regexp-macro-assembler-x64.h revision a7e24c173cf37484693b9abb38e494fa7bd7baeb
1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2009 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifndef V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef V8_NATIVE_REGEXP 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockclass RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler { 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block public: 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RegExpMacroAssemblerX64(Mode mode, int registers_to_save); 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual ~RegExpMacroAssemblerX64(); 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual int stack_limit_slack(); 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void AdvanceCurrentPosition(int by); 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void AdvanceRegister(int reg, int by); 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void Backtrack(); 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void Bind(Label* label); 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckAtStart(Label* on_at_start); 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckCharacter(uint32_t c, Label* on_equal); 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckCharacterAfterAnd(uint32_t c, 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uint32_t mask, 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_equal); 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckCharacterGT(uc16 limit, Label* on_greater); 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckCharacterLT(uc16 limit, Label* on_less); 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckCharacters(Vector<const uc16> str, 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int cp_offset, 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_failure, 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool check_end_of_string); 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // A "greedy loop" is a loop that is both greedy and with a simple 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // body. It has a particularly simple implementation. 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotAtStart(Label* on_not_at_start); 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotBackReference(int start_reg, Label* on_no_match); 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotBackReferenceIgnoreCase(int start_reg, 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_no_match); 63a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal); 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal); 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotCharacterAfterAnd(uint32_t c, 66a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uint32_t mask, 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_not_equal); 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckNotCharacterAfterMinusAnd(uc16 c, 69a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uc16 minus, 70a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block uc16 mask, 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_not_equal); 72a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Checks whether the given offset from the current position is before 73a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the end of the string. 74a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void CheckPosition(int cp_offset, Label* on_outside_input); 75a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual bool CheckSpecialCharacterClass(uc16 type, 76a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int cp_offset, 77a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool check_offset, 78a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_no_match); 79a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void Fail(); 80a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual Handle<Object> GetCode(Handle<String> source); 81a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void GoTo(Label* label); 82a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); 83a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); 84a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void IfRegisterEqPos(int reg, Label* if_eq); 85a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual IrregexpImplementation Implementation(); 86a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void LoadCurrentCharacter(int cp_offset, 87a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* on_end_of_input, 88a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool check_bounds = true, 89a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int characters = 1); 90a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void PopCurrentPosition(); 91a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void PopRegister(int register_index); 92a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void PushBacktrack(Label* label); 93a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void PushCurrentPosition(); 94a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void PushRegister(int register_index, 95a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block StackCheckFlag check_stack_limit); 96a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void ReadCurrentPositionFromRegister(int reg); 97a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void ReadStackPointerFromRegister(int reg); 98a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void SetRegister(int register_index, int to); 99a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void Succeed(); 100a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); 101a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void ClearRegisters(int reg_from, int reg_to); 102a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block virtual void WriteStackPointerToRegister(int reg); 103a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 104a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static Result Match(Handle<Code> regexp, 105a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Handle<String> subject, 106a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int* offsets_vector, 107a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int offsets_vector_length, 108a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int previous_index); 109a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 110a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static Result Execute(Code* code, 111a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block String* input, 112a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int start_offset, 113a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const byte* input_start, 114a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const byte* input_end, 115a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int* output, 116a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool at_start); 117a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 118a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Called from RegExp if the stack-guard is triggered. 119a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If the code object is relocated, the return address is fixed before 120a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // returning. 121a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static int CheckStackGuardState(Address* return_address, 122a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Code* re_code, 123a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Address re_frame); 124a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 125a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block private: 126a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Offsets from rbp of function parameters and stored registers. 127a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kFramePointer = 0; 128a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Above the frame pointer - function parameters and return address. 129a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kReturn_eip = kFramePointer + kPointerSize; 130a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kFrameAlign = kReturn_eip + kPointerSize; 131a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 132a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef _WIN64 133a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Parameters (first four passed as registers, but with room on stack). 134a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // In Microsoft 64-bit Calling Convention, there is room on the callers 135a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // stack (before the return address) to spill parameter registers. We 136a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // use this space to store the register passed parameters. 137a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputString = kFrameAlign; 138a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // StartIndex is passed as 32 bit int. 139a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kStartIndex = kInputString + kPointerSize; 140a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputStart = kStartIndex + kPointerSize; 141a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputEnd = kInputStart + kPointerSize; 142a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kRegisterOutput = kInputEnd + kPointerSize; 143a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // AtStart is passed as 32 bit int (values 0 or 1). 144a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kAtStart = kRegisterOutput + kPointerSize; 145a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kStackHighEnd = kAtStart + kPointerSize; 146a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 147a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // In AMD64 ABI Calling Convention, the first six integer parameters 148a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // are passed as registers, and caller must allocate space on the stack 149a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // if it wants them stored. We push the parameters after the frame pointer. 150a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputString = kFramePointer - kPointerSize; 151a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kStartIndex = kInputString - kPointerSize; 152a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputStart = kStartIndex - kPointerSize; 153a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputEnd = kInputStart - kPointerSize; 154a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kRegisterOutput = kInputEnd - kPointerSize; 155a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kAtStart = kRegisterOutput - kPointerSize; 156a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kStackHighEnd = kFrameAlign; 157a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 158a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 159a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef _WIN64 160a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Microsoft calling convention has three callee-saved registers 161a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // (that we are using). We push these after the frame pointer. 162a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kBackup_rsi = kFramePointer - kPointerSize; 163a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kBackup_rdi = kBackup_rsi - kPointerSize; 164a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kBackup_rbx = kBackup_rdi - kPointerSize; 165a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kLastCalleeSaveRegister = kBackup_rbx; 166a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 167a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // AMD64 Calling Convention has only one callee-save register that 168a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // we use. We push this after the frame pointer (and after the 169a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // parameters). 170a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kBackup_rbx = kAtStart - kPointerSize; 171a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kLastCalleeSaveRegister = kBackup_rbx; 172a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 173a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 174a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // When adding local variables remember to push space for them in 175a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the frame in GetCode. 176a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kInputStartMinusOne = 177a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block kLastCalleeSaveRegister - kPointerSize; 178a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 179a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // First register address. Following registers are below it on the stack. 180a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const int kRegisterZero = kInputStartMinusOne - kPointerSize; 181a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 182a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Initial size of code buffer. 183a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block static const size_t kRegExpCodeSize = 1024; 184a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 185a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load a number of characters at the given offset from the 186a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // current position, into the current-character register. 187a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); 188a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 189a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check whether preemption has been requested. 190a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void CheckPreemption(); 191a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 192a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check whether we are exceeding the stack limit on the backtrack stack. 193a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void CheckStackLimit(); 194a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 195a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Generate a call to CheckStackGuardState. 196a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void CallCheckStackGuardState(); 197a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 198a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The rbp-relative location of a regexp register. 199a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Operand register_location(int register_index); 200a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 201a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The register containing the current character after LoadCurrentCharacter. 202a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline Register current_character() { return rdx; } 203a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 204a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The register containing the backtrack stack top. Provides a meaningful 205a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // name to the register. 206a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline Register backtrack_stackpointer() { return rcx; } 207a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 208a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The registers containing a self pointer to this code's Code object. 209a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline Register code_object_pointer() { return r8; } 210a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 211a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Byte size of chars in the string to match (decided by the Mode argument) 212a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline int char_size() { return static_cast<int>(mode_); } 213a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Equivalent to a conditional branch to the label, unless the label 215a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // is NULL, in which case it is a conditional Backtrack. 216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void BranchOrBacktrack(Condition condition, Label* to); 217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void MarkPositionForCodeRelativeFixup() { 219a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block code_relative_fixup_positions_.Add(masm_->pc_offset()); 220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block void FixupCodeRelativePositions(); 223a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Call and return internally in the generated code in a way that 225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) 226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void SafeCall(Label* to); 227a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void SafeCallTarget(Label* label); 228a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void SafeReturn(); 229a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 230a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Pushes the value of a register on the backtrack stack. Decrements the 231a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // stack pointer (rcx) by a word size and stores the register's value there. 232a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void Push(Register source); 233a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 234a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Pushes a value on the backtrack stack. Decrements the stack pointer (rcx) 235a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // by a word size and stores the value there. 236a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void Push(Immediate value); 237a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 238a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Pushes the Code object relative offset of a label on the backtrack stack 239a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // (i.e., a backtrack target). Decrements the stack pointer (rcx) 240a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // by a word size and stores the value there. 241a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void Push(Label* label); 242a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 243a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Pops a value from the backtrack stack. Reads the word at the stack pointer 244a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // (rcx) and increments it by a word size. 245a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void Pop(Register target); 246a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 247a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Drops the top value from the backtrack stack without reading it. 248a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Increments the stack pointer (rcx) by a word size. 249a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void Drop(); 250a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 251a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Before calling a C-function from generated code, align arguments on stack. 252a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // After aligning the frame, arguments must be stored in esp[0], esp[4], 253a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // etc., not pushed. The argument count assumes all arguments are word sized. 254a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Some compilers/platforms require the stack to be aligned when calling 255a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // C++ code. 256a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Needs a scratch register to do some arithmetic. This register will be 257a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // trashed. 258a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void FrameAlign(int num_arguments); 259a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 260a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Calls a C function and cleans up the space for arguments allocated 261a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // by FrameAlign. The called function is not allowed to trigger a garbage 262a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // collection, since that might move the code and invalidate the return 263a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // address (unless this is somehow accounted for by the called function). 264a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block inline void CallCFunction(ExternalReference function, int num_arguments); 265a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 266a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block MacroAssembler* masm_; 267a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 268a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ZoneList<int> code_relative_fixup_positions_; 269a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 270a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Which mode to generate code for (ASCII or UC16). 271a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Mode mode_; 272a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 273a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // One greater than maximal register index actually used. 274a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int num_registers_; 275a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 276a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Number of registers to output at the end (the saved registers 277a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // are always 0..num_saved_registers_-1) 278a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int num_saved_registers_; 279a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 280a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Labels used internally. 281a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label entry_label_; 282a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label start_label_; 283a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label success_label_; 284a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label backtrack_label_; 285a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label exit_label_; 286a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label check_preempt_label_; 287a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label stack_overflow_label_; 288a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}; 289a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 290a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // V8_NATIVE_REGEXP 291a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 292a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block}} // namespace v8::internal 293a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 294a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ 295