From f0ad502e4651243d6a96194b3393bd460c0f7fc9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Sun, 19 Nov 2017 21:23:04 +0100
Subject: Another huge pile of work for about two months

Well I should commit every change instead of this madness. I am not
documenting changes as all this is just improvements and implementation
progression.
---
 qtmips_machine/instruction.h | 66 +++++++++++---------------------------------
 1 file changed, 16 insertions(+), 50 deletions(-)

(limited to 'qtmips_machine/instruction.h')

diff --git a/qtmips_machine/instruction.h b/qtmips_machine/instruction.h
index 8c5ede9..3b76fba 100644
--- a/qtmips_machine/instruction.h
+++ b/qtmips_machine/instruction.h
@@ -2,64 +2,30 @@
 #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();
+    Instruction(std::uint32_t inst);
+    Instruction(std::uint8_t opcode, std::uint8_t rs, std::uint8_t rt, std::uint8_t rd, std::uint8_t shamt, std::uint8_t funct); // Type R
+    Instruction(std::uint8_t opcode, std::uint8_t rs, std::uint8_t rt, std::uint16_t immediate); // Type I
+    Instruction(std::uint8_t opcode, std::uint32_t address); // Type J
 
-    // 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
+    QString to_str();
 
-    enum InstructionState state();
-    bool running();
-    bool done();
+    std::uint8_t opcode() const;
+    std::uint8_t rs() const;
+    std::uint8_t rt() const;
+    std::uint8_t rd() const;
+    std::uint8_t shamt() const;
+    std::uint8_t funct() const;
+    std::uint16_t immediate() const;
+    std::uint32_t address() const;
+    std::uint32_t data() const;
 
-    virtual QVector<QString> to_strs() = 0; // Returns all fields of instructions in string
+    bool operator ==(const Instruction &c) const;
 
 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;
+    std::uint32_t dt;
 };
 
 #endif // INSTRUCTION_H
-- 
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