From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:39080) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UM3Bp-0000D6-Df for qemu-devel@nongnu.org; Sat, 30 Mar 2013 17:19:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UM3Bk-0006ps-TJ for qemu-devel@nongnu.org; Sat, 30 Mar 2013 17:19:53 -0400 Received: from mail-pa0-f47.google.com ([209.85.220.47]:49477) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UM3Bk-0006pk-NL for qemu-devel@nongnu.org; Sat, 30 Mar 2013 17:19:48 -0400 Received: by mail-pa0-f47.google.com with SMTP id bj3so788974pad.6 for ; Sat, 30 Mar 2013 14:19:48 -0700 (PDT) Sender: Richard Henderson Message-ID: <515756EE.8070308@twiddle.net> Date: Sat, 30 Mar 2013 14:19:42 -0700 From: Richard Henderson MIME-Version: 1.0 References: <1364676207-21516-1-git-send-email-rth@twiddle.net> <1364676207-21516-2-git-send-email-rth@twiddle.net> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH v4 01/18] tcg-arm: Fix local stack frame List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: qemu-devel@nongnu.org, Aurelien Jarno On 2013-03-30 14:14, Peter Maydell wrote: > If you're doing a sub sp, sp, #n anyway, you might as well > add 4 to that and drop the save/load of r12 from the stmdb/ldmia. > It was only in there to save having an extra sub/add insn. Fair enough, not that it ought to make a difference to the cycle count. r~