Initial Commit

src/ExecutorCases.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <cstdint>
+#include <memory>
+#include <array>
+
+struct Instruction;
+class Bus;
+
+struct CPUContext {
+  Instruction& m_Instruction;
+  uint64_t& m_InstructionPointer;
+  uint64_t& m_Flags;
+  uint64_t* m_Registers;
+  std::shared_ptr<Bus> m_Bus;
+
+  CPUContext(Instruction& i, uint64_t& ip, uint64_t& flags, uint64_t* reg, std::shared_ptr<Bus>& bus);
+  ~CPUContext();
+};
+
+enum class ModRMState : uint8_t
+{
+  INVALID = 0,
+  LR = 1,
+  LR_DISP8 = 2,
+  LR_DISP32 = 3,
+  R = 4
+};
+
+struct ModRM{
+  ModRMState m_State;
+  uint8_t m_Reg;
+  uint8_t m_Rm;
+};
+
+typedef void (*ExecutorCase)(CPUContext&);
+
+const std::array<ExecutorCase, 255>& GetExecutorTable();