C7x has four streaming address generators (SA) that provide zero-overhead address offset calculations for nested loops, similar to VCOP’s Agens. The SAs are similar to the SEs, with the following differences:

• They can be used for both loads and stores.
• They do not offer the same pre-fetch advantage as the SEs.
• They do not have the flexible formatting options that allow seamless emulation of VCOP’s distribution modes.
• The base address is not pre-initialized; therefore SAs can be shared between loads and stores that use the same Agen on VCOP.

After assigning the two SEs to the highest priority loads to SEs, the migration tool assigns the four SAs to the next highest priority loads and stores (perhaps more than four if some share Agens). The process for using SAs is similar to that for SEs in the previous section. The primary difference is that the base address is passed to the access intrinsic rather to the SA_OPEN() call.