I know dzaima is aware, but for all the other posters who might not be, our Highway library provides all these missing instructions, via emulation if required.

I know dzaima is aware, but for all the other posters who might not be, our Highway library provides all these missing instructions, via emulation if required. I do not understand why folks are still making do with direct use of intrinsics or compiler builtins. Having a library centralize workarounds (such an an MSAN compiler change which hit us last week) seems like an obvious win.