[rob74]

Also, AMX = Advanced Matrix Extensions.

Now I wonder how many such "extension packages" Intel (and AMD?) have introduced since MMX (which I believe was the first, and interestingly enough didn't have an official meaning - https://en.wikipedia.org/wiki/MMX_(instruction_set)) in 1997?

[3245t345f345g3]

https://www.sandpile.org/x86/cpuid.htm#leaf_0000_0001h_more

Then click "...details for the "generations" of Intel's vector instructions."

Beware, it's dense acronym soup. :)