From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:49556) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UfvcQ-0006xi-KE for qemu-devel@nongnu.org; Fri, 24 May 2013 13:17:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UfvcI-0006EE-CR for qemu-devel@nongnu.org; Fri, 24 May 2013 13:17:30 -0400 Received: from mail-qc0-x231.google.com ([2607:f8b0:400d:c01::231]:41011) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UfvcI-0006Ds-7m for qemu-devel@nongnu.org; Fri, 24 May 2013 13:17:22 -0400 Received: by mail-qc0-f177.google.com with SMTP id e1so2523873qcy.22 for ; Fri, 24 May 2013 10:17:21 -0700 (PDT) Sender: Richard Henderson Message-ID: <519FA09D.8000108@twiddle.net> Date: Fri, 24 May 2013 10:17:17 -0700 From: Richard Henderson MIME-Version: 1.0 References: <5141F36E.10004@huawei.com> <519DCEC8.8060000@huawei.com> <519DD0BF.4090702@huawei.com> <519E43EE.6090702@twiddle.net> <519F2A8F.6090903@huawei.com> <519F9D11.9020603@twiddle.net> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 2/4] tcg/aarch64: implement new TCG target for aarch64 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: Paolo Bonzini , Jani Kokkonen , Claudio Fontana , qemu-devel@nongnu.org On 05/24/2013 10:08 AM, Peter Maydell wrote: > Where's the waste? The procedure calling standard mandates that we > set FP up, so it's not like we can use it as a general purpose > register anywhere. Well, the calling standard is another document that's not available yet, so obviously I don't know the rationale for that decision. But it does seem like a register performing no useful function... r~