am I just not googling well, or is there just no information on apple's GPU's ISAs?
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Well that's gotta make it harder. I know you have a lot of experience porting Linux, ever ported to a system with such little information?
Yes. As part of the PS4 port I black-box reverse engineered the Radeon firmware ISA (F32), and that's without having access to a compiler/tools like I would for the AGX shaders. Just one set of firmware blobs and trying instructions blind.
