From: Richard Henderson <rth@cygnus.com>
To: moshier@mediaone.net, Richard Henderson <rth@cygnus.com>
Cc: Jan Hubicka <hubicka@atrey.karlin.mff.cuni.cz>,
law@cygnus.com, egcs@cygnus.com, Marc Lehmann <pcg@goof.com>
Subject: Re: expand and truncate and 387
Date: Mon, 30 Nov 1998 23:25:00 -0000 [thread overview]
Message-ID: <19981130192827.A26735@dot.cygnus.com> (raw)
In-Reply-To: <Pine.LNX.4.05.9811302127001.6760-100000@moshier.ne.mediaone.net>
On Mon, Nov 30, 1998 at 09:30:41PM -0500, Stephen L Moshier wrote:
>
> Therefore no additional signaling is
> required when the value is already in a register.
>
> Therefore? Suppose the value was loaded for some other operation,
> then the user clears the IEEE flags, then calls for a conversion operation
> on the value that is still in the register. Mustn't there be
> another exception, on the conversion?
I sure _hope_ the user ain't fooling aroung with exception flags
behind my back with asms.
If they do things properly, they'll be making a function call
to feclearexcept (iso c9x <fenv.h>). And since all fp regs
are call-clobbered, there will be no values live in registers.
r~
next prev parent reply other threads:[~1998-11-30 23:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <19981130114618.A1831@dot.cygnus.com>
1998-11-30 20:56 ` Stephen L Moshier
1998-11-30 23:25 ` Richard Henderson
1998-11-30 20:56 ` Stephen L Moshier
1998-11-30 23:25 ` Richard Henderson [this message]
1998-12-01 6:13 ` Stephen L Moshier
1998-12-01 12:51 ` Richard Henderson
1998-12-01 17:59 ` Stephen L Moshier
1998-12-01 17:59 ` Joern Rennecke
1998-11-19 19:37 N8TM
1998-11-20 8:14 ` Stephen L Moshier
-- strict thread matches above, loose matches on Subject: below --
1998-11-09 14:50 Stephen L Moshier
1998-11-19 8:52 ` Jeffrey A Law
1998-11-20 5:20 ` Stephen L Moshier
1998-11-23 16:29 ` Jan Hubicka
1998-11-23 9:01 ` Jeffrey A Law
1998-11-26 0:40 ` Richard Henderson
1998-11-26 6:51 ` Stephen L Moshier
1998-11-26 8:04 ` Jan Hubicka
1998-11-26 17:08 ` Jeffrey A Law
1998-11-26 19:01 ` Stephen L Moshier
1998-11-27 8:53 ` Richard Henderson
1998-11-27 12:46 ` Jan Hubicka
1998-11-27 17:13 ` Stephen L Moshier
1998-11-27 12:46 ` Stephen L Moshier
1998-11-02 0:21 Marc Lehmann
1998-10-27 6:09 Jan Hubicka
1998-10-30 3:25 ` Jeffrey A Law
1998-10-31 2:52 ` Jan Hubicka
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