| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_REGEXP_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_ |
| #define V8_REGEXP_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_ |
| |
| #include "src/macro-assembler.h" |
| #include "src/mips/assembler-mips.h" |
| #include "src/regexp/regexp-macro-assembler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #ifndef V8_INTERPRETED_REGEXP |
| class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler { |
| public: |
| RegExpMacroAssemblerMIPS(Isolate* isolate, Zone* zone, Mode mode, |
| int registers_to_save); |
| virtual ~RegExpMacroAssemblerMIPS(); |
| virtual int stack_limit_slack(); |
| virtual void AdvanceCurrentPosition(int by); |
| virtual void AdvanceRegister(int reg, int by); |
| virtual void Backtrack(); |
| virtual void Bind(Label* label); |
| virtual void CheckAtStart(Label* on_at_start); |
| 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); |
| // A "greedy loop" is a loop that is both greedy and with a simple |
| // body. It has a particularly simple implementation. |
| virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); |
| virtual void CheckNotAtStart(int cp_offset, Label* on_not_at_start); |
| virtual void CheckNotBackReference(int start_reg, bool read_backward, |
| Label* on_no_match); |
| virtual void CheckNotBackReferenceIgnoreCase(int start_reg, |
| bool read_backward, bool unicode, |
| Label* on_no_match); |
| 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 CheckCharacterInRange(uc16 from, |
| uc16 to, |
| Label* on_in_range); |
| virtual void CheckCharacterNotInRange(uc16 from, |
| uc16 to, |
| Label* on_not_in_range); |
| virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set); |
| |
| // Checks whether the given offset from the current position is before |
| // the end of the string. |
| virtual void CheckPosition(int cp_offset, Label* on_outside_input); |
| virtual bool CheckSpecialCharacterClass(uc16 type, |
| Label* on_no_match); |
| virtual void Fail(); |
| virtual Handle<HeapObject> GetCode(Handle<String> source); |
| virtual void GoTo(Label* label); |
| virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); |
| virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); |
| virtual void IfRegisterEqPos(int reg, Label* if_eq); |
| virtual IrregexpImplementation Implementation(); |
| virtual void LoadCurrentCharacter(int cp_offset, |
| Label* on_end_of_input, |
| bool check_bounds = true, |
| int characters = 1); |
| virtual void PopCurrentPosition(); |
| virtual void PopRegister(int register_index); |
| virtual void PushBacktrack(Label* label); |
| virtual void PushCurrentPosition(); |
| virtual void PushRegister(int register_index, |
| StackCheckFlag check_stack_limit); |
| virtual void ReadCurrentPositionFromRegister(int reg); |
| virtual void ReadStackPointerFromRegister(int reg); |
| virtual void SetCurrentPositionFromEnd(int by); |
| virtual void SetRegister(int register_index, int to); |
| virtual bool Succeed(); |
| virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); |
| virtual void ClearRegisters(int reg_from, int reg_to); |
| virtual void WriteStackPointerToRegister(int reg); |
| virtual bool CanReadUnaligned(); |
| |
| // Called from RegExp if the stack-guard is triggered. |
| // If the code object is relocated, the return address is fixed before |
| // returning. |
| static int CheckStackGuardState(Address* return_address, |
| Code* re_code, |
| Address re_frame); |
| |
| private: |
| // Offsets from frame_pointer() of function parameters and stored registers. |
| static const int kFramePointer = 0; |
| |
| // Above the frame pointer - Stored registers and stack passed parameters. |
| // Registers s0 to s7, fp, and ra. |
| static const int kStoredRegisters = kFramePointer; |
| // Return address (stored from link register, read into pc on return). |
| static const int kReturnAddress = kStoredRegisters + 9 * kPointerSize; |
| // Stack frame header. |
| static const int kStackFrameHeader = kReturnAddress; |
| // Stack parameters placed by caller. |
| static const int kRegisterOutput = kStackFrameHeader + 20; |
| static const int kNumOutputRegisters = kRegisterOutput + kPointerSize; |
| static const int kStackHighEnd = kNumOutputRegisters + kPointerSize; |
| static const int kDirectCall = kStackHighEnd + kPointerSize; |
| static const int kIsolate = kDirectCall + kPointerSize; |
| |
| // Below the frame pointer. |
| // Register parameters stored by setup code. |
| static const int kInputEnd = kFramePointer - kPointerSize; |
| static const int kInputStart = kInputEnd - kPointerSize; |
| static const int kStartIndex = kInputStart - kPointerSize; |
| static const int kInputString = kStartIndex - kPointerSize; |
| // When adding local variables remember to push space for them in |
| // the frame in GetCode. |
| static const int kSuccessfulCaptures = kInputString - kPointerSize; |
| static const int kStringStartMinusOne = kSuccessfulCaptures - kPointerSize; |
| // First register address. Following registers are below it on the stack. |
| static const int kRegisterZero = kStringStartMinusOne - kPointerSize; |
| |
| // Initial size of code buffer. |
| static const size_t kRegExpCodeSize = 1024; |
| |
| // Load a number of characters at the given offset from the |
| // current position, into the current-character register. |
| void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); |
| |
| // Check whether preemption has been requested. |
| void CheckPreemption(); |
| |
| // Check whether we are exceeding the stack limit on the backtrack stack. |
| void CheckStackLimit(); |
| |
| |
| // Generate a call to CheckStackGuardState. |
| void CallCheckStackGuardState(Register scratch); |
| |
| // The ebp-relative location of a regexp register. |
| MemOperand register_location(int register_index); |
| |
| // Register holding the current input position as negative offset from |
| // the end of the string. |
| inline Register current_input_offset() { return t2; } |
| |
| // The register containing the current character after LoadCurrentCharacter. |
| inline Register current_character() { return t3; } |
| |
| // Register holding address of the end of the input string. |
| inline Register end_of_input_address() { return t6; } |
| |
| // Register holding the frame address. Local variables, parameters and |
| // regexp registers are addressed relative to this. |
| inline Register frame_pointer() { return fp; } |
| |
| // The register containing the backtrack stack top. Provides a meaningful |
| // name to the register. |
| inline Register backtrack_stackpointer() { return t4; } |
| |
| // Register holding pointer to the current code object. |
| inline Register code_pointer() { return t1; } |
| |
| // Byte size of chars in the string to match (decided by the Mode argument). |
| inline int char_size() { return static_cast<int>(mode_); } |
| |
| // Equivalent to a conditional branch to the label, unless the label |
| // is nullptr, in which case it is a conditional Backtrack. |
| void BranchOrBacktrack(Label* to, |
| Condition condition, |
| Register rs, |
| const Operand& rt); |
| |
| // Call and return internally in the generated code in a way that |
| // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) |
| inline void SafeCall(Label* to, |
| Condition cond, |
| Register rs, |
| const Operand& rt); |
| inline void SafeReturn(); |
| inline void SafeCallTarget(Label* name); |
| |
| // Pushes the value of a register on the backtrack stack. Decrements the |
| // stack pointer by a word size and stores the register's value there. |
| inline void Push(Register source); |
| |
| // Pops a value from the backtrack stack. Reads the word at the stack pointer |
| // and increments it by a word size. |
| inline void Pop(Register target); |
| |
| Isolate* isolate() const { return masm_->isolate(); } |
| |
| MacroAssembler* masm_; |
| |
| // Which mode to generate code for (Latin1 or UC16). |
| Mode mode_; |
| |
| // One greater than maximal register index actually used. |
| int num_registers_; |
| |
| // Number of registers to output at the end (the saved registers |
| // are always 0..num_saved_registers_-1). |
| int num_saved_registers_; |
| |
| // Labels used internally. |
| Label entry_label_; |
| Label start_label_; |
| Label success_label_; |
| Label backtrack_label_; |
| Label exit_label_; |
| Label check_preempt_label_; |
| Label stack_overflow_label_; |
| Label internal_failure_label_; |
| }; |
| |
| #endif // V8_INTERPRETED_REGEXP |
| |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_REGEXP_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_ |