ARM: Enable VFP default NaN mode

src/arm/simulator-arm.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 256 matching lines @@
                     int32_t right,
                     bool addition);
 
   inline int GetCarry() {
     return c_flag_ ? 1 : 0;
   };
 
   // Support for VFP.
   void Compute_FPSCR_Flags(double val1, double val2);
   void Copy_FPSCR_to_APSR();
+  inline double canonicalizeNaN(double value);
 
   // Helper functions to decode common "addressing" modes
   int32_t GetShiftRm(Instruction* instr, bool* carry_out);
   int32_t GetImm(Instruction* instr, bool* carry_out);
   void ProcessPUW(Instruction* instr,
                   int num_regs,
                   int operand_size,
                   intptr_t* start_address,
                   intptr_t* end_address);
   void HandleRList(Instruction* instr, bool load);
@@ skipping 85 matching lines @@
 
   // VFP architecture state.
   unsigned int vfp_registers_[num_d_registers * 2];
   bool n_flag_FPSCR_;
   bool z_flag_FPSCR_;
   bool c_flag_FPSCR_;
   bool v_flag_FPSCR_;
 
   // VFP rounding mode. See ARM DDI 0406B Page A2-29.
   VFPRoundingMode FPSCR_rounding_mode_;
+  bool FPSCR_default_NaN_mode_;
 
   // VFP FP exception flags architecture state.
   bool inv_op_vfp_flag_;
   bool div_zero_vfp_flag_;
   bool overflow_vfp_flag_;
   bool underflow_vfp_flag_;
   bool inexact_vfp_flag_;
 
   // Simulator support.
   char* stack_;
@@ skipping 65 matching lines @@
 
   static inline void UnregisterCTryCatch() {
     Simulator::current(Isolate::Current())->PopAddress();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_ARM_SIMULATOR_ARM_H_