Different between IAS 39 and IFRS9 about financial asset' impairment

Dear Sir, I confused about what kind of financial assets which will be assessed impairment according to the IAS 39 and IFRS9. Some document I read which said that in IAS 39 only the financial asset at amortized cost will be assessed the impairment, other will not. While IFRS9 show that all the financial asset which both are at amortized cost and at FV through P&L will be assessed the impairment. I am not sure about that, so please help me to solve the problem. Thank you so much