Date: Fri, 9 Mar 2001 18:11:01 -0800 (PST) From: Richard Hodges <rh@matriplex.com> To: freebsd-hackers@FreeBSD.ORG Subject: Re: Kernel area libmish stuff Message-ID: <Pine.BSF.4.10.10103091805250.62467-100000@mail.matriplex.com> In-Reply-To: <200103100130.f2A1UQj39856@earth.backplane.com>
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On Fri, 9 Mar 2001, Matt Dillon wrote:
> You can't safely do FP instructions in the kernel. I do not
> believe the FP context is saved/restored between processes in kernel
> mode, only from user mode. The kernel saves and restores the fp state
> in the few places it uses FP instructions (for memory copying).
> In anycase, I think there'd be a problem here.
The last time I tried using FP in a device driver, it caused kernel
panics (I hate it when that happens...)
-Richard
-------------------------------------------
Richard Hodges | Matriplex, inc.
Product Manager | 769 Basque Way
rh@matriplex.com | Carson City, NV 89706
775-886-6477 | www.matriplex.com
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