Allow mixing of thread offsets between 32 and 64bit architectures.

Begin a more full implementation x86-64 REX prefixes.
Doesn't implement 64bit thread offset support for the JNI compiler.

Change-Id: If9af2f08a1833c21ddb4b4077f9b03add1a05147
diff --git a/compiler/utils/arm64/assembler_arm64.h b/compiler/utils/arm64/assembler_arm64.h
index 44eb6ff..3abcaad 100644
--- a/compiler/utils/arm64/assembler_arm64.h
+++ b/compiler/utils/arm64/assembler_arm64.h
@@ -79,7 +79,7 @@
 
 class Arm64Exception;
 
-class Arm64Assembler : public Assembler {
+class Arm64Assembler FINAL : public Assembler {
  public:
   Arm64Assembler() : vixl_buf_(new byte[BUF_SIZE]),
   vixl_masm_(new vixl::MacroAssembler(vixl_buf_, BUF_SIZE)) {}
@@ -111,105 +111,97 @@
   // Emit code that will create an activation on the stack.
   void BuildFrame(size_t frame_size, ManagedRegister method_reg,
                   const std::vector<ManagedRegister>& callee_save_regs,
-                  const ManagedRegisterEntrySpills& entry_spills);
+                  const ManagedRegisterEntrySpills& entry_spills) OVERRIDE;
 
   // Emit code that will remove an activation from the stack.
-  void RemoveFrame(size_t frame_size,
-                   const std::vector<ManagedRegister>& callee_save_regs);
+  void RemoveFrame(size_t frame_size, const std::vector<ManagedRegister>& callee_save_regs)
+      OVERRIDE;
 
-  void IncreaseFrameSize(size_t adjust);
-  void DecreaseFrameSize(size_t adjust);
+  void IncreaseFrameSize(size_t adjust) OVERRIDE;
+  void DecreaseFrameSize(size_t adjust) OVERRIDE;
 
   // Store routines.
-  void Store(FrameOffset offs, ManagedRegister src, size_t size);
-  void StoreRef(FrameOffset dest, ManagedRegister src);
-  void StoreRawPtr(FrameOffset dest, ManagedRegister src);
-  void StoreImmediateToFrame(FrameOffset dest, uint32_t imm,
-                                     ManagedRegister scratch);
-  void StoreImmediateToThread(ThreadOffset dest, uint32_t imm,
-                                      ManagedRegister scratch);
-  void StoreStackOffsetToThread(ThreadOffset thr_offs,
-                                        FrameOffset fr_offs,
-                                        ManagedRegister scratch);
-  void StoreStackPointerToThread(ThreadOffset thr_offs);
-  void StoreSpanning(FrameOffset dest, ManagedRegister src,
-                             FrameOffset in_off, ManagedRegister scratch);
+  void Store(FrameOffset offs, ManagedRegister src, size_t size) OVERRIDE;
+  void StoreRef(FrameOffset dest, ManagedRegister src) OVERRIDE;
+  void StoreRawPtr(FrameOffset dest, ManagedRegister src) OVERRIDE;
+  void StoreImmediateToFrame(FrameOffset dest, uint32_t imm, ManagedRegister scratch) OVERRIDE;
+  void StoreImmediateToThread32(ThreadOffset<4> dest, uint32_t imm, ManagedRegister scratch)
+      OVERRIDE;
+  void StoreStackOffsetToThread32(ThreadOffset<4> thr_offs, FrameOffset fr_offs,
+                                  ManagedRegister scratch) OVERRIDE;
+  void StoreStackPointerToThread32(ThreadOffset<4> thr_offs) OVERRIDE;
+  void StoreSpanning(FrameOffset dest, ManagedRegister src, FrameOffset in_off,
+                     ManagedRegister scratch) OVERRIDE;
 
   // Load routines.
-  void Load(ManagedRegister dest, FrameOffset src, size_t size);
-  void Load(ManagedRegister dest, ThreadOffset src, size_t size);
-  void LoadRef(ManagedRegister dest, FrameOffset  src);
-  void LoadRef(ManagedRegister dest, ManagedRegister base,
-               MemberOffset offs);
-  void LoadRawPtr(ManagedRegister dest, ManagedRegister base,
-                  Offset offs);
-  void LoadRawPtrFromThread(ManagedRegister dest,
-                            ThreadOffset offs);
+  void Load(ManagedRegister dest, FrameOffset src, size_t size) OVERRIDE;
+  void LoadFromThread32(ManagedRegister dest, ThreadOffset<4> src, size_t size) OVERRIDE;
+  void LoadRef(ManagedRegister dest, FrameOffset  src) OVERRIDE;
+  void LoadRef(ManagedRegister dest, ManagedRegister base, MemberOffset offs) OVERRIDE;
+  void LoadRawPtr(ManagedRegister dest, ManagedRegister base, Offset offs) OVERRIDE;
+  void LoadRawPtrFromThread32(ManagedRegister dest, ThreadOffset<4> offs) OVERRIDE;
+
   // Copying routines.
-  void Move(ManagedRegister dest, ManagedRegister src, size_t size);
-  void CopyRawPtrFromThread(FrameOffset fr_offs, ThreadOffset thr_offs,
-                            ManagedRegister scratch);
-  void CopyRawPtrToThread(ThreadOffset thr_offs, FrameOffset fr_offs,
-                          ManagedRegister scratch);
-  void CopyRef(FrameOffset dest, FrameOffset src,
-               ManagedRegister scratch);
-  void Copy(FrameOffset dest, FrameOffset src, ManagedRegister scratch, size_t size);
-  void Copy(FrameOffset dest, ManagedRegister src_base, Offset src_offset,
-            ManagedRegister scratch, size_t size);
-  void Copy(ManagedRegister dest_base, Offset dest_offset, FrameOffset src,
-            ManagedRegister scratch, size_t size);
-  void Copy(FrameOffset dest, FrameOffset src_base, Offset src_offset,
-            ManagedRegister scratch, size_t size);
-  void Copy(ManagedRegister dest, Offset dest_offset,
-            ManagedRegister src, Offset src_offset,
-            ManagedRegister scratch, size_t size);
+  void Move(ManagedRegister dest, ManagedRegister src, size_t size) OVERRIDE;
+  void CopyRawPtrFromThread32(FrameOffset fr_offs, ThreadOffset<4> thr_offs,
+                              ManagedRegister scratch) OVERRIDE;
+  void CopyRawPtrToThread32(ThreadOffset<4> thr_offs, FrameOffset fr_offs, ManagedRegister scratch)
+      OVERRIDE;
+  void CopyRef(FrameOffset dest, FrameOffset src, ManagedRegister scratch) OVERRIDE;
+  void Copy(FrameOffset dest, FrameOffset src, ManagedRegister scratch, size_t size) OVERRIDE;
+  void Copy(FrameOffset dest, ManagedRegister src_base, Offset src_offset, ManagedRegister scratch,
+            size_t size) OVERRIDE;
+  void Copy(ManagedRegister dest_base, Offset dest_offset, FrameOffset src, ManagedRegister scratch,
+            size_t size) OVERRIDE;
+  void Copy(FrameOffset dest, FrameOffset src_base, Offset src_offset, ManagedRegister scratch,
+            size_t size) OVERRIDE;
+  void Copy(ManagedRegister dest, Offset dest_offset, ManagedRegister src, Offset src_offset,
+            ManagedRegister scratch, size_t size) OVERRIDE;
   void Copy(FrameOffset dest, Offset dest_offset, FrameOffset src, Offset src_offset,
-            ManagedRegister scratch, size_t size);
-  void MemoryBarrier(ManagedRegister scratch);
+            ManagedRegister scratch, size_t size) OVERRIDE;
+  void MemoryBarrier(ManagedRegister scratch) OVERRIDE;
 
   // Sign extension.
-  void SignExtend(ManagedRegister mreg, size_t size);
+  void SignExtend(ManagedRegister mreg, size_t size) OVERRIDE;
 
   // Zero extension.
-  void ZeroExtend(ManagedRegister mreg, size_t size);
+  void ZeroExtend(ManagedRegister mreg, size_t size) OVERRIDE;
 
   // Exploit fast access in managed code to Thread::Current().
-  void GetCurrentThread(ManagedRegister tr);
-  void GetCurrentThread(FrameOffset dest_offset,
-                        ManagedRegister scratch);
+  void GetCurrentThread(ManagedRegister tr) OVERRIDE;
+  void GetCurrentThread(FrameOffset dest_offset, ManagedRegister scratch) OVERRIDE;
 
   // Set up out_reg to hold a Object** into the SIRT, or to be NULL if the
   // value is null and null_allowed. in_reg holds a possibly stale reference
   // that can be used to avoid loading the SIRT entry to see if the value is
   // NULL.
   void CreateSirtEntry(ManagedRegister out_reg, FrameOffset sirt_offset,
-                       ManagedRegister in_reg, bool null_allowed);
+                       ManagedRegister in_reg, bool null_allowed) OVERRIDE;
 
   // Set up out_off to hold a Object** into the SIRT, or to be NULL if the
   // value is null and null_allowed.
   void CreateSirtEntry(FrameOffset out_off, FrameOffset sirt_offset,
-                       ManagedRegister scratch, bool null_allowed);
+                       ManagedRegister scratch, bool null_allowed) OVERRIDE;
 
   // src holds a SIRT entry (Object**) load this into dst.
-  void LoadReferenceFromSirt(ManagedRegister dst,
-                             ManagedRegister src);
+  void LoadReferenceFromSirt(ManagedRegister dst, ManagedRegister src) OVERRIDE;
 
   // Heap::VerifyObject on src. In some cases (such as a reference to this) we
   // know that src may not be null.
-  void VerifyObject(ManagedRegister src, bool could_be_null);
-  void VerifyObject(FrameOffset src, bool could_be_null);
+  void VerifyObject(ManagedRegister src, bool could_be_null) OVERRIDE;
+  void VerifyObject(FrameOffset src, bool could_be_null) OVERRIDE;
 
   // Call to address held at [base+offset].
-  void Call(ManagedRegister base, Offset offset, ManagedRegister scratch);
-  void Call(FrameOffset base, Offset offset, ManagedRegister scratch);
-  void Call(ThreadOffset offset, ManagedRegister scratch);
+  void Call(ManagedRegister base, Offset offset, ManagedRegister scratch) OVERRIDE;
+  void Call(FrameOffset base, Offset offset, ManagedRegister scratch) OVERRIDE;
+  void CallFromThread32(ThreadOffset<4> offset, ManagedRegister scratch) OVERRIDE;
 
   // Jump to address (not setting link register)
   void JumpTo(ManagedRegister m_base, Offset offs, ManagedRegister m_scratch);
 
   // Generate code to check if Thread::Current()->exception_ is non-null
   // and branch to a ExceptionSlowPath if it is.
-  void ExceptionPoll(ManagedRegister scratch, size_t stack_adjust);
+  void ExceptionPoll(ManagedRegister scratch, size_t stack_adjust) OVERRIDE;
 
  private:
   static vixl::Register reg_x(int code) {