From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NuZMn-0003LV-H3 for qemu-devel@nongnu.org; Wed, 24 Mar 2010 18:48:01 -0400 Received: from [140.186.70.92] (port=47608 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NuZMl-0003Iq-Va for qemu-devel@nongnu.org; Wed, 24 Mar 2010 18:48:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NuZMi-0007k4-TD for qemu-devel@nongnu.org; Wed, 24 Mar 2010 18:47:59 -0400 Received: from mx20.gnu.org ([199.232.41.8]:44646) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NuZMi-0007jx-QZ for qemu-devel@nongnu.org; Wed, 24 Mar 2010 18:47:56 -0400 Received: from mail.codesourcery.com ([38.113.113.100]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NuZMi-0001ie-71 for qemu-devel@nongnu.org; Wed, 24 Mar 2010 18:47:56 -0400 From: Paul Brook Subject: Re: [Qemu-devel] Re: Compile files only once: some planning Date: Wed, 24 Mar 2010 22:47:53 +0000 References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201003242247.53346.paul@codesourcery.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Blue Swirl , Juan Quintela > Actually, Anthony suggested at some point to just use 64 bits for > TARGET_PHYS_ADDR_BITS and remove the need for hw32/64. > > I think that people emulationg 32bits on 32bits would suffer, but have > no clue how much. Anthony, what was the idea? Sacrificing runtime performance to avoid rebuilding a few files is not acceptable. I consider the fact that TARGET_PHYS_ADDR_BITS is always 64 on 64- bit hosts is a bug. It's just hard to fix, and probably even less of a performance hit, so I haven't bothered yet. Paul