Contribution of PowerPC port.

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

 // Copyright 2012 the V8 project authors. All rights reserved.
+//
+// Copyright IBM Corp. 2012, 2013. 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_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
-#define V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#ifndef V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
+#define V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_
 
-#include "src/arm/assembler-arm.h"
-#include "src/arm/assembler-arm-inl.h"
 #include "src/macro-assembler.h"
+#include "src/ppc/assembler-ppc.h"
+#include "src/ppc/assembler-ppc-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
 #ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
+class RegExpMacroAssemblerPPC : public NativeRegExpMacroAssembler {
  public:
-  RegExpMacroAssemblerARM(Mode mode, int registers_to_save, Zone* zone);
-  virtual ~RegExpMacroAssemblerARM();
+  RegExpMacroAssemblerPPC(Mode mode, int registers_to_save, Zone* zone);
+  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,
+  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,
+  virtual void CheckNotCharacterAfterAnd(unsigned c, unsigned mask,
                                          Label* on_not_equal);
-  virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
-                                              uc16 minus,
-                                              uc16 mask,
+  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,
+  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 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,
+  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,
+  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 4..11.
+  // Register 25..31.
   static const int kStoredRegisters = kFramePointer;
   // Return address (stored from link register, read into pc on return).
-  static const int kReturnAddress = kStoredRegisters + 8 * kPointerSize;
-  static const int kSecondaryReturnAddress = kReturnAddress + kPointerSize;
+  static const int kReturnAddress = kStoredRegisters + 7 * kPointerSize;
+  static const int kCallerFrame = kReturnAddress + kPointerSize;
   // Stack parameters placed by caller.
-  static const int kRegisterOutput = kSecondaryReturnAddress + kPointerSize;
-  static const int kNumOutputRegisters = kRegisterOutput + kPointerSize;
-  static const int kStackHighEnd = kNumOutputRegisters + kPointerSize;
-  static const int kDirectCall = kStackHighEnd + kPointerSize;
-  static const int kIsolate = kDirectCall + kPointerSize;
+  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 kInputEnd = kFramePointer - kPointerSize;
+  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;
 
-  static const int kBacktrackConstantPoolSize = 4;
-
   // 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 r6; }
+  inline Register current_input_offset() { return r27; }
 
   // The register containing the current character after LoadCurrentCharacter.
-  inline Register current_character() { return r7; }
+  inline Register current_character() { return r28; }
 
   // Register holding address of the end of the input string.
-  inline Register end_of_input_address() { return r10; }
+  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 r8; }
+  inline Register backtrack_stackpointer() { return r29; }
 
   // Register holding pointer to the current code object.
-  inline Register code_pointer() { return r5; }
+  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);
+  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);
+  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);
@@ skipping 13 matching lines @@
   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
 
-
-}}  // namespace v8::internal
-
-#endif  // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_