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,
                                       Label* on_equal);
@@ skipping 59 matching lines @@
   // 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 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
 
-#endif  // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_PPC_REGEXP_MACRO_ASSEMBLER_PPC_H_