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Re: [patch, libstdc++] std::shuffle: Generate two swap positions at a time if possible

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org
Cc: Eelis van der Weegen <eelis at eelis dot net>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 1 Sep 2016 16:35:44 +0100
Subject: Re: [patch, libstdc++] std::shuffle: Generate two swap positions at a time if possible
Authentication-results: sourceware.org; auth=none
References: <ng536o$4iu$1@ger.gmane.org> <ng53cl$4iu$2@ger.gmane.org> <CAH6eHdTnASg7A5USA_sTAHXPfUFmkrZvF27tZUJhj5ywwDVDag@mail.gmail.com> <5728B8CC.7030405@eelis.net> <20160831124502.GH3342@redhat.com> <20160901151446.GP3342@redhat.com> <alpine.DEB.2.20.1609011726420.19176@laptop-mg.saclay.inria.fr>

On 01/09/16 17:27 +0200, Marc Glisse wrote:

On Thu, 1 Sep 2016, Jonathan Wakely wrote:

+	  const __uc_type __comp_range = __swap_range * (__swap_range + 1);


If __swap_range is 3, then __comp_range is 10 and

???


Bah :-)

Thanks. I guess I read the code correctly the other day at least!

References:
- Re: [patch, libstdc++] std::shuffle: Generate two swap positions at a time if possible
  - From: Jonathan Wakely
- Re: [patch, libstdc++] std::shuffle: Generate two swap positions at a time if possible
  - From: Marc Glisse

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