From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christopher Li <sparse@chrisli.org>
Subject: Re: [PATCH v2 6/8] transform (A & M) >> S to (A >> S) & (M >> S)
Date: Mon, 7 Aug 2017 21:50:56 -0400
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To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>, Dibyendu Majumdar <mobile@majumdar.org.uk>, Linux-Sparse <linux-sparse@vger.kernel.org>

On Mon, Aug 7, 2017 at 9:00 PM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> But even in the absence of such further simplification, the smaller
> constant thing likely makes it worth it. Almost all architectures have
> an easier time with smaller constants, and doing
>
>    (a >> 24) & 255;
>
> is often noticeably more efficient than
>
>    (a & 0xff000000) >> 24;
>
> just because of the constant issue.

That totally make sense.

Thanks

Chris