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Re: when does do_fpe() get called? (or when does FPE happen?)

To: Ralf Baechle <ralf@linux-mips.org>
Subject: Re: when does do_fpe() get called? (or when does FPE happen?)
From: Jun Sun <jsun@mvista.com>
Date: Tue, 28 Jan 2003 09:37:42 -0800
Cc: linux-mips@linux-mips.org, jsun@mvista.com
In-reply-to: <20030128043744.A24686@linux-mips.org>; from ralf@linux-mips.org on Tue, Jan 28, 2003 at 04:37:44AM +0100
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20030127190423.U11633@mvista.com> <20030128043744.A24686@linux-mips.org>
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On Tue, Jan 28, 2003 at 04:37:44AM +0100, Ralf Baechle wrote:
> On Mon, Jan 27, 2003 at 07:04:23PM -0800, Jun Sun wrote:
> 
> > Can someone enlighten me a little?  I am trying
> > to figure out what the FPU state should be (or can be) when
> > we are inside do_fpe() routine.
> 
> Checkout the various flags in $fcr31.  Whenever one of the enabled
> exceptions is triggered we get to handle_fpe via do_fpe.  In addition
> the unimplemented exception can also result in invocation of do_fpe.
>

So it seems safe to assume FPU should have been enabled when we get
here, right?

Jun

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