GNU C library 2.33 released

Looking at the PDFs joib so helpfully linked to, the latest level is AVX-512, which AMD has apparently issued no public plans to support. It seems not impossible that AMD will never support AVX-512, and will add its own extensions that GCC wants to support. H. J. Lu, the lead author on the PDF, works for Intel, and none of the authors list amd.com emails; it seems likely they're more tied into Intel's plans than AMD's plans.

From another angle, https://www.extremetech.com/computing/312673-linus-torval... mentions that Atom CPUs don't even support AVX; what happens when Atom CPUs come out with new instructions specialized for low-power ChromeBooks? Or even some specific instructions, like AES enhancements, make their way all the way down the line to Atom CPUs?

Either way, AMD adding its own instructions without supporting AVX-512 or newer instructions making their way down to cheap CPUs with limited AVX support, it seems entirely out of the control of the GNU toolchain people that there are no new instructions they need to support on CPUs that don't support AVX-512.