Hi,
Let me confirm about below just in case.
TRM suggest to check following URL to get more information about C66x core itself.
http://www.ti.com/lit/ug/sprugh7/sprugh7.pdf
This doc is described for both single-precision floating point and double-precision floating point.
However, according to datasheet and TRM, it seems that there is no description about double-precision floating point for DSP of DRA75x.
I believe that C66x.M Unit of DRA75x DSP have double-precision multiply, but could you please confirm that my understanding is correct ?
Best Regards,
Machida