From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25752 invoked by alias); 13 Jan 2012 17:01:16 -0000 Received: (qmail 25742 invoked by uid 22791); 13 Jan 2012 17:01:14 -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 17:01:01 +0000 Received: from c-32d8e155.355-1-64736c10.cust.bredbandsbolaget.se ([85.225.216.50]:46799 helo=[192.168.0.120]) by tirion.supremecenter202.com with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1RlkUs-00062g-Sq for ecos-devel@ecos.sourceware.org; Fri, 13 Jan 2012 17:00:59 +0000 Message-ID: <4F106345.4080902@siva.com.mk> Date: Fri, 13 Jan 2012 17:01:00 -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 developers Subject: Gnutools: consideration for upgrade to GCC 4.6 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/msg00003.txt.bz2 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