The AS9100 standard takes the ISO standard and adds to it, so if you have AS9100 you have fulfilled the ISO9001.
For example, in the ISO9001 7.4.2 Purchasing Information section, it has items a through c. These are required by ISO9001. The AS9100 standard adds item d through i which are required by AS9100. The AS9100 standard adds the new requirements in bold text so you know what was ISO and what is AS9100. Below is what the AS9100 standard looks like using 7.4.2:
c) quality management system requirements,
d) the identification and revision status of specifications, drawings, process requirements, inspection/verification instructions and other relevant technical data,
In all cases, to get the AS9100 certification, you must adhere to everything (both bold and non-bold items).