What is the better signature for this?

[Bruce Carneal]

On Sunday, 9 October 2022 at 19:44:13 UTC, Guillaume Piolat wrote:
> Consider the following "intrinsic" signature.
>
> ...
>
> What do you think is the better signature?
> I'd prefer to go A > B > C, but figured I might be missing 
> something.

Could using the static array representation type of the vector 
(.array) be a useful idiom here?  I ask because I don't know the 
constraints/preferences of veteran intrinsic programmers.  That 
idiom does work well in other SIMD formulations but may not be 
well suited here.