Date: Thu, 7 Jan 1999 16:46:22 +0000 (GMT) From: Doug Rabson <dfr@nlsystems.com> To: Stuart Anderson <anderson@metrolink.com> Cc: freebsd-ports@FreeBSD.ORG, freebsd-alpha@FreeBSD.ORG Subject: Re: Mesa3 on alpha Message-ID: <Pine.BSF.4.01.9901071641320.391-100000@herring.nlsystems.com> In-Reply-To: <Pine.BSF.3.96.990107105430.10087A-100000@trantor.sc.metrolink.com>
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On Thu, 7 Jan 1999, Stuart Anderson wrote: > On Thu, 7 Jan 1999, Doug Rabson wrote: > > > I think that the right way to go here is to change system compilers to > > something more modern but that would be fairly hard :-) How hard would it > > be to make Mesa3 depend on the egcs port? > > > > For what its worth, RedHat 5.0 (which used gcc 2.7.2.3) built Mesa without > > optimisations. > > 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. -- 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-ports" in the body of the message
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