Comment by mort96

I work on games sometimes, where the goal is: "run as fast as possible on everyone's computer, whether it's a 15 year old netbook with an Intel Atom or a freshly built beast of a gaming desktop". As a result, the best approach is to discover supported instructions at runtime and dispatch to a function that's using those instructions (maybe populating a global vector function table at launch?). Next best is to assume some base level vector support (maybe the original AVX for x86, Neon for ARM) and unconditionally use those. Targeting only the latest instruction sets is a complete non-starter.