MIPS: Correct handling of Nan values on MIPS R6

src/mips64/simulator-mips64.h

 // Copyright 2011 the V8 project authors. 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 MIPS instructions if we are not generating a native
 // MIPS binary. This Simulator allows us to run and debug MIPS code generation
 // on regular desktop machines.
 // V8 calls into generated code by "calling" the CALL_GENERATED_CODE macro,
 // which will start execution in the Simulator or forwards to the real entry
@@ skipping 184 matching lines @@
   void set_register_word(int reg, int32_t value);
   void set_dw_register(int dreg, const int* dbl);
   int64_t get_register(int reg) const;
   double get_double_from_register_pair(int reg);
   // Same for FPURegisters.
   void set_fpu_register(int fpureg, int64_t value);
   void set_fpu_register_word(int fpureg, int32_t value);
   void set_fpu_register_hi_word(int fpureg, int32_t value);
   void set_fpu_register_float(int fpureg, float value);
   void set_fpu_register_double(int fpureg, double value);
+  void set_fpu_register_invalid_result64(float original, float rounded);
+  void set_fpu_register_invalid_result(float original, float rounded);
+  void set_fpu_register_word_invalid_result(float original, float rounded);
+  void set_fpu_register_invalid_result64(double original, double rounded);
+  void set_fpu_register_invalid_result(double original, double rounded);
+  void set_fpu_register_word_invalid_result(double original, double rounded);
   int64_t get_fpu_register(int fpureg) const;
   int32_t get_fpu_register_word(int fpureg) const;
   int32_t get_fpu_register_signed_word(int fpureg) const;
   int32_t get_fpu_register_hi_word(int fpureg) const;
   float get_fpu_register_float(int fpureg) const;
   double get_fpu_register_double(int fpureg) const;
   void set_fcsr_bit(uint32_t cc, bool value);
   bool test_fcsr_bit(uint32_t cc);
   bool set_fcsr_round_error(double original, double rounded);
   bool set_fcsr_round64_error(double original, double rounded);
@@ skipping 316 matching lines @@
   static inline void UnregisterCTryCatch(Isolate* isolate) {
     Simulator::current(isolate)->PopAddress();
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_MIPS_SIMULATOR_MIPS_H_