uint32_t c, Label* on_equal); |
| virtual void CheckCharacterAfterAnd(uint32_t c, |
| uint32_t mask, |
| Label* on_equal); |
| virtual void CheckCharacterGT(uc16 limit, Label* on_greater); |
| virtual void CheckCharacterLT(uc16 limit, Label* on_less); |
| virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); |
| virtual void CheckAtStart(Label* on_at_start); |
| virtual void CheckNotAtStart(Label* on_not_at_start); |
| virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal); |
| virtual void CheckNotCharacterAfterAnd(uint32_t c, |
| uint32_t mask, |
| Label* on_not_equal); |
| virtual void CheckNotCharacterAfterMinusAnd(uc16 c, |
| uc16 minus, |
| uc16 mask, |
| Label* on_not_equal); |
| virtual void CheckNotBackReference(int start_reg, Label* on_no_match); |
| virtual void CheckNotBackReferenceIgnoreCase(int start_reg, |
| Label* on_no_match); |
| virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal); |
| virtual void CheckCharacters(Vector<const uc16> str, |
| int cp_offset, |
| Label* on_failure, |
| bool check_end_of_string); |
| virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero); |
| virtual void DispatchHalfNibbleMap(uc16 start, |
| Label* half_nibble_map, |
| const Vector<Label*>& destinations); |
| virtual void DispatchByteMap(uc16 start, |
| Label* byte_map, |
| const Vector<Label*>& destinations); |
| virtual void DispatchHighByteMap(byte start, |
| Label* byte_map, |
| const Vector<Label*>& destinations); |
| virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt); |
| virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge); |
| virtual void IfRegisterEqPos(int register_index, Label* if_eq); |
| |
| virtual IrregexpImplementation Implementation(); |
| virtual Handle<Object> GetCode(Handle<String> source); |
| private: |
| void Expand(); |
| // Code and bitmap emission. |
| inline void Emit32(uint32_t x); |
| inline void Emit16(uint32_t x); |
| inline void Emit(uint32_t bc, uint32_t arg); |
| // Bytecode buffer. |
| int length(); |
| void Copy(Address a); |
| |
| // The buffer into which code and relocation info are generated. |
| Vector<byte> buffer_; |
| // The program counter. |
| int pc_; |
| // True if the assembler owns the buffer, false if buffer is external. |
| bool own_buffer_; |
| Label backtrack_; |
| |
| int advance_current_start_; |
| int advance_current_offset_; |
| int advance_current_end_; |
| |
| static const int kInvalidPC = -1; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp); |
| }; |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_ |