[shash]

> The name, yes, but going by name is a bad idea as the V in AVX also stands for Vector.

Now I get your point after reading more of the linked page. Yes. It is very implementation specific.

One of the things about RVV (and in general any vector ISA) is that the data path can be different enough between different implementations such that specific rules of thumb for hand tuning most probably won’t carry over. As you say it is true of even sufficiently advanced SIMD architectures like AVX.