From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v7 01/15] sched/core: uclamp: Add CPU's clamp buckets
 refcounting
Date: Thu, 14 Mar 2019 14:32:11 +0100
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On Thu, Mar 14, 2019 at 12:13:15PM +0000, Patrick Bellasi wrote:
> > I'd be most impressed if they pull this off. Check the generated code
> > and see I suppose :-)
> 
> On x86 the code generated looks exactly the same:
> 
>    https://godbolt.org/z/PjmA7k

Argh, they do mult by inverse to avoid the division, and can do this
because its a constant.

And then yes, your arm version looks worse.

It does what I expected with -Os, but as Rutland said the other day,
that stands for Optimize for Sadness.