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Subject: Re: [std-proposals] Rotate Bits Left or Right
From: Walt Karas (wkaras_at_[hidden])
Date: 2020-01-26 11:03:32


Relying on the optimizer seems a viable option:   https://godbolt.org/z/jbJBv3

...
Date: Sun, 26 Jan 2020 09:03:29 +0100
From: "Kjetil Kristoffer Solberg" <post_at_[hidden]>
To: <std-proposals_at_[hidden]>
Subject: [std-proposals] Rotate Bits Left or Right
Message-ID: <003701d5d41f$1a7ef420$4f7cdc60$@ikjetil.no>
Content-Type: text/plain; charset="us-ascii"

Hi!

Shouldn't there be a rotate bits left and rotate bits right operator? The
way I have seen rotate done

is pretty ugly. There are instructions in x86 and other instructions sets
for rotation. Why not have it in the C++ standard?

NB! I have not checked if this question have been asked a million times
before.

Regards

Kjetil


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