Initial SIMDBC interpreter.

runtime/vm/stub_code.cc

 // Copyright (c) 2012, 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/stub_code.h"
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "vm/assembler.h"
 #include "vm/disassembler.h"
@@ skipping 67 matching lines @@
 
 
 void StubCode::Init(Isolate* isolate) { }
 
 
 void StubCode::VisitObjectPointers(ObjectPointerVisitor* visitor) {
 }
 
 
 bool StubCode::HasBeenInitialized() {
+#if !defined(TARGET_ARCH_DBC)
   // Use JumpToExceptionHandler and InvokeDart as canaries.
   const StubEntry* entry_1 = StubCode::JumpToExceptionHandler_entry();
   const StubEntry* entry_2 = StubCode::InvokeDartCode_entry();
   return (entry_1 != NULL) && (entry_2 != NULL);
+#else
+  return true;
+#endif
 }
 
 
 bool StubCode::InInvocationStub(uword pc) {
+#if !defined(TARGET_ARCH_DBC)
   ASSERT(HasBeenInitialized());
   uword entry = StubCode::InvokeDartCode_entry()->EntryPoint();
   uword size = StubCode::InvokeDartCodeSize();
   return (pc >= entry) && (pc < (entry + size));
+#else
+  // On DBC we use a special marker PC to signify entry frame because there is
+  // no such thing as invocation stub.
+  return (pc & 2) != 0;
+#endif
 }
 
 
 bool StubCode::InJumpToExceptionHandlerStub(uword pc) {
+#if !defined(TARGET_ARCH_DBC)
   ASSERT(HasBeenInitialized());
   uword entry = StubCode::JumpToExceptionHandler_entry()->EntryPoint();
   uword size = StubCode::JumpToExceptionHandlerSize();
   return (pc >= entry) && (pc < (entry + size));
+#else
+  // This stub does not exist on DBC.
+  return false;
+#endif
 }
 
 
 RawCode* StubCode::GetAllocationStubForClass(const Class& cls) {
+  // These stubs are not used by DBC.
+#if !defined(TARGET_ARCH_DBC)
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   const Error& error = Error::Handle(zone, cls.EnsureIsFinalized(thread));
   ASSERT(error.IsNull());
   if (cls.id() == kArrayCid) {
     return AllocateArray_entry()->code();
   }
   Code& stub = Code::Handle(zone, cls.allocation_stub());
   if (stub.IsNull()) {
     Assembler assembler;
@@ skipping 40 matching lines @@
 #ifndef PRODUCT
       DisassembleToStdout formatter;
       stub.Disassemble(&formatter);
 #endif
       THR_Print("}\n");
       const ObjectPool& object_pool = ObjectPool::Handle(stub.object_pool());
       object_pool.DebugPrint();
     }
   }
   return stub.raw();
+#endif
+  UNIMPLEMENTED();
+  return Code::null();
 }
 
 
 const StubEntry* StubCode::UnoptimizedStaticCallEntry(
     intptr_t num_args_tested) {
+  // These stubs are not used by DBC.
+#if !defined(TARGET_ARCH_DBC)
   switch (num_args_tested) {
     case 0:
       return ZeroArgsUnoptimizedStaticCall_entry();
     case 1:
       return OneArgUnoptimizedStaticCall_entry();
     case 2:
       return TwoArgsUnoptimizedStaticCall_entry();
     default:
       UNIMPLEMENTED();
       return NULL;
   }
+#else
+  return NULL;
+#endif
 }
 
 
 RawCode* StubCode::Generate(const char* name,
                             void (*GenerateStub)(Assembler* assembler)) {
   Assembler assembler;
   GenerateStub(&assembler);
   const Code& code = Code::Handle(
       Code::FinalizeCode(name, &assembler, false /* optimized */));
   if (FLAG_support_disassembler && FLAG_disassemble_stubs) {
@@ skipping 14 matching lines @@
   if ((name##_entry() != NULL) &&                                              \
       (entry_point == name##_entry()->EntryPoint())) {                         \
     return ""#name;                                                            \
   }
   VM_STUB_CODE_LIST(VM_STUB_CODE_TESTER);
 #undef VM_STUB_CODE_TESTER
   return NULL;
 }
 
 }  // namespace dart