src/ARMeilleure/Decoders/OpCodeAluRs.cs


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namespace ARMeilleure.Decoders
{
    class OpCodeAluRs : OpCodeAlu, IOpCodeAluRs
    {
        public int Shift { get; }
        public int Rm { get; }

        public ShiftType ShiftType { get; }

        public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeAluRs(inst, address, opCode);

        public OpCodeAluRs(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
        {
            int shift = (opCode >> 10) & 0x3f;

            if (shift >= GetBitsCount())
            {
                Instruction = InstDescriptor.Undefined;

                return;
            }

            Shift = shift;

            Rm = (opCode >> 16) & 0x1f;
            ShiftType = (ShiftType)((opCode >> 22) & 0x3);
        }
    }
}