Re: [PATCH] arm: Don't require a runtime check function for targets with unconditional NEON

On Tue, Oct 11, 2022 at 4:30 PM Cosmin Truta <[email protected]> wrote:
>
> Actually, I think I'm having a change of mind:
>
> A developer may enable the __ARM_NEON__ codegen at compile time, but
> that is not necessarily an assurance that the intended target machine
> (to be used at run time) is actually Neon-enabled.

D'oh! I take this back. I think that you, Martin, are correct to say
that __ARM_NEON__ is an indication that the compiler may liberally
insert ARM Neon code anywhere, which further means that checking for
ARM Neon hardware availability at run time is futile.

I need to study this more.

> On the other hand, I do agree that the configure script and the cmake
> file should be consistent in their behavior.

... but I do stand behind this other statement.

Sincerely,
Cosmin