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/core.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 57 insertions(+), 5 deletions(-)

(limited to 'qtmips_machine/core.h')

diff --git a/qtmips_machine/core.h b/qtmips_machine/core.h
index 2fd0a40..d4523c3 100644
--- a/qtmips_machine/core.h
+++ b/qtmips_machine/core.h
@@ -2,20 +2,72 @@
 #define CORE_H
 
 #include <QObject>
-#include "instruction.h"
+#include "qtmipsexception.h"
 #include "registers.h"
 #include "memory.h"
-#include "programloader.h"
-#include "programmemory.h"
+#include "instruction.h"
+#include "alu.h"
 
 class Core : public QObject {
     Q_OBJECT
 public:
-    Core();
+    Core(Registers *regs, MemoryAccess *mem);
+
+    virtual void step() = 0; // Do single step
 
 signals:
 
-public slots:
+protected:
+    Registers *regs;
+    MemoryAccess *mem;
+
+    struct dtFetch {
+        Instruction inst; // Loaded instruction
+    };
+    struct dtDecode {
+        bool mem2reg; // Write memory output to register (instead alu output)
+        bool memwrite; // If memory should write input
+        bool alubimm; // If b value to alu is immediate value (rt used otherwise)
+        bool regd; // If rd is used (otherwise rt is used for write target)
+        bool regwrite; // If output should be written back to register (which one depends on regd)
+        bool branch; // If this is branch instruction
+        enum AluOp aluop; // Decoded ALU operation
+        std::uint32_t val_rs; // Value from register rs
+        std::uint32_t val_rt; // Value from register rt
+        std::uint8_t val_sa; // Value of sa in instruction it self
+        std::uint16_t val_immediate; // Value of immediate in instruction it self
+    };
+    struct dtExecute {
+        bool mem2reg;
+        std::uint32_t val;
+        // TODO
+    };
+    struct dtMemory {
+        bool mem2reg;
+        // TODO
+        std::uint32_t val;
+    };
+
+    struct dtFetch fetch();
+    struct dtDecode decode(struct dtFetch);
+    struct dtExecute execute(struct dtDecode);
+    struct dtMemory memory(struct dtExecute);
+    void writeback(struct dtMemory);
+
+};
+
+class CoreSingle : public Core {
+public:
+    CoreSingle(Registers *regs, MemoryAccess *mem);
+
+    void step();
+};
+
+class CorePipelined : public Core {
+public:
+    CorePipelined(Registers *regs, MemoryAccess *mem);
+
+    void step();
 };
 
 #endif // CORE_H
-- 
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