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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_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_ | |
| 6 #define V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_ | |
| 7 | |
| 8 #include "src/ia32/assembler-ia32.h" | |
| 9 #include "src/macro-assembler.h" | |
| 10 | |
| 11 namespace v8 { | |
| 12 namespace internal { | |
| 13 | |
| 14 #ifndef V8_INTERPRETED_REGEXP | |
| 15 class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler { | |
| 16 public: | |
| 17 RegExpMacroAssemblerIA32(Isolate* isolate, Zone* zone, Mode mode, | |
| 18 int registers_to_save); | |
| 19 virtual ~RegExpMacroAssemblerIA32(); | |
| 20 virtual int stack_limit_slack(); | |
| 21 virtual void AdvanceCurrentPosition(int by); | |
| 22 virtual void AdvanceRegister(int reg, int by); | |
| 23 virtual void Backtrack(); | |
| 24 virtual void Bind(Label* label); | |
| 25 virtual void CheckAtStart(Label* on_at_start); | |
| 26 virtual void CheckCharacter(uint32_t c, Label* on_equal); | |
| 27 virtual void CheckCharacterAfterAnd(uint32_t c, | |
| 28 uint32_t mask, | |
| 29 Label* on_equal); | |
| 30 virtual void CheckCharacterGT(uc16 limit, Label* on_greater); | |
| 31 virtual void CheckCharacterLT(uc16 limit, Label* on_less); | |
| 32 // A "greedy loop" is a loop that is both greedy and with a simple | |
| 33 // body. It has a particularly simple implementation. | |
| 34 virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); | |
| 35 virtual void CheckNotAtStart(Label* on_not_at_start); | |
| 36 virtual void CheckNotBackReference(int start_reg, Label* on_no_match); | |
| 37 virtual void CheckNotBackReferenceIgnoreCase(int start_reg, | |
| 38 Label* on_no_match); | |
| 39 virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal); | |
| 40 virtual void CheckNotCharacterAfterAnd(uint32_t c, | |
| 41 uint32_t mask, | |
| 42 Label* on_not_equal); | |
| 43 virtual void CheckNotCharacterAfterMinusAnd(uc16 c, | |
| 44 uc16 minus, | |
| 45 uc16 mask, | |
| 46 Label* on_not_equal); | |
| 47 virtual void CheckCharacterInRange(uc16 from, | |
| 48 uc16 to, | |
| 49 Label* on_in_range); | |
| 50 virtual void CheckCharacterNotInRange(uc16 from, | |
| 51 uc16 to, | |
| 52 Label* on_not_in_range); | |
| 53 virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set); | |
| 54 | |
| 55 // Checks whether the given offset from the current position is before | |
| 56 // the end of the string. | |
| 57 virtual void CheckPosition(int cp_offset, Label* on_outside_input); | |
| 58 virtual bool CheckSpecialCharacterClass(uc16 type, Label* on_no_match); | |
| 59 virtual void Fail(); | |
| 60 virtual Handle<HeapObject> GetCode(Handle<String> source); | |
| 61 virtual void GoTo(Label* label); | |
| 62 virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); | |
| 63 virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); | |
| 64 virtual void IfRegisterEqPos(int reg, Label* if_eq); | |
| 65 virtual IrregexpImplementation Implementation(); | |
| 66 virtual void LoadCurrentCharacter(int cp_offset, | |
| 67 Label* on_end_of_input, | |
| 68 bool check_bounds = true, | |
| 69 int characters = 1); | |
| 70 virtual void PopCurrentPosition(); | |
| 71 virtual void PopRegister(int register_index); | |
| 72 virtual void PushBacktrack(Label* label); | |
| 73 virtual void PushCurrentPosition(); | |
| 74 virtual void PushRegister(int register_index, | |
| 75 StackCheckFlag check_stack_limit); | |
| 76 virtual void ReadCurrentPositionFromRegister(int reg); | |
| 77 virtual void ReadStackPointerFromRegister(int reg); | |
| 78 virtual void SetCurrentPositionFromEnd(int by); | |
| 79 virtual void SetRegister(int register_index, int to); | |
| 80 virtual bool Succeed(); | |
| 81 virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); | |
| 82 virtual void ClearRegisters(int reg_from, int reg_to); | |
| 83 virtual void WriteStackPointerToRegister(int reg); | |
| 84 | |
| 85 // Called from RegExp if the stack-guard is triggered. | |
| 86 // If the code object is relocated, the return address is fixed before | |
| 87 // returning. | |
| 88 static int CheckStackGuardState(Address* return_address, | |
| 89 Code* re_code, | |
| 90 Address re_frame); | |
| 91 | |
| 92 private: | |
| 93 // Offsets from ebp of function parameters and stored registers. | |
| 94 static const int kFramePointer = 0; | |
| 95 // Above the frame pointer - function parameters and return address. | |
| 96 static const int kReturn_eip = kFramePointer + kPointerSize; | |
| 97 static const int kFrameAlign = kReturn_eip + kPointerSize; | |
| 98 // Parameters. | |
| 99 static const int kInputString = kFrameAlign; | |
| 100 static const int kStartIndex = kInputString + kPointerSize; | |
| 101 static const int kInputStart = kStartIndex + kPointerSize; | |
| 102 static const int kInputEnd = kInputStart + kPointerSize; | |
| 103 static const int kRegisterOutput = kInputEnd + kPointerSize; | |
| 104 // For the case of global regular expression, we have room to store at least | |
| 105 // one set of capture results. For the case of non-global regexp, we ignore | |
| 106 // this value. | |
| 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 // Below the frame pointer - local stack variables. | |
| 112 // When adding local variables remember to push space for them in | |
| 113 // the frame in GetCode. | |
| 114 static const int kBackup_esi = kFramePointer - kPointerSize; | |
| 115 static const int kBackup_edi = kBackup_esi - kPointerSize; | |
| 116 static const int kBackup_ebx = kBackup_edi - kPointerSize; | |
| 117 static const int kSuccessfulCaptures = kBackup_ebx - kPointerSize; | |
| 118 static const int kInputStartMinusOne = kSuccessfulCaptures - kPointerSize; | |
| 119 // First register address. Following registers are below it on the stack. | |
| 120 static const int kRegisterZero = kInputStartMinusOne - kPointerSize; | |
| 121 | |
| 122 // Initial size of code buffer. | |
| 123 static const size_t kRegExpCodeSize = 1024; | |
| 124 | |
| 125 // Load a number of characters at the given offset from the | |
| 126 // current position, into the current-character register. | |
| 127 void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); | |
| 128 | |
| 129 // Check whether preemption has been requested. | |
| 130 void CheckPreemption(); | |
| 131 | |
| 132 // Check whether we are exceeding the stack limit on the backtrack stack. | |
| 133 void CheckStackLimit(); | |
| 134 | |
| 135 // Generate a call to CheckStackGuardState. | |
| 136 void CallCheckStackGuardState(Register scratch); | |
| 137 | |
| 138 // The ebp-relative location of a regexp register. | |
| 139 Operand register_location(int register_index); | |
| 140 | |
| 141 // The register containing the current character after LoadCurrentCharacter. | |
| 142 inline Register current_character() { return edx; } | |
| 143 | |
| 144 // The register containing the backtrack stack top. Provides a meaningful | |
| 145 // name to the register. | |
| 146 inline Register backtrack_stackpointer() { return ecx; } | |
| 147 | |
| 148 // Byte size of chars in the string to match (decided by the Mode argument) | |
| 149 inline int char_size() { return static_cast<int>(mode_); } | |
| 150 | |
| 151 // Equivalent to a conditional branch to the label, unless the label | |
| 152 // is NULL, in which case it is a conditional Backtrack. | |
| 153 void BranchOrBacktrack(Condition condition, Label* to); | |
| 154 | |
| 155 // Call and return internally in the generated code in a way that | |
| 156 // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) | |
| 157 inline void SafeCall(Label* to); | |
| 158 inline void SafeReturn(); | |
| 159 inline void SafeCallTarget(Label* name); | |
| 160 | |
| 161 // Pushes the value of a register on the backtrack stack. Decrements the | |
| 162 // stack pointer (ecx) by a word size and stores the register's value there. | |
| 163 inline void Push(Register source); | |
| 164 | |
| 165 // Pushes a value on the backtrack stack. Decrements the stack pointer (ecx) | |
| 166 // by a word size and stores the value there. | |
| 167 inline void Push(Immediate value); | |
| 168 | |
| 169 // Pops a value from the backtrack stack. Reads the word at the stack pointer | |
| 170 // (ecx) and increments it by a word size. | |
| 171 inline void Pop(Register target); | |
| 172 | |
| 173 Isolate* isolate() const { return masm_->isolate(); } | |
| 174 | |
| 175 MacroAssembler* masm_; | |
| 176 | |
| 177 // Which mode to generate code for (LATIN1 or UC16). | |
| 178 Mode mode_; | |
| 179 | |
| 180 // One greater than maximal register index actually used. | |
| 181 int num_registers_; | |
| 182 | |
| 183 // Number of registers to output at the end (the saved registers | |
| 184 // are always 0..num_saved_registers_-1) | |
| 185 int num_saved_registers_; | |
| 186 | |
| 187 // Labels used internally. | |
| 188 Label entry_label_; | |
| 189 Label start_label_; | |
| 190 Label success_label_; | |
| 191 Label backtrack_label_; | |
| 192 Label exit_label_; | |
| 193 Label check_preempt_label_; | |
| 194 Label stack_overflow_label_; | |
| 195 }; | |
| 196 #endif // V8_INTERPRETED_REGEXP | |
| 197 | |
| 198 }} // namespace v8::internal | |
| 199 | |
| 200 #endif // V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_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