Move regexp implementation into its own folder.

src/ppc/regexp-macro-assembler-ppc.h

-// Copyright 2014 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_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
-#define V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
-
-#include "src/macro-assembler.h"
-#include "src/ppc/assembler-ppc.h"
-#include "src/ppc/frames-ppc.h"
-
-namespace v8 {
-namespace internal {
-
-
-#ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerPPC : public NativeRegExpMacroAssembler {
- public:
-  RegExpMacroAssemblerPPC(Isolate* isolate, Zone* zone, Mode mode,
-                          int registers_to_save);
-  virtual ~RegExpMacroAssemblerPPC();
-  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(unsigned c, Label* on_equal);
-  virtual void CheckCharacterAfterAnd(unsigned c, unsigned 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(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 CheckNotCharacter(unsigned c, Label* on_not_equal);
-  virtual void CheckNotCharacterAfterAnd(unsigned c, unsigned 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.
-  // Register 25..31.
-  static const int kStoredRegisters = kFramePointer;
-  // Return address (stored from link register, read into pc on return).
-  static const int kReturnAddress = kStoredRegisters + 7 * kPointerSize;
-  static const int kCallerFrame = kReturnAddress + kPointerSize;
-  // Stack parameters placed by caller.
-  static const int kSecondaryReturnAddress =
-      kCallerFrame + kStackFrameExtraParamSlot * kPointerSize;
-  static const int kIsolate = kSecondaryReturnAddress + kPointerSize;
-
-  // Below the frame pointer.
-  // Register parameters stored by setup code.
-  static const int kDirectCall = kFramePointer - kPointerSize;
-  static const int kStackHighEnd = kDirectCall - kPointerSize;
-  static const int kNumOutputRegisters = kStackHighEnd - kPointerSize;
-  static const int kRegisterOutput = kNumOutputRegisters - kPointerSize;
-  static const int kInputEnd = kRegisterOutput - 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 kInputStartMinusOne = kSuccessfulCaptures - 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.
-  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 r27; }
-
-  // The register containing the current character after LoadCurrentCharacter.
-  inline Register current_character() { return r28; }
-
-  // Register holding address of the end of the input string.
-  inline Register end_of_input_address() { return r30; }
-
-  // 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 r29; }
-
-  // Register holding pointer to the current code object.
-  inline Register code_pointer() { return r26; }
-
-  // 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, CRegister cr = cr7);
-
-  // 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 = al, CRegister cr = cr7);
-  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_;
-};
-
-// Set of non-volatile registers saved/restored by generated regexp code.
-const RegList kRegExpCalleeSaved =
-    1 << 25 | 1 << 26 | 1 << 27 | 1 << 28 | 1 << 29 | 1 << 30 | 1 << 31;
-
-#endif  // V8_INTERPRETED_REGEXP
-}
-}  // namespace v8::internal
-
-#endif  // V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_