Initial SIMDBC interpreter.

runtime/vm/code_generator.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 636 matching lines @@
 
 // Result of an invoke may be an unhandled exception, in which case we
 // rethrow it.
 static void CheckResultError(const Object& result) {
   if (result.IsError()) {
     Exceptions::PropagateError(Error::Cast(result));
   }
 }
 
 
+#if !defined(TARGET_ARCH_DBC)
 // Gets called from debug stub when code reaches a breakpoint
 // set on a runtime stub call.
 DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
   if (!FLAG_support_debugger) {
     UNREACHABLE();
     return;
   }
   DartFrameIterator iterator;
   StackFrame* caller_frame = iterator.NextFrame();
   ASSERT(caller_frame != NULL);
   const Code& orig_stub = Code::Handle(
       zone, isolate->debugger()->GetPatchedStubAddress(caller_frame->pc()));
   const Error& error =
       Error::Handle(zone, isolate->debugger()->SignalBpReached());
   if (!error.IsNull()) {
     Exceptions::PropagateError(error);
     UNREACHABLE();
   }
   arguments.SetReturn(orig_stub);
 }
+#else
+// Gets called from the simulator when the breakpoint is reached.
+DEFINE_RUNTIME_ENTRY(BreakpointRuntimeHandler, 0) {
+  if (!FLAG_support_debugger) {
+    UNREACHABLE();
+    return;
+  }
+  const Error& error = Error::Handle(isolate->debugger()->SignalBpReached());
+  if (!error.IsNull()) {
+    Exceptions::PropagateError(error);
+    UNREACHABLE();
+  }
+}
+#endif  // !defined(TARGET_ARCH_DBC)
 
 
 DEFINE_RUNTIME_ENTRY(SingleStepHandler, 0) {
   if (!FLAG_support_debugger) {
     UNREACHABLE();
     return;
   }
   const Error& error =
       Error::Handle(zone, isolate->debugger()->DebuggerStepCallback());
   if (!error.IsNull()) {
@@ skipping 262 matching lines @@
   arguments.SetReturn(target);
 }
 
 
 // Handle a miss of a megamorphic cache.
 //   Arg0: Receiver.
 //   Arg1: ICData or MegamorphicCache.
 //   Arg2: Arguments descriptor array.
 //   Returns: target function to call.
 DEFINE_RUNTIME_ENTRY(MegamorphicCacheMissHandler, 3) {
+// DBC does not use megamorphic calls right now.
+#if !defined(TARGET_ARCH_DBC)
   const Instance& receiver = Instance::CheckedHandle(zone, arguments.ArgAt(0));
   const Object& ic_data_or_cache = Object::Handle(zone, arguments.ArgAt(1));
   const Array& descriptor = Array::CheckedHandle(zone, arguments.ArgAt(2));
   String& name = String::Handle(zone);
   if (ic_data_or_cache.IsICData()) {
     name = ICData::Cast(ic_data_or_cache).target_name();
   } else {
     ASSERT(ic_data_or_cache.IsMegamorphicCache());
     name = MegamorphicCache::Cast(ic_data_or_cache).target_name();
   }
@@ skipping 37 matching lines @@
                                          code, ic_data, cache, stub);
     }
   } else {
     const MegamorphicCache& cache = MegamorphicCache::Cast(ic_data_or_cache);
     // Insert function found into cache and return it.
     cache.EnsureCapacity();
     const Smi& class_id = Smi::Handle(zone, Smi::New(cls.id()));
     cache.Insert(class_id, target_function);
   }
   arguments.SetReturn(target_function);
+#else
+  UNREACHABLE();
+#endif  // !defined(TARGET_ARCH_DBC)
 }
 
 
 // Invoke appropriate noSuchMethod or closure from getter.
 // Arg0: receiver
 // Arg1: ICData or MegamorphicCache
 // Arg2: arguments descriptor array
 // Arg3: arguments array
 DEFINE_RUNTIME_ENTRY(InvokeNoSuchMethodDispatcher, 4) {
   ASSERT(!FLAG_lazy_dispatchers);
@@ skipping 159 matching lines @@
                                     original_function_name,
                                     orig_arguments,
                                     orig_arguments_desc));
   CheckResultError(result);
   arguments.SetReturn(result);
 }
 
 
 DEFINE_RUNTIME_ENTRY(StackOverflow, 0) {
 #if defined(USING_SIMULATOR)
-  uword stack_pos = Simulator::Current()->get_register(SPREG);
+  uword stack_pos = Simulator::Current()->get_sp();
 #else
   uword stack_pos = Thread::GetCurrentStackPointer();
 #endif
   // Always clear the stack overflow flags.  They are meant for this
   // particular stack overflow runtime call and are not meant to
   // persist.
   uword stack_overflow_flags = thread->GetAndClearStackOverflowFlags();
 
   // If an interrupt happens at the same time as a stack overflow, we
   // process the stack overflow now and leave the interrupt for next
   // time.
-  if (stack_pos < thread->saved_stack_limit()) {
+  if (IsCalleeFrameOf(thread->saved_stack_limit(), stack_pos)) {
     // Use the preallocated stack overflow exception to avoid calling
     // into dart code.
     const Instance& exception =
         Instance::Handle(isolate->object_store()->stack_overflow());
     Exceptions::Throw(thread, exception);
     UNREACHABLE();
   }
 
   // The following code is used to stress test deoptimization and
   // debugger stack tracing.
@@ skipping 600 matching lines @@
   const intptr_t elm_size = old_data.ElementSizeInBytes();
   const TypedData& new_data =
       TypedData::Handle(TypedData::New(cid, new_size, Heap::kOld));
   TypedData::Copy(new_data, 0, old_data, 0, old_size * elm_size);
   typed_data_cell.SetAt(0, new_data);
   arguments.SetReturn(new_data);
 }
 
 
 }  // namespace dart