&gt; the paper mentions in the conclusion that a SASS spec is not publicly available. It would be interesting for someone involved to comment more on that. Experiments on reverse engineering the compiled PTX results?<p>I&#x27;m one of the people implementing this stuff in upstream clang&#x2F;llvm.<p>I&#x27;m not aware of any experiments internal or otherwise where we&#x27;ve tried to compile to SASS.  We believe that there would be some performance gains to be had, but it&#x27;s a really big project, even if we had an ISA, which at the moment we do not.