From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12308 invoked by alias); 8 Nov 2011 17:14:59 -0000 Received: (qmail 12299 invoked by uid 22791); 8 Nov 2011 17:14:58 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 08 Nov 2011 17:14:45 +0000 From: "marc.glisse at normalesup dot org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/51033] Partial vector extension support Date: Tue, 08 Nov 2011 17:21:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: marc.glisse at normalesup dot org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-11/txt/msg00807.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51033 --- Comment #2 from Marc Glisse 2011-11-08 17:13:39 UTC --- It's probably doable, but it sounds like you have to duplicate all the logic that is currently in the various backends (and some in the C front-end and the middle-end I guess). The shuffle function has a different implementation for all versions of all architectures that provide vectorization. I am not sure how good an idea it is to decide that all this logic has to be coded twice, once for the C vector extension and one for the C++ library, where the 2 codes would be extremely different. Or I probably didn't quite get what you meant. Would you mind giving a few more details on how one would go about implementing it?