Intel kinda messed up the ISA by requiring AVX-512F across all AVX-512 subsets. If AVX-512VL didn't depend on F, you could have a 256-bit only variant of "AVX-

Intel kinda messed up the ISA by requiring AVX-512F across all AVX-512 subsets. If AVX-512VL didn't depend on F, you could have a 256-bit only variant of "AVX-512". (and instead of making a new feature that allows VL without F, Intel's "solution" seems to be about piecemeal backporting EVEX instructions to VEX (e.g. VNNI, IFMA)) NEON is generally a more "complete" SIMD ISA than SSE/AVX, though it has less "fancy" stuff. AVX-512 fills in a bunch of gaps that was missing in earlier ISAs, but still has odd omissions (like no 8-bit bitwise shift).