void emulate_Not(Instruction instr)
        {
            var val1 = valueStack.pop();

            if (val1.isInt32())
            {
                valueStack.push(Int32Value.Not((Int32Value)val1));
            }
            else if (val1.isInt64())
            {
                valueStack.push(Int64Value.Not((Int64Value)val1));
            }
            else
            {
                valueStack.pushUnknown();
            }
        }