First draft of the sh4 port

src/sh4/regexp-macro-assembler-sh4.h

-// Copyright 2012 the V8 project authors. All rights reserved.
+// Copyright 2011-2012 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_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
-#define V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#ifndef V8_SH4_REGEXP_MACRO_ASSEMBLER_SH4_H_
+#define V8_SH4_REGEXP_MACRO_ASSEMBLER_SH4_H_
 
-#include "arm/assembler-arm.h"
-#include "arm/assembler-arm-inl.h"
+#include "sh4/assembler-sh4.h"
+#include "sh4/assembler-sh4-inl.h"
 
 namespace v8 {
 namespace internal {
 
 
-#ifndef V8_INTERPRETED_REGEXP
-class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
+#ifdef V8_INTERPRETED_REGEXP
+class RegExpMacroAssemblerSH4: public RegExpMacroAssembler {
  public:
-  RegExpMacroAssemblerARM(Mode mode, int registers_to_save, Zone* zone);
-  virtual ~RegExpMacroAssemblerARM();
+  RegExpMacroAssemblerSH4();
+  virtual ~RegExpMacroAssemblerSH4();
+};
+
+#else  // V8_INTERPRETED_REGEXP
+class RegExpMacroAssemblerSH4: public NativeRegExpMacroAssembler {
+ public:
+  RegExpMacroAssemblerSH4(Mode mode, int registers_to_save, Zone* zone);
+  virtual ~RegExpMacroAssemblerSH4();
   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 49 matching lines @@
   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 4..11.
   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 kReturnAddress = kStoredRegisters + 7 * kPointerSize;
   static const int kSecondaryReturnAddress = 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;
 
   // Below the frame pointer.
   // Register parameters stored by setup code.
   static const int kInputEnd = kFramePointer - 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();
 
-  void EmitBacktrackConstantPool();
-  int GetBacktrackConstantPoolEntry();
-
-
   // 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; }
 
   // The register containing the current character after LoadCurrentCharacter.
   inline Register current_character() { return r7; }
 
   // 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 r9; }
 
   // 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; }
 
   // Register holding pointer to the current code object.
@@ skipping 34 matching lines @@
   // 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_;
 
-  // Manage a small pre-allocated pool for writing label targets
-  // to for pushing backtrack addresses.
-  int backtrack_constant_pool_offset_;
-  int backtrack_constant_pool_capacity_;
-
   // 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_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_SH4_REGEXP_MACRO_ASSEMBLER_SH4_H_