1 files changed, 57 insertions, 0 deletions
diff --git a/src/CPU.h b/src/CPU.h
new file mode 100644
index 0000000..1ad96aa
--- /dev/null
+++ b/src/CPU.h
@@ -0,0 +1,57 @@
+#pragma once
+
+#include <cstdint>
+#include <memory>
+
+#include "Instruction.h"
+#include "Bus.h"
+#include "ExecutorCases.h"
+#include "CPUContext.h"
+
+enum class CPUExecutionMode {
+  BIT_32,
+};
+
+struct CPUStatus {
+    uint32_t* m_Registers;
+    uint32_t& m_IP;
+    Instruction& m_Instruction;
+};
+
+class CPU {
+public:
+  CPU(std::shared_ptr<Bus>& bus);
+  ~CPU() = default;
+
+public:
+  void Step();
+
+  void Dump();
+  void Reset();
+  
+  bool IsHalted() { return m_IsHalted; }
+
+  CPUStatus GetStatus();
+  
+private:
+  void FetchDecode();
+  void Execute();
+
+private:
+  CPUExecutionMode m_Mode;
+  uint32_t m_Registers[8];
+  uint16_t m_SegmentRegisters[8];
+  uint32_t m_InstructionPointer;
+  uint32_t m_Flags;
+  bool m_IsHalted;
+  
+  std::shared_ptr<Bus> m_Bus;
+
+  Instruction m_Instruction;
+  
+  CPUContext m_Context;
+private:
+  // FetchDecode() must set m_Length before calling FetchModRMFields()
+  void FetchModRMFields(uint8_t modrm);
+  void FetchSIB();
+};