From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail1.windriver.com ([147.11.146.13]) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1RuW9N-0005DQ-DQ for openembedded-core@lists.openembedded.org; Mon, 06 Feb 2012 22:31:01 +0100 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca [147.11.189.40]) by mail1.windriver.com (8.14.3/8.14.3) with ESMTP id q16LMx5i005461 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Mon, 6 Feb 2012 13:22:59 -0800 (PST) Received: from Macintosh-5.local (172.25.36.232) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.1.255.0; Mon, 6 Feb 2012 13:22:58 -0800 Message-ID: <4F3044B1.1000705@windriver.com> Date: Mon, 6 Feb 2012 15:22:57 -0600 From: Mark Hatle Organization: Wind River Systems User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:9.0) Gecko/20111222 Thunderbird/9.0.1 MIME-Version: 1.0 To: References: <2025C8A2-8B17-4F99-B4B3-3A0C8EC2C322@dominion.thruhere.net> In-Reply-To: <2025C8A2-8B17-4F99-B4B3-3A0C8EC2C322@dominion.thruhere.net> Subject: Re: armhf support in OpenEmbedded? X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: Patches and discussions about the oe-core layer List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Feb 2012 21:31:01 -0000 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit On 2/6/12 3:17 PM, Koen Kooi wrote: > > Op 6 feb. 2012, om 22:01 heeft Leon Woestenberg het volgende geschreven: > >> Hello, >> >> do we already have support for the ARM "armhf" ABI in OpenEmbedded? (A quick search on the ML didn't get me hits). >> >> Basically,"armhf" is built with -mfloat-abi=hard, and tuned for armv7-a CPUs. > > Yes, we've had it for ages in OE-classic and Marks tune overhaul made it easy to use in OE-core as well. Also note that armhf has practically no adavantage over softfp in real world applications. The only things getting a decent speedup in proper benchmarks was povray. I strongly discourage people from using it. If you don't care about ABI compatibility it might be a few cycles faster.. but it does limit your ability to draw from existing EABI software. (Be it commercial or open source.) (And yes, I realize this is a minor concern for most embedded systems.. but it is an issue.) --Mark > regards, > > Koen > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core