[FEATURE] a named function for broadcasting a value

[DenisYaroshevskiy]

The syntax we are using eve::wide<T>(v) can be confusing in certain scenarious.

Like

eve::wide<T> x(ptr);
eve::wide<T> x(*ptr);

mean different things.

I would like a function, that a person not familiar with eve can easily understand

[jfalcou]

auto x   = widen(4);
auto x8 = widen(4, lane<8>);

What about this name ? We WIDEN the scalar and get a wide

[DenisYaroshevskiy]

I think that is wqy too cute. We use the word splat already. Broadcast is also a good one

[jfalcou]

we use splat as a decorator. We can make the decorator splatted ? and reuse splat as a function ?

[jfalcou]

won't broadcast conflict with the shuffle or are we OK overlaoding broadcast for both ?

[DenisYaroshevskiy]

We can do either or I think? I don't know which is better.

[jfalcou]

People probably knows broadcast already

[DenisYaroshevskiy]

Broadcast it is then

[DenisYaroshevskiy]

a shuffle is actually called broadcast_lane
https://jfalcou.github.io/eve/group__core__named__shuffles_ga511d8b336d54331461e09e61373e37de.html#ga511d8b336d54331461e09e61373e37de

[jfalcou]

OK so we want to overlaod this one

https://jfalcou.github.io/eve/group__core__simd_gaa8fb67b18a0c3046d9281ed21953444d.html#gaa8fb67b18a0c3046d9281ed21953444d