From: Florian Weimer <fw@deneb.enyo.de>
Subject: Re: How would Ariane 5 have behaved if overflow checking were not turned off?
Date: Sun, 20 Mar 2011 14:00:49 +0100
Date: 2011-03-20T14:00:49+01:00 [thread overview]
Message-ID: <87y64ac5fi.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: op.vsehqfxolzeukk@jellix.jlfencey.com
* Vinzent Hoefler:
> Florian Weimer wrote:
>
>> It's odd that after all those years, little hard data is available on
>> the defect. The published report uses terminology which is a slightly
>> bit off in the Ada context, so it led only to further speculation.
>
> Hmm? From the report:
>
> |The internal SRI software exception was caused during execution of a
> |data conversion from 64-bit floating point to 16-bit signed integer
> |value. The floating point number which was converted had a value greater
> |than what could be represented by a 16-bit signed integer. This resulted
> |in an Operand Error. The data conversion instructions (in Ada code) were
> |not protected from causing an Operand Error, although other conversions
> |of comparable variables in the same place in the code were protected.
>
> "Operand Error" is what Motorola (now Freescale) just calls it in their
> CPU manual.
"Operand Error" is not the only odd thing. "Protected" operations
which are subject to exception handling are used in Lisp (and, based
on that, Lua). And I think we wouldn't call an expression an
"instruction", either. Without the explicit reference to Ada, I
wouldn't think that this paragraph describes something related to an
Ada program. That's why I think it uses odd language.
next prev parent reply other threads:[~2011-03-20 13:00 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-14 15:49 How would Ariane 5 have behaved if overflow checking were not turned off? Elias Salomão Helou Neto
2011-03-14 16:17 ` KK6GM
2011-03-14 19:25 ` Yannick Duchêne (Hibou57)
2011-03-14 19:28 ` Vinzent Hoefler
2011-03-14 20:28 ` KK6GM
2011-03-15 4:02 ` Yannick Duchêne (Hibou57)
2011-03-15 4:53 ` Shark8
2011-03-14 18:29 ` Vinzent Hoefler
2011-03-16 10:41 ` How would Ariane 5 have behaved if overflow checking were notturned off? robin
2011-03-16 15:16 ` Simon Wright
2011-03-17 11:48 ` robin
2011-03-16 16:58 ` Martin Krischik
2011-03-16 23:39 ` How would Ariane 5 have behaved if overflow checking werenotturned off? robin
2011-03-17 18:48 ` Vinzent Hoefler
2011-03-18 12:06 ` Alex R. Mosteo
2011-03-18 21:15 ` How would Ariane 5 have behaved if overflow checking were not turned off? robin
2011-03-20 10:42 ` Vinzent Hoefler
2011-03-20 17:06 ` How would Ariane 5 have behaved if overflow checking werenotturned off? Martin Krischik
2011-03-20 17:11 ` Martin Krischik
2011-03-20 18:10 ` Dmitry A. Kazakov
2011-03-21 13:24 ` Leif Roar Moldskred
2011-03-20 13:07 ` How would Ariane 5 have behaved if overflow checking were notturned off? Florian Weimer
2011-03-20 17:00 ` Martin Krischik
2011-03-20 20:17 ` Florian Weimer
2011-03-20 20:37 ` Vinzent Hoefler
2011-03-20 20:14 ` Vinzent Hoefler
2011-03-16 18:20 ` Vinzent Hoefler
2011-03-16 18:29 ` Hyman Rosen
2011-03-16 18:55 ` Vinzent Hoefler
2011-03-16 19:40 ` KK6GM
2011-03-16 20:52 ` Hyman Rosen
2011-03-16 21:02 ` KK6GM
2011-03-16 21:09 ` Shark8
2011-03-16 21:13 ` Hyman Rosen
2011-03-16 21:35 ` Shark8
2011-03-16 22:27 ` Vinzent Hoefler
2011-03-16 21:04 ` Shark8
2011-03-16 21:10 ` Hyman Rosen
2011-03-16 21:27 ` KK6GM
2011-03-16 21:31 ` Shark8
2011-03-16 22:32 ` Vinzent Hoefler
2011-03-18 21:14 ` How would Ariane 5 have behaved if overflow checking were not turned off? robin
2011-03-16 23:46 ` How would Ariane 5 have behaved if overflow checking werenotturned off? robin
2011-03-17 0:26 ` Simon Wright
2011-03-17 11:01 ` Georg Bauhaus
2011-03-17 11:04 ` robin
2011-03-17 13:36 ` Niklas Holsti
2011-03-18 21:13 ` How would Ariane 5 have behaved if overflow checking were not turned off? robin
2011-03-19 10:12 ` Niklas Holsti
2011-03-17 22:51 ` How would Ariane 5 have behaved if overflow checking werenotturned off? Vinzent Hoefler
2011-03-18 21:13 ` How would Ariane 5 have behaved if overflow checking were not turned off? robin
2011-03-20 10:42 ` Vinzent Hoefler
2011-03-15 6:28 ` Stephen Leake
2011-03-15 17:32 ` Keith Thompson
2011-03-15 17:40 ` KK6GM
2011-03-15 19:44 ` Robert A Duff
2011-03-15 19:12 ` Florian Weimer
2011-03-15 19:45 ` KK6GM
2011-03-15 19:57 ` Vinzent Hoefler
2011-03-20 13:00 ` Florian Weimer [this message]
2011-03-20 20:13 ` Vinzent Hoefler
2011-03-15 19:42 ` John B. Matthews
2011-03-17 11:44 ` robin
2011-03-17 18:37 ` Vinzent Hoefler
2011-03-17 23:04 ` How would Ariane 5 have behaved if overflow checking were notturned off? robin
2011-03-18 15:55 ` Vinzent Hoefler
2011-03-17 21:37 ` How would Ariane 5 have behaved if overflow checking were not turned off? Vinzent Hoefler
2011-03-16 10:33 ` robin
2011-03-16 15:08 ` Simon Wright
2011-03-17 12:39 ` robin
2011-03-17 13:41 ` Georg Bauhaus
2011-03-17 23:34 ` How would Ariane 5 have behaved if overflow checking were notturned off? robin
2011-03-18 12:57 ` Hyman Rosen
2011-03-18 16:49 ` KK6GM
2011-03-18 17:18 ` Dmitry A. Kazakov
2011-03-19 17:55 ` Keith Thompson
2011-03-20 18:39 ` Robert A Duff
2011-03-17 18:43 ` How would Ariane 5 have behaved if overflow checking were not turned off? Vinzent Hoefler
2011-03-17 20:58 ` Simon Wright
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