DBC: Implement TestSmi instruction.

runtime/vm/simulator_dbc.cc

 // 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 <setjmp.h>  // NOLINT
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_DBC)
 
@@ skipping 2030 matching lines @@
       Exit(thread, FP, SP + 2, pc);
       NativeArguments args(thread, 1, SP + 1, SP);
       INVOKE_RUNTIME(DRT_NonBoolTypeError, args);
     }
 
   AssertBooleanOk:
     DISPATCH();
   }
 
   {
+    BYTECODE(TestSmi, A_D);
+    intptr_t left = reinterpret_cast<intptr_t>(RAW_CAST(Smi, FP[rA]));
+    intptr_t right = reinterpret_cast<intptr_t>(RAW_CAST(Smi, FP[rD]));
+    if ((left & right) != 0) {
+      pc++;
+    }
+    DISPATCH();
+  }
+
+  {
     BYTECODE(CheckSmi, 0);
     intptr_t obj = reinterpret_cast<intptr_t>(FP[rA]);
     if ((obj & kSmiTagMask) == kSmiTag) {
       pc++;
     }
     DISPATCH();
   }
 
   {
     BYTECODE(CheckClassId, A_D);
@@ skipping 383 matching lines @@
   special_[kExceptionSpecialIndex] = raw_exception;
   special_[kStacktraceSpecialIndex] = raw_stacktrace;
   buf->Longjmp();
   UNREACHABLE();
 }
 
 }  // namespace dart
 
 
 #endif  // defined TARGET_ARCH_DBC