public void Execute_ShiftsInZeroes()
        {
            reg[17] = 0x12345678;
            reg[18] = 0x8;
            target  = new SllvInstruction(16, 17, 18);

            target.Execute(ref pc, mem, reg);

            Assert.AreEqual(0x34567800, reg[16]);
            Assert.AreEqual(0x4, pc);
        }
        public void ToString_Formatted()
        {
            target = new SllvInstruction(16, 17, 18);

            Assert.AreEqual("SLLV $s0, $s1, $s2", target.ToString());
        }