Check out figures 1 & 5. Best I can tell from skimming, it looks like the command processor and the grid of compute cores both probably use a RISC-V ISA, and t

Check out figures 1 & 5. Best I can tell from skimming, it looks like the command processor and the grid of compute cores both probably use a RISC-V ISA, and the "shader cores" have some custom extensions. It looks very cool, I wonder if they published the RTL anywhere.