Initial SIMDBC interpreter.

runtime/vm/stub_code_dbc.cc

Index: runtime/vm/stub_code_dbc.cc
diff --git a/runtime/vm/stub_code_dbc.cc b/runtime/vm/stub_code_dbc.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fd906bf8718daa4f897b9501dd3dd568ed379226
--- /dev/null
+++ b/runtime/vm/stub_code_dbc.cc
@@ -0,0 +1,63 @@
+// Copyright (c) 2016, 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/globals.h"
+#if defined(TARGET_ARCH_DBC)
+
+#include "vm/assembler.h"
+#include "vm/code_generator.h"
+#include "vm/cpu.h"
+#include "vm/compiler.h"
+#include "vm/dart_entry.h"
+#include "vm/flow_graph_compiler.h"
+#include "vm/heap.h"
+#include "vm/instructions.h"
+#include "vm/object_store.h"
+#include "vm/stack_frame.h"
+#include "vm/stub_code.h"
+#include "vm/tags.h"
+
+#define __ assembler->
+
+namespace dart {
+
+DEFINE_FLAG(bool, inline_alloc, true, "Inline allocation of objects.");
+DEFINE_FLAG(bool, use_slow_path, false,
+    "Set to true for debugging & verifying the slow paths.");
+DECLARE_FLAG(bool, trace_optimized_ic_calls);
+DECLARE_FLAG(int, optimization_counter_threshold);
+DECLARE_FLAG(bool, support_debugger);
+DECLARE_FLAG(bool, lazy_dispatchers);
+
+void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
+  __ Compile();
+}
+
+
+void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
+  __ Trap();

[zra, 2016/04/14 18:27:50]

So, this will fail at runtime. Should it fail at code generation time with
UNREACHABLE, or UNIMPLEMENTED?

[Vyacheslav Egorov (Google), 2016/04/18 15:56:43]

Can't make this unreachable because this stub is still generate but not used. 

Needs to be cleaned up. Added TODOs.

+}
+
+
+void StubCode::GenerateAllocationStubForClass(Assembler* assembler,
+                                              const Class& cls) {
+  __ Trap();
+}
+
+
+void StubCode::GenerateMegamorphicMissStub(Assembler* assembler) {
+  __ Trap();
+}
+
+
+// Print the stop message.
+DEFINE_LEAF_RUNTIME_ENTRY(void, PrintStopMessage, 1, const char* message) {
+  OS::Print("Stop message: %s\n", message);
+}
+END_LEAF_RUNTIME_ENTRY
+
+
+}  // namespace dart
+
+#endif  // defined TARGET_ARCH_DBC