Hacker News Reader

4. The actual instruction set is called SASS. You can view it with Nsight, which can show all 3 levels, CUDA+PTX+SASS:

https://docs.nvidia.com/nsight-visual-studio-edition/3.2/Con...

You can view it, but there's no documentation for it, nor a listing of all instructions. You need to guess what the instructions actually do. Sometimes it's not so difficult, like IADD3; but sometimes it's not at all trivial.

The only "documentation" we have is in the form of the binary utility docs, which has a list of SASS instructions

https://docs.nvidia.com/cuda/cuda-binary-utilities/index.htm...

though there is no guarantee this is exhaustive, no opcodes either (though you could reverse engineer it using cuobjdump -sass and a hex editing like I've been doing). I'm pretty sure some of the instructions in the list are deprecated as well (95% percent sure that PMTRIG does nothing >Volta)

Reply on news.ycombinator.com