From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15301 invoked by alias); 13 Jan 2012 19:45:53 -0000 Received: (qmail 15292 invoked by uid 22791); 13 Jan 2012 19:45:53 -0000 X-SWARE-Spam-Status: No, hits=-1.9 required=5.0 tests=AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from tirion.supremecenter202.com (HELO tirion.supremecenter202.com) (209.25.195.243) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 13 Jan 2012 19:45:40 +0000 Received: from c-e01ee155.46-4-64736c11.cust.bredbandsbolaget.se ([85.225.30.224]:63769 helo=[192.168.0.197]) by tirion.supremecenter202.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1Rln4G-0002dy-B6 for ecos-devel@ecos.sourceware.org; Fri, 13 Jan 2012 19:45:40 +0000 Message-ID: <4F1089DF.4080003@siva.com.mk> Date: Fri, 13 Jan 2012 19:45:00 -0000 From: Ilija Kocho User-Agent: Mozilla/5.0 (X11; Linux i686; rv:9.0) Gecko/20111220 Thunderbird/9.0 MIME-Version: 1.0 To: ecos-devel@ecos.sourceware.org Subject: Re: Gnutools: consideration for upgrade to GCC 4.6 References: <4F106345.4080902@siva.com.mk> <4F108164.8010500@mindspring.com> In-Reply-To: <4F108164.8010500@mindspring.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact ecos-devel-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: ecos-devel-owner@ecos.sourceware.org X-SW-Source: 2012-01/txt/msg00007.txt.bz2 On 13.01.2012 20:09, Frank Pagliughi wrote: > On 01/13/2012 12:00 PM, Ilija Kocho wrote: >> Hi colleagues >> >> Our GCC 4.3.2 is ageing and perhaps we should consider an upgrade. >> My motive is it's lacking of support for Cortex-M4 SIMD (aka DSP) and >> FPU instructions, but I think that other architectures shall gain >> from newer compiler too. I have made some signal processing tests >> with GCC 4.6.2 against current eCos compiler and they show >> performance gain even with Cortex-M3 setting, though moderate. >> Performance is considerable when Cortex-M4 setting is selected and is >> tremendous, as expected, when SIMD are used. Recently introduced >> Cortex-M products with FPU (Kinetis K70, K61, STM32F4) will further >> emphasise the benefit. >> >> Another reason, maybe not so important, is that GCC 4.3 is not >> officially supported any more. >> >> Regarding this, I state my wish that we move to the latest stable GCC >> release, that is at present rel. 4.6.2, accompanied with respective >> binutils. I have tested binutils 2.21 but in meantime 2.22 has been >> released. Of course, the list wouldn't be complete without the latest >> GDB. >> >> Looking forward for your comments. >> Ilija >> > I'm all for it. I've been using 4.6.2 for the last few months for ARM > (EABI, of course) and i386. The 4.3 compilers wouldn't compile some of > the libraries that I use and I didn't want to back port them to an old > compiler. I used binutils 2.21.1. I was using 2.21.1, but toady I tried 2.22. It works out of box, no patching. > > So far I've been very happy, but I was mostly concerned with language > features. The additional Cortex support sells it, though. I'm just > starting to start shopping around for a Cortex-M3 for my next project. If you are happy with ARM7TDMI you'll be happier with Cortex-M Ilija