ARM: Enable VFP default NaN mode

src/arm/constants-arm.h

 // Copyright 2011 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 385 matching lines @@
 };
 
 // This mask does not include the "inexact" or "input denormal" cumulative
 // exceptions flags, because we usually don't want to check for it.
 const uint32_t kVFPExceptionMask = 0xf;
 const uint32_t kVFPInvalidOpExceptionBit = 1 << 0;
 const uint32_t kVFPOverflowExceptionBit = 1 << 2;
 const uint32_t kVFPUnderflowExceptionBit = 1 << 3;
 const uint32_t kVFPInexactExceptionBit = 1 << 4;
 const uint32_t kVFPFlushToZeroMask = 1 << 24;
+const uint32_t kVFPDefaultNaNModeControlBit = 1 << 25;
 
 const uint32_t kVFPNConditionFlagBit = 1 << 31;
 const uint32_t kVFPZConditionFlagBit = 1 << 30;
 const uint32_t kVFPCConditionFlagBit = 1 << 29;
 const uint32_t kVFPVConditionFlagBit = 1 << 28;
 
 
 // VFP rounding modes. See ARM DDI 0406B Page A2-29.
 enum VFPRoundingMode {
   RN = 0 << 22,   // Round to Nearest.
@@ skipping 362 matching lines @@
   static int Number(const char* name, bool* is_double);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_