From owner-freebsd-hackers Tue Jul 17 9:56:23 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from beppo.feral.com (beppo.feral.com [192.67.166.79]) by hub.freebsd.org (Postfix) with ESMTP id 868AC37B405 for ; Tue, 17 Jul 2001 09:56:19 -0700 (PDT) (envelope-from mjacob@feral.com) Received: from wonky.feral.com (wonky.feral.com [192.67.166.7]) by beppo.feral.com (8.11.3/8.11.3) with ESMTP id f6HGuGS32097; Tue, 17 Jul 2001 09:56:17 -0700 (PDT) (envelope-from mjacob@feral.com) Date: Tue, 17 Jul 2001 09:56:13 -0700 (PDT) From: Matthew Jacob Reply-To: To: Terry Lambert Cc: Subject: x86 unaligned access followup. In-Reply-To: <3B5463E1.BE28526C@mindspring.com> Message-ID: <20010717095413.G83710-100000@wonky.feral.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > Actually, since the 486, it's been possible for us to turn on unaligned > access exceptions on the x86. We should probably consider doing this, to > ensure better performance, and to avoid the unnecessary bus overhead we > eat for unaligned access today... not to mention how it could shake out > the drivers. Now *that* is a very cool idea. As Johnny Carson would say "I did not know that". How would this be done? I assume it's some bit-flip for the chip? D'ya have a sample bit 'o code for this? -matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message