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namespace Q1.core.Arch;
public static class InstructionSet
{
public static readonly InstructionGroup[] Lookup = new InstructionGroup[128];
static InstructionSet()
{
var nop = new ImplicitInstruction { Name = "NOP", Execute = InstructionSet.Nop };
var nopSimple = new SimpleInstruction { Name = "NOP", Execute = InstructionSet.Nop };
var nopExtended = new ExtendedInstruction { Name = "NOP", Execute = InstructionSet.Nop };
#region Control Group
InstructionSet.Lookup[0x00] = new InstructionGroup
{
Implicit = nop,
SimpleAddressing = new SimpleInstruction { Name = "JMP", Execute = InstructionSet.Jump },
ExtendedImplicit = new ImplicitInstruction { Name = "HALT", Execute = InstructionSet.Halt },
ExtendedAddressing = new ExtendedInstruction { Name = "MOV", Execute = InstructionSet.Move }
};
InstructionSet.Lookup[0x01] = new InstructionGroup
{
Implicit = new ImplicitInstruction { Name = "RET", Execute = InstructionSet.Return },
SimpleAddressing = new SimpleInstruction { Name = "CALL", Execute = InstructionSet.Call },
ExtendedImplicit = new ImplicitInstruction { Name = "SUS", Execute = InstructionSet.Suspend },
ExtendedAddressing = nopExtended
};
InstructionSet.Lookup[0x02] = new InstructionGroup
{
Implicit = new ImplicitInstruction { Name = "BZ(LX)", Execute = InstructionSet.BranchIfZeroLx },
SimpleAddressing = new SimpleInstruction { Name = "BZ", Execute = InstructionSet.BranchIfZero },
ExtendedImplicit = new ImplicitInstruction { Name = "BR", Execute = InstructionSet.Branch },
ExtendedAddressing = nopExtended
};
InstructionSet.Lookup[0x03] = new InstructionGroup
{
Implicit = nop,
SimpleAddressing = new SimpleInstruction { Name = "PUSH", Execute = InstructionSet.Push },
ExtendedImplicit = nop,
ExtendedAddressing = nopExtended
};
InstructionSet.Lookup[0x04] = new InstructionGroup
{
Implicit = nop,
SimpleAddressing = new SimpleInstruction { Name = "POP", Execute = InstructionSet.Pop },
ExtendedImplicit = nop,
ExtendedAddressing = nopExtended
};
#endregion
#region Data Group
InstructionSet.Lookup[0x10] = new InstructionGroup
{
Implicit = new ImplicitInstruction { Name = "INV(DX)", Execute = InstructionSet.InverseDx },
SimpleAddressing = new SimpleInstruction { Name = "INV", Execute = InstructionSet.Inverse },
ExtendedImplicit = nop,
ExtendedAddressing = new ExtendedInstruction { Name = "AND", Execute = InstructionSet.And }
};
InstructionSet.Lookup[0x11] = new InstructionGroup
{
Implicit = nop,
SimpleAddressing = nopSimple,
ExtendedImplicit = nop,
ExtendedAddressing = new ExtendedInstruction { Name = "OR", Execute = InstructionSet.Or }
};
InstructionSet.Lookup[0x12] = new InstructionGroup
{
Implicit = nop,
SimpleAddressing = nopSimple,
ExtendedImplicit = nop,
ExtendedAddressing = new ExtendedInstruction { Name = "XOR", Execute = InstructionSet.Xor }
};
InstructionSet.Lookup[0x13] = new InstructionGroup
{
Implicit = new ImplicitInstruction { Name = "SHPL(DX)", Execute = InstructionSet.ShiftPlaceLeftDx },
SimpleAddressing = new SimpleInstruction { Name = "SHPL", Execute = InstructionSet.ShiftPlaceLeft },
ExtendedImplicit = nop,
ExtendedAddressing = new ExtendedInstruction { Name = "SHL", Execute = InstructionSet.ShiftLeft }
};
InstructionSet.Lookup[0x14] = new InstructionGroup
{
Implicit = new ImplicitInstruction { Name = "SHPR(DX)", Execute = InstructionSet.ShiftPlaceRightDx },
SimpleAddressing = new SimpleInstruction { Name = "SHPR", Execute = InstructionSet.ShiftPlaceRight },
ExtendedImplicit = nop,
ExtendedAddressing = new ExtendedInstruction { Name = "SHL", Execute = InstructionSet.ShiftRight }
};
#endregion
}
private static void Nop(Chip chip, bool word) { /* No operation */ }
private static void Nop(Chip chip, u8 m1, bool word) { /* No operation */ }
private static void Nop(Chip chip, u8 m1, u8 m2, bool word) { /* No operation */ }
#region Control Instructions
private static void Halt(Chip chip, bool word)
{
throw new NotImplementedException("HALT instruction is not implemented yet.");
}
private static void Suspend(Chip chip, bool word)
{
throw new NotImplementedException("SUS instruction is not implemented yet.");
}
private static void Move(Chip chip, u8 m1, u8 m2, bool word)
{
u16 value = chip.Load(m1, word);
chip.Store(m2, value, word);
}
private static void Jump(Chip chip, u8 m1, bool word)
{
u16 address = chip.Load(m1, word);
chip.Pc = address;
}
private static void Call(Chip chip, u8 m1, bool word)
{
u16 targetAddress = chip.Load(m1, word);
chip.Push(chip.Pc);
chip.Pc = targetAddress;
}
private static void Return(Chip chip, bool word)
{
u16 returnAddress = chip.Pop();
chip.Pc = returnAddress;
}
private static void BranchIfZero(Chip chip, u8 m1, bool word)
{
u16 value = chip.Load(m1, word);
if (value == 0)
chip.SkipInstruction();
}
private static void BranchIfZeroLx(Chip chip, bool word)
{
if (chip.Lx == 0)
chip.SkipInstruction();
}
private static void Branch(Chip chip, bool word)
{
chip.SkipInstruction();
}
private static void Push(Chip chip, u8 m1, bool word)
{
u16 value = chip.Load(m1, word);
chip.Push(value);
}
private static void Pop(Chip chip, u8 m1, bool word)
{
u16 value = chip.Pop();
chip.Store(m1, value, word);
}
#endregion
#region Data Instructions
private static void Inverse(Chip chip, u8 m1, bool word)
{
u16 value = chip.Load(m1, word);
value = (u16)~value;
chip.Dx = value;
}
private static void InverseDx(Chip chip, bool word)
{
chip.Dx = (u16)~chip.Dx;
}
#endregion
#region Logic Instructions
#endregion
#region Arithmetic Instructions
#endregion
}
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