github.com/google/highway is arguably such a collection of tricks, the x86_256-inl.h header does emulate some missing AVX-512 instructions such as this one or c

github.com/google/highway is arguably such a collection of tricks, the x86_256-inl.h header does emulate some missing AVX-512 instructions such as this one or compressstoreu. (In this case we currently use a constant.)