Thanks for the responses!
It'd be unfortunate if AVX10 adoption is desired, yet there's no way to
compile existing 256-bit code to be compatible with it.
Relying on SDE to check the output isn't a particularly viable solution.
It looks like `-mavx512vl -mprefer-vector-width=256` is my best bet
under this design, and hope it works. Fortunately, I'm not relying on
3rd party code here, so I control all intrinsics used.
Something like a `-mmax-vector-width=256` option sounds more preferrable
though, particularly for those using 3rd party code which checks the
`__AVX512VL__` define, and assumes 512-bit vectors are available.
