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Re: FreeBSD 3.x
- To: law at cygnus dot com
- Subject: Re: FreeBSD 3.x
- From: Donn Terry <donn at interix dot com>
- Date: Mon, 07 Jun 1999 09:39:15 -0600
- CC: Alfred Perlstein <bright at rush dot net>, egcs at egcs dot cygnus dot com
- References: <19462.928632232@upchuck.cygnus.com>
Jeffrey A Law wrote:
>
> In message <Pine.BSF.3.96.990604130517.9491M-100000@cygnus.rush.net>you write
> :
> > Since no one has responded, I'd like a crack at it.
> >
> > I assume this is with the most recent snapshots?
> Yes. The gcc-2.95 prerelease snapshots.
>
> A variety of folks have mentioned the possibility that freebsd & linux
> might set up the FP unit differently. If so that might explain the
> rbug failure (and a couple others that I haven't investigated yet).
*IF* they do, it helps explain it: setting the FP control register
right makes many of the aspects of rbug.c come and go, depending
on the actual setting. (But neither setting alone is a complete fix.)
> Some folks have donated code fragments which would allow me to peek at
> the fp control register. I'll probably do that sometime after I get back
> to SLC.
It's a trivial little asm, if nothing else, and also included in
the rbug.c patch for informational purposes (in the testcase,
#ifdef-ed).
Donn
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