Re: Did clang 14 lose some intrinsics support?

From: Alexander Leidinger <Alexander_at_leidinger.net>
Date: Mon, 26 Sep 2022 13:04:20 UTC 
Quoting Dimitry Andric <dim@freebsd.org> (from Mon, 26 Sep 2022  
12:03:03 +0200):

> Sure, but if you are compiling without -mavx, why would you want the AVX
> intrinsics? You cannot use AVX intrinsics anyway, if AVX is not enabled.
>
> So I don't fully understand the problem this configure scripting is
> supposed to solve?

Think about run time check of available CPU features and then using  
this code for performance critical sections only. Allows to generate  
programs which are generic to all CPUs in the main code paths, and  
able to switch to high performance implementations of critical code  
paths depending on the feature of the CPU.

Bye,
Alexander.

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