From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 24450 invoked by alias); 1 Sep 2016 15:27:48 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Received: (qmail 24432 invoked by uid 89); 1 Sep 2016 15:27:47 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.3 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RP_MATCHES_RCVD autolearn=ham version=3.3.2 spammy=H*R:D*gnu.org, H*R:D*gcc.gnu.org, H*MI:sk:2016090 X-Spam-User: qpsmtpd, 2 recipients X-HELO: mail3-relais-sop.national.inria.fr Received: from mail3-relais-sop.national.inria.fr (HELO mail3-relais-sop.national.inria.fr) (192.134.164.104) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 01 Sep 2016 15:27:46 +0000 Received: from ip-118.net-89-2-234.rev.numericable.fr (HELO laptop-mg.local) ([89.2.234.118]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Sep 2016 17:27:44 +0200 Date: Thu, 01 Sep 2016 15:27:00 -0000 From: Marc Glisse Reply-To: libstdc++@gcc.gnu.org To: Jonathan Wakely cc: Eelis van der Weegen , libstdc++ , gcc-patches Subject: Re: [patch, libstdc++] std::shuffle: Generate two swap positions at a time if possible In-Reply-To: <20160901151446.GP3342@redhat.com> Message-ID: References: <5728B8CC.7030405@eelis.net> <20160831124502.GH3342@redhat.com> <20160901151446.GP3342@redhat.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-SW-Source: 2016-09/txt/msg00052.txt.bz2 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 ??? -- Marc Glisse