From owner-freebsd-current Mon Jul 12 12:18:18 1999 Delivered-To: freebsd-current@freebsd.org Received: from herring.nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (Postfix) with ESMTP id 9D99314F5A for ; Mon, 12 Jul 1999 12:18:05 -0700 (PDT) (envelope-from dfr@nlsystems.com) Received: from salmon.nlsystems.com (salmon.nlsystems.com [10.0.0.3]) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id UAA01510; Mon, 12 Jul 1999 20:17:33 +0100 (BST) (envelope-from dfr@nlsystems.com) Date: Mon, 12 Jul 1999 20:17:33 +0100 (BST) From: Doug Rabson To: Martin Cracauer Cc: freebsd-current@freebsd.org Subject: Re: Using float emulator on a system with FPU? In-Reply-To: <19990712112802.A4800@cons.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 12 Jul 1999, Martin Cracauer wrote: > Moin, > > I'm going to work on FreeBSD's floating point support, but I need to > test my changes on systems using the FPU emulators (non-GPL and GPL). > > Is there any way to use these emulators on a system that has a > hardware FPU? > > Guessing from LINT's comments, you had to leave out npx and include > one of the emulators, but -current's config refuses to config a kernel > file without npx support. > > I also tried to add "disable" to npx's config line, which compiles and > runs ok, but still uses the hardware FPU (timing and exception test). You might consider looking at the fp emulator which I wrote for the alpha. It should be accurate (I tested against the fpu on an x86) and contains test harness code which can be used to play with it on both x86 and alpha. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message