From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,885dab3998d28a4 X-Google-Attributes: gid103376,public From: Ken Garlington Subject: Re: Ariane 5 failure Date: 1996/10/18 Message-ID: <326782F7.7D5E@lmtas.lmco.com>#1/1 X-Deja-AN: 190418587 references: <96100111162774@psavax.pwfl.com> <32555A39.E38@lmtas.lmco.com> <326506D2.1E40@lmtas.lmco.com> content-type: text/plain; charset=us-ascii organization: Lockheed Martin Tactical Aircraft Systems mime-version: 1.0 newsgroups: comp.lang.ada x-mailer: Mozilla 2.02 (Macintosh; I; 68K) Date: 1996-10-18T00:00:00+00:00 List-Id: Keith Thompson wrote: > > In <326506D2.1E40@lmtas.lmco.com> Ken Garlington writes: > [...] > > Not necessarily. Keep in mind that an exception _was_ raised -- a > > predefined exception (Operand_Error according to the report). > > This is one thing that's confused me about this report. There is no > predefined exception in Ada called Operand_Error. Either the overflow > raised Constraint_Error (or Numeric_Error if they were using an Ada > 83 compiler that doesn't follow AI-00387), or a user-defined exception > called Operand_Error was raised explicitly. It confused me too. I'm guessing that language differences are part of the answer here, but I have no idea. It's also possible that the CPU hardware specification has something called an "Operand Error" interrupt which is generated during an overflow, which I assume gets mapped into Constraint_Error (as is common with the MIL-STD-1750 CPU, for instance). I also world be interested in any information about "Operand_Error". > > -- > Keith Thompson (The_Other_Keith) kst@thomsoft.com <*> > TeleSoft^H^H^H^H^H^H^H^H Alsys^H^H^H^H^H Thomson Software Products > 10251 Vista Sorrento Parkway, Suite 300, San Diego, CA, USA, 92121-2706 > FIJAGDWOL -- LMTAS - "Our Brand Means Quality" For more info, see http://www.lmtas.com or http://www.lmco.com