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Diffstat (limited to 'src/3rdparty/v8/src/ia32/regexp-macro-assembler-ia32.h')
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1 files changed, 216 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/ia32/regexp-macro-assembler-ia32.h b/src/3rdparty/v8/src/ia32/regexp-macro-assembler-ia32.h new file mode 100644 index 0000000..0af61f2 --- /dev/null +++ b/src/3rdparty/v8/src/ia32/regexp-macro-assembler-ia32.h @@ -0,0 +1,216 @@ +// 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, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_ +#define V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_ + +namespace v8 { +namespace internal { + +#ifdef V8_INTERPRETED_REGEXP +class RegExpMacroAssemblerIA32: public RegExpMacroAssembler { + public: + RegExpMacroAssemblerIA32() { } + virtual ~RegExpMacroAssemblerIA32() { } +}; + +#else // V8_INTERPRETED_REGEXP +class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler { + public: + RegExpMacroAssemblerIA32(Mode mode, int registers_to_save); + virtual ~RegExpMacroAssemblerIA32(); + 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); + virtual void CheckCharacters(Vector<const uc16> str, + int cp_offset, + Label* on_failure, + bool check_end_of_string); + // 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(Label* on_not_at_start); + 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 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); + // 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<Object> 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 void Succeed(); + virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); + virtual void ClearRegisters(int reg_from, int reg_to); + virtual void WriteStackPointerToRegister(int reg); + + // 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 ebp of function parameters and stored registers. + static const int kFramePointer = 0; + // Above the frame pointer - function parameters and return address. + static const int kReturn_eip = kFramePointer + kPointerSize; + static const int kFrameAlign = kReturn_eip + kPointerSize; + // Parameters. + static const int kInputString = kFrameAlign; + static const int kStartIndex = kInputString + kPointerSize; + static const int kInputStart = kStartIndex + kPointerSize; + static const int kInputEnd = kInputStart + kPointerSize; + static const int kRegisterOutput = kInputEnd + kPointerSize; + static const int kStackHighEnd = kRegisterOutput + kPointerSize; + static const int kDirectCall = kStackHighEnd + kPointerSize; + static const int kIsolate = kDirectCall + kPointerSize; + // Below the frame pointer - local stack variables. + // When adding local variables remember to push space for them in + // the frame in GetCode. + static const int kBackup_esi = kFramePointer - kPointerSize; + static const int kBackup_edi = kBackup_esi - kPointerSize; + static const int kBackup_ebx = kBackup_edi - kPointerSize; + static const int kInputStartMinusOne = kBackup_ebx - kPointerSize; + // First register address. Following registers are below it on the stack. + static const int kRegisterZero = kInputStartMinusOne - 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. + Operand register_location(int register_index); + + // The register containing the current character after LoadCurrentCharacter. + inline Register current_character() { return edx; } + + // The register containing the backtrack stack top. Provides a meaningful + // name to the register. + inline Register backtrack_stackpointer() { return ecx; } + + // 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 NULL, in which case it is a conditional Backtrack. + void BranchOrBacktrack(Condition condition, Label* to, Hint hint = no_hint); + + // 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); + inline void SafeReturn(); + inline void SafeCallTarget(Label* name); + + // Pushes the value of a register on the backtrack stack. Decrements the + // stack pointer (ecx) by a word size and stores the register's value there. + inline void Push(Register source); + + // Pushes a value on the backtrack stack. Decrements the stack pointer (ecx) + // by a word size and stores the value there. + inline void Push(Immediate value); + + // Pops a value from the backtrack stack. Reads the word at the stack pointer + // (ecx) and increments it by a word size. + inline void Pop(Register target); + + MacroAssembler* masm_; + + // Which mode to generate code for (ASCII 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_; +}; +#endif // V8_INTERPRETED_REGEXP + +}} // namespace v8::internal + +#endif // V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_ |