From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [130.89.2.8] (helo=smtp.utwente.nl) by linuxtogo.org with esmtp (Exim 4.67) (envelope-from ) id 1ImTn0-0005V4-F5 for openembedded-devel@openembedded.org; Mon, 29 Oct 2007 13:32:18 +0100 Received: from Powerbook-2.local (dominion.kabel.utwente.nl [130.89.193.158]) by smtp.utwente.nl (8.12.10/SuSE Linux 0.7) with ESMTP id l9TCORUo013761 for ; Mon, 29 Oct 2007 13:24:27 +0100 Message-ID: <4725D0FB.1040204@student.utwente.nl> Date: Mon, 29 Oct 2007 13:24:27 +0100 From: Koen Kooi User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728) MIME-Version: 1.0 To: openembedded-devel@openembedded.org References: In-Reply-To: X-Enigmail-Version: 0.95.4 X-UTwente-MailScanner-Information: Scanned by MailScanner. Contact helpdesk@ITBE.utwente.nl for more information. X-UTwente-MailScanner: Found to be clean X-UTwente-MailScanner-From: k.kooi@student.utwente.nl X-Spam-Status: No Subject: Re: [oe-commits] org.oe.dev conf/machine/include/tune-ppc405.inc : Move TARGET_FPU = "soft" to the tune file so its X-BeenThere: openembedded-devel@lists.openembedded.org X-Mailman-Version: 2.1.9 Precedence: list Reply-To: openembedded-devel@lists.openembedded.org List-Id: Using the OpenEmbedded metadata to build Distributions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Oct 2007 12:32:19 -0000 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Stelios Koroneos schreef: > Although this is getting OT :) > > Buidling with hardfloat for a cpu that does not have an fpu means that > 1) You need to have a kernel that supports fp emulation (and actually > provides correct fp results) > 2) Have it enabled by default in OE > 3) Be prepared to pay the processing penalty as every fp instruction is > going to generate an exeption that needs to be handled by the kernel. Right, that's how we have done it in OE for the ARMs without FPU for the past 4 years. On ARM it's a 10x-50x slowdown, but still very popular, i.e. debian/arm is still using hardfloat. I'm not saying it makes sense, I'm saying that this is how it has been done for the past 4 years :) regards, Koen -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Darwin) iD8DBQFHJdD7MkyGM64RGpERAiYEAJ9o15AwGFUlIekx/CrlnqVfwhkKFgCgoN4N 7anBacFs+gt5jg0dRLl0aKg= =BOhh -----END PGP SIGNATURE-----