First draft of the sh4 port

src/sh4/register-allocator-sh4-inl.h

Index: src/sh4/register-allocator-sh4-inl.h
diff --git a/src/ia32/frames-ia32.cc b/src/sh4/register-allocator-sh4-inl.h
similarity index 68%
copy from src/ia32/frames-ia32.cc
copy to src/sh4/register-allocator-sh4-inl.h
index dd44f0ee5ff12dc7de0df1a33a544e6c19723934..dd138ee7748d49a5bfe93a83c4f66958898e17cc 100644
--- a/src/ia32/frames-ia32.cc
+++ b/src/sh4/register-allocator-sh4-inl.h
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 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 +25,42 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include "v8.h"
-
-#if defined(V8_TARGET_ARCH_IA32)
+#ifndef V8_SH4_REGISTER_ALLOCATOR_SH4_INL_H_
+#define V8_SH4_REGISTER_ALLOCATOR_SH4_INL_H_
 
-#include "frames-inl.h"
+#include "v8.h"
 
 namespace v8 {
 namespace internal {
 
+// -------------------------------------------------------------------------
+// RegisterAllocator implementation.
+
+bool RegisterAllocator::IsReserved(Register reg) {
+  UNIMPLEMENTED();
+}
+
+
+// The register allocator uses small integers to represent the
+// non-reserved assembler registers.  The mapping is:
+
+// eax <-> 0, ebx <-> 1, ecx <-> 2, edx <-> 3, edi <-> 4.
+
+int RegisterAllocator::ToNumber(Register reg) {
+  UNIMPLEMENTED();
+}
+
+
+Register RegisterAllocator::ToRegister(int num) {
+  UNIMPLEMENTED();
+}
+
 
-Address ExitFrame::ComputeStackPointer(Address fp) {
-  return Memory::Address_at(fp + ExitFrameConstants::kSPOffset);
+void RegisterAllocator::Initialize() {
+  UNIMPLEMENTED();
 }
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_SH4_REGISTER_ALLOCATOR_SH4_INL_H_