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

To: Jun Sun <jsun@mvista.com>
Subject: Re: when does do_fpe() get called? (or when does FPE happen?)
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 28 Jan 2003 04:37:44 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <20030127190423.U11633@mvista.com>; from jsun@mvista.com on Mon, Jan 27, 2003 at 07:04:23PM -0800
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20030127190423.U11633@mvista.com>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.2.5.1i
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.

  Ralf

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