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Date: Sun, 9 Apr 1995 03:42:45 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199504081742.DAA02272@godzilla.zeta.org.au>
To: gwk@cray.com, nate@sneezy.sri.com
Subject: Re: 80387 hangs system at divide by zero
Cc: bugs@FreeBSD.org
Sender: bugs-owner@FreeBSD.org
Precedence: bulk

>Ahh, you have a buggy chip.  :(

>Can you see if your system hangs under DOS with the same thing, cause if
>it does it's time to replace your buggy hardware.  It would be very
>difficult and extremely slow to check every divide to make sure they
>didn't do a divide/zero, so working around such an obvious hardware bug
>is not worth it in terms of performance or in terms of programmer time
>to do it.

Actually it should be possible to use the chip in IEEE mode (with all
exceptions masked).  This should be the default mode, and probably will
be in FreeBSD-2.1.

Bruce