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Cores are actually general-purpose: not SIMT/warps with expensive branches.

I was trying to figure this out. Where did you find the information confirming that the cores are general purpose. I had inferred that they were GPU like from the use of the openCL programming language. Perhaps ignorantly.

http://www.adapteva.com/introduction/

Each core is a RISC processor with local memory. OpenCL is designed to target heterogeneous architectures and map to whatever compute is available.

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