Talking (emailing) with an ADI applications engineer... he's VERY good... but, I'm getting frustrated not being able to find ANY good descriptions about how the DAGs are set-up to do DUAL SIMD MAC operations on 40-bit Floating Point variables generated by the PEx/PEy registers on the ADSP-21489.
It seems that no matter what search criteria I use on the ADI Site, or via Google, I get nowhere with my DAG(s), DUAL SIMD MAC operations searches using 40-bit Floating Point variables.
BTW, I think 40-Bit is a GREAT intermediary between SINGLE vs DUAL precision FP and that DUAL SIMD MAC operations are probably the ADI crown jewel... but, there seems to be a dismal-level-of-info on the Data Sheets and other support literature concerning this truly unique, valuable FP hardware. I'm focused on the ADSP-21489 for many reasons, but clearly this question should have general interest, or, am I missing the obvious?
Please tell me where/what I've missed on the ADI site to answer my query.