From owner-freebsd-hackers Fri Aug 14 12:46:43 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA29646 for freebsd-hackers-outgoing; Fri, 14 Aug 1998 12:46:43 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from lorraine.loria.fr (lorraine.loria.fr [152.81.1.17]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA29637 for ; Fri, 14 Aug 1998 12:46:34 -0700 (PDT) (envelope-from Olivier.Galibert@loria.fr) Received: from renaissance.loria.fr (renaissance.loria.fr [152.81.4.102]) by lorraine.loria.fr (8.8.7/8.8.7/8.8.7/JCG) with ESMTP id VAA01524; Fri, 14 Aug 1998 21:44:45 +0200 (MET DST) Received: (from galibert@localhost) by renaissance.loria.fr (8.8.2/8.8.2) id VAA09282; Fri, 14 Aug 1998 21:44:41 +0200 (MET DST) Message-ID: <19980814214441.A9271@loria.fr> Date: Fri, 14 Aug 1998 21:44:41 +0200 From: Olivier Galibert To: Warner Losh Cc: hackers@FreeBSD.ORG Subject: Re: 64-bit time_t References: <19980814201233.A8962@loria.fr> <199808141115.FAA21672@lariat.lariat.org> <199808141526.JAA23467@lariat.lariat.org> <19980814201233.A8962@loria.fr> <199808141943.NAA16592@harmony.village.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.91.1i In-Reply-To: <199808141943.NAA16592@harmony.village.org>; from Warner Losh on Fri, Aug 14, 1998 at 01:43:04PM -0600 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, Aug 14, 1998 at 01:43:04PM -0600, Warner Losh wrote: > The R4000 and R5000 (both of which implement MIPS III) are 64 bit as > well. They have 64 bit instructions[*] and registers. Actually, not all R4K. But anyway, "definitively not x86" was the point ;-) > While it is > true that there is a cost associated with snagging bits from memory or > squirting it back to memory, the cache tends to mitigate these effects > somewhat. What's really costly in terms of instructions and register pressure is 64-bits arithmetic on 32-bits architectures. OG. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message