From owner-freebsd-alpha Thu Jan 7 10:46:18 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA20008 for freebsd-alpha-outgoing; Thu, 7 Jan 1999 10:46:18 -0800 (PST) (envelope-from owner-freebsd-alpha@FreeBSD.ORG) Received: from trantor.sc.metrolink.com (trantor.sc.metrolink.com [209.12.162.18]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA20003; Thu, 7 Jan 1999 10:46:16 -0800 (PST) (envelope-from anderson@metrolink.com) Received: from trantor.sc.metrolink.com (trantor.sc.metrolink.com [209.12.162.18]) by trantor.sc.metrolink.com (8.8.8/8.8.8) with SMTP id NAA17687; Thu, 7 Jan 1999 13:45:37 -0500 (EST) (envelope-from anderson@metrolink.com) Date: Thu, 7 Jan 1999 13:45:36 -0500 (EST) From: Stuart Anderson X-Sender: anderson@trantor.sc.metrolink.com To: Doug Rabson cc: freebsd-ports@FreeBSD.ORG, freebsd-alpha@FreeBSD.ORG Subject: Re: Mesa3 on alpha In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 7 Jan 1999, Doug Rabson wrote: > > Does it run OK? When porting OpenGL, I found that egcs was the only compiler > > that would generate correct code for the Alpha. The others would always > > end up SIGFPEs. > > It seems to run most of the tests ok (built non-optimised) but I can't > claim to have actually tested it much. It probably needs to be built with > the software completion flags (-mtrap-precision=i -mfp-trap-mode=su) since > I can imagine generating a few denormalised numbers when rasterising a few > pathological triangles. > > In alpha code, strange SIGFPEs often mean that your program needs software > completion since the chip won't perform calculations which either use or > generate non-finite or denormalised numbers. I found that even with these flags, a few incorrect instructions were generated by gcc 8-(. Stuart Stuart R. Anderson anderson@metrolink.com Metro Link Incorporated South Carolina Office 4711 North Powerline Road 105 Fox Ridge Run Fort Lauderdale, Florida 33309 Lexington, SC 29072 voice: 954.938.0283 voice: 803.951.3630 fax: 954.938.1982 SkyTel: 800.405.3401 http://www.metrolink.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message