MIPS[64]: Implement fill.df, copy_u.df, copy_s.df instructions in 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 175 matching lines @@
   // Coprocessor registers.
   // Generated code will always use doubles. So we will only use even registers.
   enum FPURegister {
     f0, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11,
     f12, f13, f14, f15,   // f12 and f14 are arguments FPURegisters.
     f16, f17, f18, f19, f20, f21, f22, f23, f24, f25,
     f26, f27, f28, f29, f30, f31,
     kNumFPURegisters
   };
 
+  // MSA registers
+  enum MSARegister {
+    w0,
+    w1,
+    w2,
+    w3,
+    w4,
+    w5,
+    w6,
+    w7,
+    w8,
+    w9,
+    w10,
+    w11,
+    w12,
+    w13,
+    w14,
+    w15,
+    w16,
+    w17,
+    w18,
+    w19,
+    w20,
+    w21,
+    w22,
+    w23,
+    w24,
+    w25,
+    w26,
+    w27,
+    w28,
+    w29,
+    w30,
+    w31,
+    kNumMSARegisters
+  };
+
   explicit Simulator(Isolate* isolate);
   ~Simulator();
 
   // The currently executing Simulator instance. Potentially there can be one
   // for each native thread.
   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.
@@ skipping 13 matching lines @@
   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;
+  template <typename T>
+  void get_msa_register(int wreg, T* value);

[ivica.bogosavljevic, 2017/05/15 15:05:36]

Can we have

T get_msa_register(int wreg) since it has the same signature as other get
functons

[dusan.simicic, 2017/05/16 13:12:41]

No, because "value" is pointer to int[8|16|32|64]_t array, and we use it as dst
address for memcpy. It is possible if we define vector register as new type
(struct/class).

+  template <typename T>
+  void set_msa_register(int wreg, const T* value);
   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);
   bool set_fcsr_round_error(float original, float rounded);
   bool set_fcsr_round64_error(float original, float rounded);
   void round_according_to_fcsr(double toRound, double& rounded,
                                int32_t& rounded_int, double fs);
   void round64_according_to_fcsr(double toRound, double& rounded,
                                  int64_t& rounded_int, double fs);
@@ skipping 69 matching lines @@
     BYTE,
     HALF,
     WORD,
     DWORD,
     FLOAT,
     DOUBLE,
     FLOAT_DOUBLE,
     WORD_DWORD
   };
 
+  // MSA Data Format
+  enum MSADataFormat { MSA_VECT = 0, MSA_BYTE, MSA_HALF, MSA_WORD, MSA_DWORD };
+
   // Read and write memory.
   inline uint32_t ReadBU(int64_t addr);
   inline int32_t ReadB(int64_t addr);
   inline void WriteB(int64_t addr, uint8_t value);
   inline void WriteB(int64_t addr, int8_t value);
 
   inline uint16_t ReadHU(int64_t addr, Instruction* instr);
   inline int16_t ReadH(int64_t addr, Instruction* instr);
   // Note: Overloaded on the sign of the value.
   inline void WriteH(int64_t addr, uint16_t value, Instruction* instr);
   inline void WriteH(int64_t addr, int16_t value, Instruction* instr);
 
   inline uint32_t ReadWU(int64_t addr, Instruction* instr);
   inline int32_t ReadW(int64_t addr, Instruction* instr, TraceType t = WORD);
   inline void WriteW(int64_t addr, int32_t value, Instruction* instr);
   inline int64_t Read2W(int64_t addr, Instruction* instr);
   inline void Write2W(int64_t addr, int64_t value, Instruction* instr);
 
   inline double ReadD(int64_t addr, Instruction* instr);
   inline void WriteD(int64_t addr, double value, Instruction* instr);
 
   // Helper for debugging memory access.
   inline void DieOrDebug();
 
   void TraceRegWr(int64_t value, TraceType t = DWORD);
+  template <typename T>
+  void TraceMSARegWr(T* value, TraceType t);
   void TraceMemWr(int64_t addr, int64_t value, TraceType t);
   void TraceMemRd(int64_t addr, int64_t value, TraceType t = DWORD);
 
   // 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);
@@ skipping 13 matching lines @@
   void DecodeTypeRegisterSPECIAL3();
 
   void DecodeTypeRegisterSRsType();
 
   void DecodeTypeRegisterDRsType();
 
   void DecodeTypeRegisterWRsType();
 
   void DecodeTypeRegisterLRsType();
 
+  int DecodeMsaDataFormat();
+  void DecodeTypeMsaI8();
+  void DecodeTypeMsaI5();
+  void DecodeTypeMsaI10();
+  void DecodeTypeMsaELM();
+  void DecodeTypeMsaBIT();
+  void DecodeTypeMsaMI10();
+  void DecodeTypeMsa3R();
+  void DecodeTypeMsa3RF();
+  void DecodeTypeMsaVec();
+  void DecodeTypeMsa2R();
+  void DecodeTypeMsa2RF();
+
   // Executing is handled based on the instruction type.
   void DecodeTypeRegister();
 
   inline int32_t rs_reg() const { return instr_.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 instr_.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 instr_.RdValue(); }
   inline int32_t fr_reg() const { return instr_.FrValue(); }
   inline int32_t fs_reg() const { return instr_.FsValue(); }
   inline int32_t ft_reg() const { return instr_.FtValue(); }
   inline int32_t fd_reg() const { return instr_.FdValue(); }
   inline int32_t sa() const { return instr_.SaValue(); }
   inline int32_t lsa_sa() const { return instr_.LsaSaValue(); }
+  inline int32_t ws_reg() const { return instr_.WsValue(); }
+  inline int32_t wt_reg() const { return instr_.WtValue(); }
+  inline int32_t wd_reg() const { return instr_.WdValue(); }
 
   inline void SetResult(const int32_t rd_reg, const int64_t alu_out) {
     set_register(rd_reg, alu_out);
     TraceRegWr(alu_out);
   }
 
   inline void SetFPUWordResult(int32_t fd_reg, int32_t alu_out) {
     set_fpu_register_word(fd_reg, alu_out);
     TraceRegWr(get_fpu_register(fd_reg), WORD);
   }
@@ skipping 99 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.
   int64_t registers_[kNumSimuRegisters];
   // Coprocessor Registers.
-  int64_t FPUregisters_[kNumFPURegisters];
+  // Note: FPUregisters_[] array is increased to 64 * 8B = 32 * 16B in
+  // order to support MSA registers
+  int64_t FPUregisters_[kNumFPURegisters * 2];
   // FPU control register.
   uint32_t FCSR_;
 
   // Simulator support.
   // Allocate 1MB for stack.
   size_t stack_size_;
   char* stack_;
   bool pc_modified_;
   int64_t icount_;
   int break_count_;
@@ skipping 62 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_