From mint-bounce@lists.fishpool.fi  Sun Oct  5 18:13:34 2008
From: Andreas Schwab <schwab@suse.de>
To: Vincent =?iso-8859-1?Q?Rivi=E8re?= <vincent.riviere@freesbee.fr>
Cc: mint <mint@fishpool.com>
Subject: Re: [MiNT] Some comments on gcc 4.3.2
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X-Yow: YOW!!  Now I understand advanced MICROBIOLOGY
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Date: Mon, 06 Oct 2008 00:10:56 +0200
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Vincent Rivière <vincent.riviere@freesbee.fr> writes:

> I was thinking that FPU calls were always F-instructions...
> Are the FPU instructions different between 68000+68881, 68030+68881 and
> 68RC040 ?
> What do you mean by special addressing for the 68000 ?

The 68000 does not have the coprocessor interface, and treats every
line-f instruction as illegal instruction.  The 68881 is addressed like
any other mmio device, and the coprocessor protocol has to be
implemented in software (eg. in the line-f exception handler).

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."