From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21763 invoked by alias); 13 Feb 2007 18:51:36 -0000 Received: (qmail 21754 invoked by uid 22791); 13 Feb 2007 18:51:36 -0000 X-Spam-Check-By: sourceware.org Received: from mx1.redhat.com (HELO mx1.redhat.com) (66.187.233.31) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 13 Feb 2007 18:51:27 +0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.13.1/8.13.1) with ESMTP id l1DIpPcX026266; Tue, 13 Feb 2007 13:51:25 -0500 Received: from pobox.toronto.redhat.com (pobox.toronto.redhat.com [172.16.14.4]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id l1DIpPhC013826; Tue, 13 Feb 2007 13:51:25 -0500 Received: from touchme.toronto.redhat.com (IDENT:postfix@touchme.toronto.redhat.com [172.16.14.9]) by pobox.toronto.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id l1DIpOYE027651; Tue, 13 Feb 2007 13:51:24 -0500 Received: from ton.toronto.redhat.com (ton.toronto.redhat.com [172.16.14.15]) by touchme.toronto.redhat.com (Postfix) with ESMTP id 859378001CA; Tue, 13 Feb 2007 13:51:24 -0500 (EST) Received: from ton.toronto.redhat.com (localhost.localdomain [127.0.0.1]) by ton.toronto.redhat.com (8.13.1/8.13.1) with ESMTP id l1DIpKsw020738; Tue, 13 Feb 2007 13:51:20 -0500 Received: (from fche@localhost) by ton.toronto.redhat.com (8.13.1/8.13.1/Submit) id l1DIpJ4M020736; Tue, 13 Feb 2007 13:51:19 -0500 Date: Tue, 13 Feb 2007 18:51:00 -0000 From: "Frank Ch. Eigler" To: Joern Rennecke Cc: cgen@sources.redhat.com Subject: Re: delayed branches and zero overhead loops Message-ID: <20070213185118.GA20088@redhat.com> References: <20070213153717.GA12710@elsdt-razorfish.arc.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070213153717.GA12710@elsdt-razorfish.arc.com> User-Agent: Mutt/1.4.1i X-IsSubscribed: yes Mailing-List: contact cgen-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cgen-owner@sourceware.org X-SW-Source: 2007-q1/txt/msg00038.txt.bz2 Hi - > The ARCompact architecture has delay slots and zero overhead loops. > I see that there is already a cgen simulator with delay slots, for > the iq2000. I've looked at its mloop.in xextract-pbb case [...] For what it's worth, my recollection about how the PBB stuff works is so hazy that I won't be able to give quick good advice. Have you considered using a plain non-pbb kernel, where you can hand-code these subtleties in plain C/C++ code? - FChE