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risc-v-tlm/inc/M_extension.h

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Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
/*!
\file M_extension.h
\brief Implement M extensions part of the RISC-V
\author Màrius Montón
\date November 2018
*/
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef M_EXTENSION__H
#define M_EXTENSION__H
#include "systemc"
#include "extension_base.h"
#include "Log.h"
#include "Registers.h"
typedef enum {
OP_M_MUL,
OP_M_MULH,
OP_M_MULHSU,
OP_M_MULHU,
OP_M_DIV,
OP_M_DIVU,
OP_M_REM,
OP_M_REMU,
OP_M_ERROR
} op_M_Codes;
typedef enum {
M_MUL = 0b000,
M_MULH = 0b001,
M_MULHSU = 0b010,
M_MULHU = 0b011,
M_DIV = 0b100,
M_DIVU = 0b101,
M_REM = 0b110,
M_REMU = 0b111,
} M_Codes;
/**
* @brief Instruction decoding and fields access
*/
class M_extension: public extension_base {
public:
/**
* @brief Constructor, same as base clase
*/
using extension_base::extension_base;
/**
* @brief Decodes opcode of instruction
* @return opcode of instruction
*/
added const keyword to const methods
2021-01-17 22:40:47 +08:00
op_M_Codes decode() const;
Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
override keyword to virtual methods
2021-02-01 18:25:04 +08:00
inline virtual void dump() const override {
Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
std::cout << std::hex << "0x" << m_instr << std::dec << std::endl;
}
added const keyword to const methods
2021-01-17 22:40:47 +08:00
bool Exec_M_MUL() const;
bool Exec_M_MULH() const;
bool Exec_M_MULHSU() const;
bool Exec_M_MULHU() const;
bool Exec_M_DIV() const;
bool Exec_M_DIVU() const;
bool Exec_M_REM() const;
bool Exec_M_REMU() const;
Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
trivial changes to increase performance
2021-01-15 16:09:52 +08:00
bool process_instruction(Instruction *inst);
Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
private:
/**
* @brief Access to opcode field
* @return return opcode field
*/
added const keyword to const methods
2021-01-17 22:40:47 +08:00
inline int32_t opcode() const {
Major refactoring! * A_Instruction, C_Instruction and M_Instruction renamed to *_extension * These files decode and executes extensions * These classes use a new base clase extension_base * Execute & Instruction classes heavyly modified: * Execute now is BASE_ISA and decodes and executes base ISA, Zicsr & Zifencei * Instruction keeps the instruction being executed, nothing else * Add memory interface to ISS to clear the code and the structure * Removed "using namespace " directives, all classes are called using their namespace * Added proper header to each file * Added license to all files
2020-06-02 19:08:38 +08:00
return m_instr.range(14, 12);
}
};
#endif