First draft of the sh4 port

src/sh4/simulator-sh4.h

Index: src/sh4/simulator-sh4.h
diff --git a/src/ia32/simulator-ia32.h b/src/sh4/simulator-sh4.h
similarity index 72%
copy from src/ia32/simulator-ia32.h
copy to src/sh4/simulator-sh4.h
index 478d4ce5cb309b0a27575b8741ead47c3fb7675a..51ee215cf4dcc6ca1d04eb4189198ee6e7dabaee 100644
--- a/src/ia32/simulator-ia32.h
+++ b/src/sh4/simulator-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:
@@ -25,38 +25,39 @@
 // (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_IA32_SIMULATOR_IA32_H_
-#define V8_IA32_SIMULATOR_IA32_H_
+#ifndef V8_SH4_SIMULATOR_SH4_H_
+#define V8_SH4_SIMULATOR_SH4_H_
 
 #include "allocation.h"
 
 namespace v8 {
 namespace internal {
 
-// Since there is no simulator for the ia32 architecture the only thing we can
-// do is to call the entry directly.
+// When running without a simulator we call the entry directly.
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
   (entry(p0, p1, p2, p3, p4))
 
+typedef int (*sh4_regexp_matcher)(String*, int, const byte*, const byte*,
+                                  void*, int*, int, Address, int, Isolate*);
 
-typedef int (*regexp_matcher)(String*, int, const byte*,
-                              const byte*, int*, int, Address, int, Isolate*);
 
-// Call the generated regexp code directly. The code at the entry address should
-// expect eight int/pointer sized arguments and return an int.
+// Call the generated regexp code directly. The code at the entry address
+// should act as a function matching the type arm_regexp_matcher.
+// The fifth argument is a dummy that reserves the space used for
+// the return address added by the ExitFrame in native calls.
 #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6, p7, p8) \
-  (FUNCTION_CAST<regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, p8))
-
+  (FUNCTION_CAST<sh4_regexp_matcher>(entry)(                              \
+      p0, p1, p2, p3, NULL, p4, p5, p6, p7, p8))
 
 #define TRY_CATCH_FROM_ADDRESS(try_catch_address) \
-  (reinterpret_cast<TryCatch*>(try_catch_address))
+  reinterpret_cast<TryCatch*>(try_catch_address)
 
 // The stack limit beyond which we will throw stack overflow errors in
-// generated code. Because generated code on ia32 uses the C stack, we
+// generated code. Because generated code on sh4 uses the C stack, we
 // just use the C stack limit.
 class SimulatorStack : public v8::internal::AllStatic {
  public:
-  static inline uintptr_t JsLimitFromCLimit(Isolate* isolate,
+  static inline uintptr_t JsLimitFromCLimit(v8::internal::Isolate* isolate,
                                             uintptr_t c_limit) {
     USE(isolate);
     return c_limit;
@@ -71,4 +72,4 @@ class SimulatorStack : public v8::internal::AllStatic {
 
 } }  // namespace v8::internal
 
-#endif  // V8_IA32_SIMULATOR_IA32_H_
+#endif  // V8_SH4_SIMULATOR_SH4_H_