ARM: Enable VFP default NaN mode

src/arm/simulator-arm.h

Index: src/arm/simulator-arm.h
diff --git a/src/arm/simulator-arm.h b/src/arm/simulator-arm.h
index 1776887b66774252f39856e7c10c3e1e5b44d1a6..45ae999b57c7e5f072779bdb13d75e6267d4910a 100644
--- a/src/arm/simulator-arm.h
+++ b/src/arm/simulator-arm.h
@@ -274,6 +274,7 @@ class Simulator {
   // 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);
@@ -379,6 +380,7 @@ class Simulator {
 
   // 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_;