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| 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_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_ | |
| 6 #define V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_ | |
| 7 | |
| 8 #include "src/arm/assembler-arm.h" | |
| 9 #include "src/macro-assembler.h" | |
| 10 | |
| 11 namespace v8 { | |
| 12 namespace internal { | |
| 13 | |
| 14 | |
| 15 #ifndef V8_INTERPRETED_REGEXP | |
| 16 class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler { | |
| 17 public: | |
| 18 RegExpMacroAssemblerARM(Isolate* isolate, Zone* zone, Mode mode, | |
| 19 int registers_to_save); | |
| 20 virtual ~RegExpMacroAssemblerARM(); | |
| 21 virtual int stack_limit_slack(); | |
| 22 virtual void AdvanceCurrentPosition(int by); | |
| 23 virtual void AdvanceRegister(int reg, int by); | |
| 24 virtual void Backtrack(); | |
| 25 virtual void Bind(Label* label); | |
| 26 virtual void CheckAtStart(Label* on_at_start); | |
| 27 virtual void CheckCharacter(unsigned c, Label* on_equal); | |
| 28 virtual void CheckCharacterAfterAnd(unsigned c, | |
| 29 unsigned mask, | |
| 30 Label* on_equal); | |
| 31 virtual void CheckCharacterGT(uc16 limit, Label* on_greater); | |
| 32 virtual void CheckCharacterLT(uc16 limit, Label* on_less); | |
| 33 // A "greedy loop" is a loop that is both greedy and with a simple | |
| 34 // body. It has a particularly simple implementation. | |
| 35 virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); | |
| 36 virtual void CheckNotAtStart(Label* on_not_at_start); | |
| 37 virtual void CheckNotBackReference(int start_reg, Label* on_no_match); | |
| 38 virtual void CheckNotBackReferenceIgnoreCase(int start_reg, | |
| 39 Label* on_no_match); | |
| 40 virtual void CheckNotCharacter(unsigned c, Label* on_not_equal); | |
| 41 virtual void CheckNotCharacterAfterAnd(unsigned c, | |
| 42 unsigned mask, | |
| 43 Label* on_not_equal); | |
| 44 virtual void CheckNotCharacterAfterMinusAnd(uc16 c, | |
| 45 uc16 minus, | |
| 46 uc16 mask, | |
| 47 Label* on_not_equal); | |
| 48 virtual void CheckCharacterInRange(uc16 from, | |
| 49 uc16 to, | |
| 50 Label* on_in_range); | |
| 51 virtual void CheckCharacterNotInRange(uc16 from, | |
| 52 uc16 to, | |
| 53 Label* on_not_in_range); | |
| 54 virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set); | |
| 55 | |
| 56 // Checks whether the given offset from the current position is before | |
| 57 // the end of the string. | |
| 58 virtual void CheckPosition(int cp_offset, Label* on_outside_input); | |
| 59 virtual bool CheckSpecialCharacterClass(uc16 type, | |
| 60 Label* on_no_match); | |
| 61 virtual void Fail(); | |
| 62 virtual Handle<HeapObject> GetCode(Handle<String> source); | |
| 63 virtual void GoTo(Label* label); | |
| 64 virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); | |
| 65 virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); | |
| 66 virtual void IfRegisterEqPos(int reg, Label* if_eq); | |
| 67 virtual IrregexpImplementation Implementation(); | |
| 68 virtual void LoadCurrentCharacter(int cp_offset, | |
| 69 Label* on_end_of_input, | |
| 70 bool check_bounds = true, | |
| 71 int characters = 1); | |
| 72 virtual void PopCurrentPosition(); | |
| 73 virtual void PopRegister(int register_index); | |
| 74 virtual void PushBacktrack(Label* label); | |
| 75 virtual void PushCurrentPosition(); | |
| 76 virtual void PushRegister(int register_index, | |
| 77 StackCheckFlag check_stack_limit); | |
| 78 virtual void ReadCurrentPositionFromRegister(int reg); | |
| 79 virtual void ReadStackPointerFromRegister(int reg); | |
| 80 virtual void SetCurrentPositionFromEnd(int by); | |
| 81 virtual void SetRegister(int register_index, int to); | |
| 82 virtual bool Succeed(); | |
| 83 virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); | |
| 84 virtual void ClearRegisters(int reg_from, int reg_to); | |
| 85 virtual void WriteStackPointerToRegister(int reg); | |
| 86 virtual bool CanReadUnaligned(); | |
| 87 | |
| 88 // Called from RegExp if the stack-guard is triggered. | |
| 89 // If the code object is relocated, the return address is fixed before | |
| 90 // returning. | |
| 91 static int CheckStackGuardState(Address* return_address, | |
| 92 Code* re_code, | |
| 93 Address re_frame); | |
| 94 | |
| 95 private: | |
| 96 // Offsets from frame_pointer() of function parameters and stored registers. | |
| 97 static const int kFramePointer = 0; | |
| 98 | |
| 99 // Above the frame pointer - Stored registers and stack passed parameters. | |
| 100 // Register 4..11. | |
| 101 static const int kStoredRegisters = kFramePointer; | |
| 102 // Return address (stored from link register, read into pc on return). | |
| 103 static const int kReturnAddress = kStoredRegisters + 8 * kPointerSize; | |
| 104 static const int kSecondaryReturnAddress = kReturnAddress + kPointerSize; | |
| 105 // Stack parameters placed by caller. | |
| 106 static const int kRegisterOutput = kSecondaryReturnAddress + kPointerSize; | |
| 107 static const int kNumOutputRegisters = kRegisterOutput + kPointerSize; | |
| 108 static const int kStackHighEnd = kNumOutputRegisters + kPointerSize; | |
| 109 static const int kDirectCall = kStackHighEnd + kPointerSize; | |
| 110 static const int kIsolate = kDirectCall + kPointerSize; | |
| 111 | |
| 112 // Below the frame pointer. | |
| 113 // Register parameters stored by setup code. | |
| 114 static const int kInputEnd = kFramePointer - kPointerSize; | |
| 115 static const int kInputStart = kInputEnd - kPointerSize; | |
| 116 static const int kStartIndex = kInputStart - kPointerSize; | |
| 117 static const int kInputString = kStartIndex - kPointerSize; | |
| 118 // When adding local variables remember to push space for them in | |
| 119 // the frame in GetCode. | |
| 120 static const int kSuccessfulCaptures = kInputString - kPointerSize; | |
| 121 static const int kInputStartMinusOne = kSuccessfulCaptures - kPointerSize; | |
| 122 // First register address. Following registers are below it on the stack. | |
| 123 static const int kRegisterZero = kInputStartMinusOne - kPointerSize; | |
| 124 | |
| 125 // Initial size of code buffer. | |
| 126 static const size_t kRegExpCodeSize = 1024; | |
| 127 | |
| 128 static const int kBacktrackConstantPoolSize = 4; | |
| 129 | |
| 130 // Load a number of characters at the given offset from the | |
| 131 // current position, into the current-character register. | |
| 132 void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); | |
| 133 | |
| 134 // Check whether preemption has been requested. | |
| 135 void CheckPreemption(); | |
| 136 | |
| 137 // Check whether we are exceeding the stack limit on the backtrack stack. | |
| 138 void CheckStackLimit(); | |
| 139 | |
| 140 | |
| 141 // Generate a call to CheckStackGuardState. | |
| 142 void CallCheckStackGuardState(Register scratch); | |
| 143 | |
| 144 // The ebp-relative location of a regexp register. | |
| 145 MemOperand register_location(int register_index); | |
| 146 | |
| 147 // Register holding the current input position as negative offset from | |
| 148 // the end of the string. | |
| 149 inline Register current_input_offset() { return r6; } | |
| 150 | |
| 151 // The register containing the current character after LoadCurrentCharacter. | |
| 152 inline Register current_character() { return r7; } | |
| 153 | |
| 154 // Register holding address of the end of the input string. | |
| 155 inline Register end_of_input_address() { return r10; } | |
| 156 | |
| 157 // Register holding the frame address. Local variables, parameters and | |
| 158 // regexp registers are addressed relative to this. | |
| 159 inline Register frame_pointer() { return fp; } | |
| 160 | |
| 161 // The register containing the backtrack stack top. Provides a meaningful | |
| 162 // name to the register. | |
| 163 inline Register backtrack_stackpointer() { return r8; } | |
| 164 | |
| 165 // Register holding pointer to the current code object. | |
| 166 inline Register code_pointer() { return r5; } | |
| 167 | |
| 168 // Byte size of chars in the string to match (decided by the Mode argument) | |
| 169 inline int char_size() { return static_cast<int>(mode_); } | |
| 170 | |
| 171 // Equivalent to a conditional branch to the label, unless the label | |
| 172 // is NULL, in which case it is a conditional Backtrack. | |
| 173 void BranchOrBacktrack(Condition condition, Label* to); | |
| 174 | |
| 175 // Call and return internally in the generated code in a way that | |
| 176 // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) | |
| 177 inline void SafeCall(Label* to, Condition cond = al); | |
| 178 inline void SafeReturn(); | |
| 179 inline void SafeCallTarget(Label* name); | |
| 180 | |
| 181 // Pushes the value of a register on the backtrack stack. Decrements the | |
| 182 // stack pointer by a word size and stores the register's value there. | |
| 183 inline void Push(Register source); | |
| 184 | |
| 185 // Pops a value from the backtrack stack. Reads the word at the stack pointer | |
| 186 // and increments it by a word size. | |
| 187 inline void Pop(Register target); | |
| 188 | |
| 189 Isolate* isolate() const { return masm_->isolate(); } | |
| 190 | |
| 191 MacroAssembler* masm_; | |
| 192 | |
| 193 // Which mode to generate code for (Latin1 or UC16). | |
| 194 Mode mode_; | |
| 195 | |
| 196 // One greater than maximal register index actually used. | |
| 197 int num_registers_; | |
| 198 | |
| 199 // Number of registers to output at the end (the saved registers | |
| 200 // are always 0..num_saved_registers_-1) | |
| 201 int num_saved_registers_; | |
| 202 | |
| 203 // Labels used internally. | |
| 204 Label entry_label_; | |
| 205 Label start_label_; | |
| 206 Label success_label_; | |
| 207 Label backtrack_label_; | |
| 208 Label exit_label_; | |
| 209 Label check_preempt_label_; | |
| 210 Label stack_overflow_label_; | |
| 211 }; | |
| 212 | |
| 213 #endif // V8_INTERPRETED_REGEXP | |
| 214 | |
| 215 | |
| 216 }} // namespace v8::internal | |
| 217 | |
| 218 #endif // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_ | |
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Chromium Code Reviews
Issue 1285163003:
Move regexp implementation into its own folder. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master