Move backend specific files to separate directories.

src/regexp-macro-assembler-ia32.h

Index: src/regexp-macro-assembler-ia32.h
diff --git a/src/regexp-macro-assembler-ia32.h b/src/regexp-macro-assembler-ia32.h
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-// 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 REGEXP_MACRO_ASSEMBLER_IA32_H_
-#define REGEXP_MACRO_ASSEMBLER_IA32_H_
-
-namespace v8 { namespace internal {
-
-class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
- public:
-  // Type of input string to generate code for.
-  enum Mode { ASCII = 1, UC16 = 2 };
-  // Result of calling the generated RegExp code:
-  // RETRY: Something significant changed during execution, and the matching
-  //        should be retried from scratch.
-  // EXCEPTION: Something failed during execution. If no exception has been
-  //        thrown, it's an internal out-of-memory, and the caller should
-  //        throw the exception.
-  // FAILURE: Matching failed.
-  // SUCCESS: Matching succeeded, and the output array has been filled with
-  //        capture positions.
-  enum Result { RETRY = -2, EXCEPTION = -1, FAILURE = 0, SUCCESS = 1 };
-
-  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 CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
-  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,
-                                          int cp_offset,
-                                          bool check_offset,
-                                          Label* on_no_match);
-  virtual void DispatchByteMap(uc16 start,
-                               Label* byte_map,
-                               const Vector<Label*>& destinations);
-  virtual void DispatchHalfNibbleMap(uc16 start,
-                                     Label* half_nibble_map,
-                                     const Vector<Label*>& destinations);
-  virtual void DispatchHighByteMap(byte start,
-                                   Label* byte_map,
-                                   const Vector<Label*>& destinations);
-  virtual void EmitOrLink(Label* label);
-  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 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);
-
-  static Result Match(Handle<Code> regexp,
-                      Handle<String> subject,
-                      int* offsets_vector,
-                      int offsets_vector_length,
-                      int previous_index);
-
-  static Result Execute(Code* code,
-                        String* input,
-                        int start_offset,
-                        const byte* input_start,
-                        const byte* input_end,
-                        int* output,
-                        bool at_start);
-
- 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 kAtStart = kRegisterOutput + kPointerSize;
-  static const int kStackHighEnd = kAtStart + 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;
-  // Initial size of constant buffers allocated during compilation.
-  static const int kRegExpConstantsSize = 256;
-
-  static const byte* StringCharacterPosition(String* subject, int start_index);
-
-  // Compares two-byte strings case insensitively.
-  // Called from generated RegExp code.
-  static int CaseInsensitiveCompareUC16(Address byte_offset1,
-                                        Address byte_offset2,
-                                        size_t byte_length);
-
-  // 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();
-
-  // 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);
-
-  // Generate a call to CheckStackGuardState.
-  void CallCheckStackGuardState(Register scratch);
-
-  // Called from RegExp if the backtrack stack limit is hit.
-  // Tries to expand the stack. Returns the new stack-pointer if
-  // successful, and updates the stack_top address, or returns 0 if unable
-  // to grow the stack.
-  // This function must not trigger a garbage collection.
-  static Address GrowStack(Address stack_pointer, Address* stack_top);
-
-  // 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);
-
-  // Load the address of a "constant buffer" (a slice of a byte array)
-  // into a register. The address is computed from the ByteArray* address
-  // and an offset. Uses no extra registers.
-  void LoadConstantBufferAddress(Register reg, ArraySlice* buffer);
-
-  // 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();
-
-  // 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);
-
-  // Before calling a C-function from generated code, align arguments on stack.
-  // After aligning the frame, arguments must be stored in esp[0], esp[4],
-  // etc., not pushed. The argument count assumes all arguments are word sized.
-  // Some compilers/platforms require the stack to be aligned when calling
-  // C++ code.
-  // Needs a scratch register to do some arithmetic. This register will be
-  // trashed.
-  inline void FrameAlign(int num_arguments, Register scratch);
-
-  // Calls a C function and cleans up the space for arguments allocated
-  // by FrameAlign. The called function is not allowed to trigger a garbage
-  // collection, since that might move the code and invalidate the return
-  // address (unless this is somehow accounted for).
-  inline void CallCFunction(Address function_address, int num_arguments);
-
-  MacroAssembler* masm_;
-
-  // Constant buffer provider. Allocates external storage for storing
-  // constants.
-  ByteArrayProvider constants_;
-
-  // 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_;
-};
-
-}}  // namespace v8::internal
-
-#endif /* REGEXP_MACRO_ASSEMBLER_IA32_H_ */