Rename A64 port to ARM64 port

src/a64/regexp-macro-assembler-a64.h

Index: src/a64/regexp-macro-assembler-a64.h
diff --git a/src/a64/regexp-macro-assembler-a64.h b/src/a64/regexp-macro-assembler-a64.h
deleted file mode 100644
index ff4f8daa86d4a085909c3a5edb97f37237e9c290..0000000000000000000000000000000000000000
--- a/src/a64/regexp-macro-assembler-a64.h
+++ /dev/null
@@ -1,315 +0,0 @@
-// Copyright 2013 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_A64_REGEXP_MACRO_ASSEMBLER_A64_H_
-#define V8_A64_REGEXP_MACRO_ASSEMBLER_A64_H_
-
-#include "a64/assembler-a64.h"
-#include "a64/assembler-a64-inl.h"
-#include "macro-assembler.h"
-
-namespace v8 {
-namespace internal {
-
-
-#ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerA64: public NativeRegExpMacroAssembler {
- public:
-  RegExpMacroAssemblerA64(Mode mode, int registers_to_save, Zone* zone);
-  virtual ~RegExpMacroAssemblerA64();
-  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);
-  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 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,
-                                  int start_offset,
-                                  const byte** input_start,
-                                  const byte** input_end);
-
- private:
-  // Above the frame pointer - Stored registers and stack passed parameters.
-  // Callee-saved registers x19-x29, where x29 is the old frame pointer.
-  static const int kCalleeSavedRegisters = 0;
-  // Return address.
-  // It is placed above the 11 callee-saved registers.
-  static const int kReturnAddress = kCalleeSavedRegisters + 11 * kPointerSize;
-  static const int kSecondaryReturnAddress = kReturnAddress + kPointerSize;
-  // Stack parameter placed by caller.
-  static const int kIsolate = kSecondaryReturnAddress + kPointerSize;
-
-  // Below the frame pointer.
-  // Register parameters stored by setup code.
-  static const int kDirectCall = kCalleeSavedRegisters - kPointerSize;
-  static const int kStackBase = kDirectCall - kPointerSize;
-  static const int kOutputSize = kStackBase - kPointerSize;
-  static const int kInput = kOutputSize - kPointerSize;
-  // When adding local variables remember to push space for them in
-  // the frame in GetCode.
-  static const int kSuccessCounter = kInput - kPointerSize;
-  // First position register address on the stack. Following positions are
-  // below it. A position is a 32 bit value.
-  static const int kFirstRegisterOnStack = kSuccessCounter - kWRegSize;
-  // A capture is a 64 bit value holding two position.
-  static const int kFirstCaptureOnStack = kSuccessCounter - kXRegSize;
-
-  // Initial size of code buffer.
-  static const size_t kRegExpCodeSize = 1024;
-
-  // When initializing registers to a non-position value we can unroll
-  // the loop. Set the limit of registers to unroll.
-  static const int kNumRegistersToUnroll = 16;
-
-  // We are using x0 to x7 as a register cache. Each hardware register must
-  // contain one capture, that is two 32 bit registers. We can cache at most
-  // 16 registers.
-  static const int kNumCachedRegisters = 16;
-
-  // 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);
-
-  // Location of a 32 bit position register.
-  MemOperand register_location(int register_index);
-
-  // Location of a 64 bit capture, combining two position registers.
-  MemOperand capture_location(int register_index, Register scratch);
-
-  // Register holding the current input position as negative offset from
-  // the end of the string.
-  Register current_input_offset() { return w21; }
-
-  // The register containing the current character after LoadCurrentCharacter.
-  Register current_character() { return w22; }
-
-  // Register holding address of the end of the input string.
-  Register input_end() { return x25; }
-
-  // Register holding address of the start of the input string.
-  Register input_start() { return x26; }
-
-  // Register holding the offset from the start of the string where we should
-  // start matching.
-  Register start_offset() { return w27; }
-
-  // Pointer to the output array's first element.
-  Register output_array() { return x28; }
-
-  // Register holding the frame address. Local variables, parameters and
-  // regexp registers are addressed relative to this.
-  Register frame_pointer() { return fp; }
-
-  // The register containing the backtrack stack top. Provides a meaningful
-  // name to the register.
-  Register backtrack_stackpointer() { return x23; }
-
-  // Register holding pointer to the current code object.
-  Register code_pointer() { return x20; }
-
-  // Register holding the value used for clearing capture registers.
-  Register non_position_value() { return w24; }
-  // The top 32 bit of this register is used to store this value
-  // twice. This is used for clearing more than one register at a time.
-  Register twice_non_position_value() { return x24; }
-
-  // Byte size of chars in the string to match (decided by the Mode argument)
-  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);
-
-  // Compares reg against immmediate before calling BranchOrBacktrack.
-  // It makes use of the Cbz and Cbnz instructions.
-  void CompareAndBranchOrBacktrack(Register reg,
-                                   int immediate,
-                                   Condition condition,
-                                   Label* to);
-
-  inline void CallIf(Label* to, Condition condition);
-
-  // Save and restore the link register on the stack in a way that
-  // is GC-safe.
-  inline void SaveLinkRegister();
-  inline void RestoreLinkRegister();
-
-  // 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);
-
-  // This state indicates where the register actually is.
-  enum RegisterState {
-    STACKED,     // Resides in memory.
-    CACHED_LSW,  // Least Significant Word of a 64 bit hardware register.
-    CACHED_MSW   // Most Significant Word of a 64 bit hardware register.
-  };
-
-  RegisterState GetRegisterState(int register_index) {
-    ASSERT(register_index >= 0);
-    if (register_index >= kNumCachedRegisters) {
-      return STACKED;
-    } else {
-      if ((register_index % 2) == 0) {
-        return CACHED_LSW;
-      } else {
-        return CACHED_MSW;
-      }
-    }
-  }
-
-  // Store helper that takes the state of the register into account.
-  inline void StoreRegister(int register_index, Register source);
-
-  // Returns a hardware W register that holds the value of the capture
-  // register.
-  //
-  // This function will try to use an existing cache register (w0-w7) for the
-  // result. Otherwise, it will load the value into maybe_result.
-  //
-  // If the returned register is anything other than maybe_result, calling code
-  // must not write to it.
-  inline Register GetRegister(int register_index, Register maybe_result);
-
-  // Returns the harware register (x0-x7) holding the value of the capture
-  // register.
-  // This assumes that the state of the register is not STACKED.
-  inline Register GetCachedRegister(int register_index);
-
-  Isolate* isolate() const { return masm_->isolate(); }
-
-  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_A64_REGEXP_MACRO_ASSEMBLER_A64_H_