Reland "MIPS: Add support for arch. revision 6 to mips32 port."

src/mips/simulator-mips.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 144 matching lines @@
   static Simulator* current(v8::internal::Isolate* isolate);
 
   // Accessors for register state. Reading the pc value adheres to the MIPS
   // architecture specification and is off by a 8 from the currently executing
   // instruction.
   void set_register(int reg, int32_t value);
   void set_dw_register(int dreg, const int* dbl);
   int32_t get_register(int reg) const;
   double get_double_from_register_pair(int reg);
   // Same for FPURegisters.
-  void set_fpu_register(int fpureg, int32_t value);
+  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);
-  int32_t get_fpu_register(int fpureg) const;
-  int64_t get_fpu_register_long(int fpureg) const;
+  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);
 
   // 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;
 
@@ skipping 151 matching lines @@
   // Handle arguments and return value for runtime FP functions.
   void GetFpArgs(double* x, double* y, int32_t* z);
   void SetFpResult(const double& result);
 
   void CallInternal(byte* entry);
 
   // Architecture state.
   // Registers.
   int32_t registers_[kNumSimuRegisters];
   // Coprocessor Registers.
-  int32_t FPUregisters_[kNumFPURegisters];
+  // Note: FP32 mode uses only the lower 32-bit part of each element,
+  // the upper 32-bit is unpredictable.
+  int64_t FPUregisters_[kNumFPURegisters];
   // FPU control register.
   uint32_t FCSR_;
 
   // Simulator support.
   // Allocate 1MB for stack.
   static const size_t stack_size_ = 1 * 1024*1024;
   char* stack_;
   bool pc_modified_;
   int icount_;
   int break_count_;
@@ skipping 55 matching lines @@
 
   static inline void UnregisterCTryCatch() {
     Simulator::current(Isolate::Current())->PopAddress();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_MIPS_SIMULATOR_MIPS_H_