MIPS64: Optimize simulator.

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 307 matching lines @@
   void TraceMemRd(int64_t addr, int64_t value);
 
   // Operations depending on endianness.
   // Get Double Higher / Lower word.
   inline int32_t GetDoubleHIW(double* addr);
   inline int32_t GetDoubleLOW(double* addr);
   // Set Double Higher / Lower word.
   inline int32_t SetDoubleHIW(double* addr);
   inline int32_t SetDoubleLOW(double* addr);
 
-  // functions called from DecodeTypeRegister
-  void DecodeTypeRegisterCOP1(Instruction* instr, const int32_t rs_reg,
-                              const int64_t rs, const uint64_t rs_u,
-                              const int32_t rt_reg, const int64_t rt,
-                              const uint64_t rt_u, const int32_t rd_reg,
-                              const int32_t fr_reg, const int32_t fs_reg,
-                              const int32_t ft_reg, const int32_t fd_reg,
-                              int64_t& alu_out);
+  // functions called from DecodeTypeRegister.
+  void DecodeTypeRegisterCOP1();
 
-  void DecodeTypeRegisterCOP1X(Instruction* instr, const int32_t fr_reg,
-                               const int32_t fs_reg, const int32_t ft_reg,
-                               const int32_t fd_reg);
+  void DecodeTypeRegisterCOP1X();
 
-  void DecodeTypeRegisterSPECIAL(
-      Instruction* instr, const int32_t rs_reg, const int64_t rs,
-      const uint64_t rs_u, const int32_t rt_reg, const int64_t rt,
-      const uint64_t rt_u, const int32_t rd_reg, const int32_t fr_reg,
-      const int32_t fs_reg, const int32_t ft_reg, const int32_t fd_reg,
-      const int64_t i64hilo, const uint64_t u64hilo, const int64_t alu_out,
-      const bool do_interrupt, const int64_t current_pc, const int64_t next_pc,
-      const int32_t return_addr_reg, const int64_t i128resultH,
-      const int64_t i128resultL);
+  void DecodeTypeRegisterSPECIAL();
 
 
-  void DecodeTypeRegisterSPECIAL2(Instruction* instr, const int32_t rd_reg,
-                                  const int64_t alu_out);
+  void DecodeTypeRegisterSPECIAL2();
 
-  void DecodeTypeRegisterSPECIAL3(Instruction* instr, const int32_t rt_reg,
-                                  const int32_t rd_reg, const int64_t alu_out);
+  void DecodeTypeRegisterSPECIAL3();
 
-  void DecodeTypeRegisterSRsType(Instruction* instr, const int32_t fs_reg,
-                                 const int32_t ft_reg, const int32_t fd_reg);
+  void DecodeTypeRegisterSRsType();
 
-  void DecodeTypeRegisterDRsType(Instruction* instr, const int32_t fs_reg,
-                                 const int32_t ft_reg, const int32_t fd_reg);
+  void DecodeTypeRegisterDRsType();
 
-  void DecodeTypeRegisterWRsType(Instruction* instr, const int32_t fs_reg,
-                                 const int32_t ft_reg, const int32_t fd_reg,
-                                 int64_t& alu_out);
+  void DecodeTypeRegisterWRsType();
 
-  void DecodeTypeRegisterLRsType(Instruction* instr, const int32_t fs_reg,
-                                 const int32_t fd_reg, const int32_t ft_reg);
+  void DecodeTypeRegisterLRsType();
+
   // Executing is handled based on the instruction type.
   void DecodeTypeRegister(Instruction* instr);
 
-  // Helper function for DecodeTypeRegister.
-  void ConfigureTypeRegister(Instruction* instr, int64_t* alu_out,
-                             int64_t* i64hilo, uint64_t* u64hilo,
-                             int64_t* next_pc, int* return_addr_reg,
-                             bool* do_interrupt, int64_t* result128H,
-                             int64_t* result128L);
+  Instruction* currentInstr_;
+  inline Instruction* get_instr() const { return currentInstr_; }
+  inline void set_instr(Instruction* instr) { currentInstr_ = instr; }
+
+  inline int32_t rs_reg() const { return currentInstr_->RsValue(); }
+  inline int64_t rs() const { return get_register(rs_reg()); }
+  inline uint64_t rs_u() const {
+    return static_cast<uint64_t>(get_register(rs_reg()));
+  }
+  inline int32_t rt_reg() const { return currentInstr_->RtValue(); }
+  inline int64_t rt() const { return get_register(rt_reg()); }
+  inline uint64_t rt_u() const {
+    return static_cast<uint64_t>(get_register(rt_reg()));
+  }
+  inline int32_t rd_reg() const { return currentInstr_->RdValue(); }
+  inline int32_t fr_reg() const { return currentInstr_->FrValue(); }
+  inline int32_t fs_reg() const { return currentInstr_->FsValue(); }
+  inline int32_t ft_reg() const { return currentInstr_->FtValue(); }
+  inline int32_t fd_reg() const { return currentInstr_->FdValue(); }
+  inline int32_t sa() const { return currentInstr_->SaValue(); }
+
+  inline void SetResult(const int32_t rd_reg, const int64_t alu_out) {
+    set_register(rd_reg, alu_out);
+    TraceRegWr(alu_out);
+  }
 
   void DecodeTypeImmediate(Instruction* instr);
   void DecodeTypeJump(Instruction* instr);
 
   // Used for breakpoints and traps.
   void SoftwareInterrupt(Instruction* instr);
 
   // Stop helper functions.
   bool IsWatchpoint(uint64_t code);
   void PrintWatchpoint(uint64_t code);
@@ skipping 31 matching lines @@
                            size_t size);
   static CachePage* GetCachePage(v8::internal::HashMap* i_cache, void* page);
 
   enum Exception {
     none,
     kIntegerOverflow,
     kIntegerUnderflow,
     kDivideByZero,
     kNumExceptions
   };
-  int16_t exceptions[kNumExceptions];
 
   // Exceptions.
-  void SignalExceptions();
+  void SignalException(Exception e);
 
   // Runtime call support.
   static void* RedirectExternalReference(void* external_function,
                                          ExternalReference::Type type);
 
   // 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);
@@ skipping 82 matching lines @@
 
   static inline void UnregisterCTryCatch() {
     Simulator::current(Isolate::Current())->PopAddress();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // !defined(USE_SIMULATOR)
 #endif  // V8_MIPS_SIMULATOR_MIPS_H_