First draft of the sh4 port

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

Index: src/sh4/regexp-macro-assembler-sh4.h
diff --git a/src/arm/regexp-macro-assembler-arm.h b/src/sh4/regexp-macro-assembler-sh4.h
similarity index 91%
copy from src/arm/regexp-macro-assembler-arm.h
copy to src/sh4/regexp-macro-assembler-sh4.h
index c45669ae899f0f709cc4dc3bfa6ab0f71efd57bf..a90ea4c1a256cef5d2d11a9dc43db3e6fbc83c79 100644
--- a/src/arm/regexp-macro-assembler-arm.h
+++ b/src/sh4/regexp-macro-assembler-sh4.h
@@ -1,4 +1,4 @@
-// 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:
@@ -25,21 +25,28 @@
 // (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);
@@ -109,7 +116,6 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   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
@@ -126,7 +132,7 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   // 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;
@@ -151,8 +157,6 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   // 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);
@@ -163,10 +167,6 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   // 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);
 
@@ -181,7 +181,7 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   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.
@@ -236,11 +236,6 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   // 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_;
@@ -256,4 +251,4 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
 
 }}  // namespace v8::internal
 
-#endif  // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
+#endif  // V8_SH4_REGEXP_MACRO_ASSEMBLER_SH4_H_