From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KbFvo-0006Kg-ML for qemu-devel@nongnu.org; Thu, 04 Sep 2008 10:35:32 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KbFvm-0006JT-H8 for qemu-devel@nongnu.org; Thu, 04 Sep 2008 10:35:31 -0400 Received: from [199.232.76.173] (port=58323 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KbFvl-0006JI-Uc for qemu-devel@nongnu.org; Thu, 04 Sep 2008 10:35:30 -0400 Received: from hall.aurel32.net ([91.121.138.14]:60131) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1KbFvh-0005x4-CL for qemu-devel@nongnu.org; Thu, 04 Sep 2008 10:35:30 -0400 Received: from junta-icatm144570-bada.red.retevision.es ([62.81.118.18] helo=volta.aurel32.net) by hall.aurel32.net with esmtpsa (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.63) (envelope-from ) id 1KbFve-00030f-Fx for qemu-devel@nongnu.org; Thu, 04 Sep 2008 16:35:22 +0200 Received: from aurel32 by volta.aurel32.net with local (Exim 4.69) (envelope-from ) id 1KbFvb-0003gh-K5 for qemu-devel@nongnu.org; Thu, 04 Sep 2008 16:35:19 +0200 Date: Thu, 4 Sep 2008 16:35:19 +0200 From: Aurelien Jarno Subject: Re: [Qemu-devel] TCG: 128 bit ops? Message-ID: <20080904143519.GA11924@volta.aurel32.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org On Thu, Sep 04, 2008 at 01:10:39PM +0200, Andreas Färber wrote: > Hello, > > Am I correct in seeing that TCG offers no i128 ops? Would this be useful > to add to TCG, internally reusing the i64/i32 code? ppc needs 128-bit > temporaries for Altivec instructions. It uses a union ppc_avr_t of (among > others) two uint64_t. > > Or should I just use two i64 temporaries with a local macro/helper? > It's not used much in ppc but I thought it might be useful to share with > other architectures. > Currently TCG doesn't support i128 ops, but I also agree it would be nice to have it. I think it can benefits for example to sparc64 which has 128-bit fp support. -- .''`. Aurelien Jarno | GPG: 1024D/F1BCDB73 : :' : Debian developer | Electrical Engineer `. `' aurel32@debian.org | aurelien@aurel32.net `- people.debian.org/~aurel32 | www.aurel32.net