1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
#ifndef INSTRUCTION_H
#define INSTRUCTION_H
#include <qstring.h>
#include <qvector.h>
#include "registers.h"
#include "memory.h"
enum InstructionState {
IS_FETCH,
IS_DECODE,
IS_EXECUTE,
IS_MEMORY,
IS_WRITE_BACK,
};
class Instruction {
public:
Instruction();
// TODO return some info for forwarding, stall, flush
virtual void decode(Registers *regs); // Read and prepare instructions
virtual void execute(); // ALU operations
virtual void memory(Memory *mem); // Read or write to memory
virtual void write_back(Registers *regs); // Write results to registers
enum InstructionState state();
bool running();
bool done();
virtual QVector<QString> to_strs() = 0; // Returns all fields of instructions in string
private:
enum InstructionState st;
};
class InstructionR : public Instruction {
public:
InstructionR(std::uint8_t rs, std::uint8_t rd, std::uint8_t rt, std::uint8_t sa);
QVector<QString> to_strs();
protected:
std::uint8_t rs, rd, rt, sa;
};
class InstructionI : public Instruction {
public:
InstructionI(std::uint8_t rs, std::uint8_t rt, std::uint16_t immediate);
QVector<QString> to_strs();
protected:
std::uint8_t rs, rt;
std::uint16_t immediate;
};
class InstructionJ : public Instruction {
public:
InstructionJ(std::uint32_t address);
QVector<QString> to_strs();
protected:
std::uint32_t address;
};
#endif // INSTRUCTION_H
|
