[modeless]

You're right, Microsoft revealed last year in a Hot Chips presentation that HPU v1 is a Cadence Tensilica DSP with custom instructions [1]. Given that, I'd bet that HPU v2's neural net core is Cadence's "Vision C5" [2].

[1] http://www.tomshardware.com/news/microsoft-hololens-hpu-arch...

[2] https://www.cadence.com/content/cadence-www/global/en_US/hom...