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Re: NON FPU cpus - way to go

To: Joe deBlaquiere <jadb@redhat.com>
Subject: Re: NON FPU cpus - way to go
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Date: Thu, 8 Feb 2001 09:45:57 +0100 (MET)
Cc: Jun Sun <jsun@mvista.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>, "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>, Florian Lohoff <flo@rfc822.org>, linux-mips@oss.sgi.com, ralf@oss.sgi.com
In-reply-to: <3A81B388.1090806@redhat.com>
Sender: owner-linux-mips@oss.sgi.com
On Wed, 7 Feb 2001, Joe deBlaquiere wrote:
> Jun Sun wrote:
> > Alan Cox wrote:
> >> Also we missed a trick on the x86 and I want to fix that one day, which is
> >> to have an __fpu ELF segment so if you boot an FPU emu kernel on an fpu
> >> box you regain 47K
> > 
> > 
> > Ironically for MIPS you MUST have the FPU emulater when the CPU actually 
> > has a
> > FPU. :-)
> 
> I'm confused here... why is this?

Because a MIPS CPU may implement only some functionality with some operands,
and decide to throw an `unsupported' exception if the operation is too complex.

Gr{oetje,eeting}s,

                                                Geert

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Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE)
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