ChocolArm64/Decoders/OpCodeMov64.cs


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using ChocolArm64.Instructions;
using ChocolArm64.State;

namespace ChocolArm64.Decoders
{
    class OpCodeMov64 : OpCode64
    {
        public int  Rd  { get; private set; }
        public long Imm { get; private set; }
        public int  Pos { get; private set; }

        public OpCodeMov64(Inst inst, long position, int opCode) : base(inst, position, opCode)
        {
            int p1 = (opCode >> 22) & 1;
            int sf = (opCode >> 31) & 1;

            if (sf == 0 && p1 != 0)
            {
                Emitter = InstEmit.Und;

                return;
            }

            Rd  = (opCode >>  0) & 0x1f;
            Imm = (opCode >>  5) & 0xffff;
            Pos = (opCode >> 21) & 0x3;

            Pos <<= 4;
            Imm <<= Pos;

            RegisterSize = (opCode >> 31) != 0
                ? State.RegisterSize.Int64
                : State.RegisterSize.Int32;
        }
    }
}