Initial SIMDBC interpreter.

runtime/vm/simulator_arm.h

 // 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.
 
 // Declares a Simulator for ARM instructions if we are not generating a native
 // ARM binary. This Simulator allows us to run and debug ARM code generation on
 // regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a ARM HW platform.
@@ skipping 34 matching lines @@
   // The currently executing Simulator instance, which is associated to the
   // current isolate
   static Simulator* Current();
 
   // Accessors for register state. Reading the pc value adheres to the ARM
   // architecture specification and is off by 8 from the currently executing
   // instruction.
   void set_register(Register reg, int32_t value);
   int32_t get_register(Register reg) const;
 
+  int32_t get_sp() const {
+    return get_register(SPREG);
+  }
+
   // Special case of set_register and get_register to access the raw PC value.
   void set_pc(int32_t value);
   int32_t get_pc() const;
 
   // Accessors for VFP register state.
   void set_sregister(SRegister reg, float value);
   float get_sregister(SRegister reg) const;
   void set_dregister(DRegister reg, double value);
   double get_dregister(DRegister reg) const;
   void set_qregister(QRegister reg, const simd_value_t& value);
@@ skipping 212 matching lines @@
   }
 
   friend class SimulatorDebugger;
   friend class SimulatorSetjmpBuffer;
   DISALLOW_COPY_AND_ASSIGN(Simulator);
 };
 
 }  // namespace dart
 
 #endif  // VM_SIMULATOR_ARM_H_