Time ordering of IEEE-754 exceptions

Fred J. Tydeman tydemanatybor.com
Fri Oct 30 07:19:56 PST 1998


In the C language revision currently in progress,
a IEEE-754 issue has come up.

>From IEEE-754 7.0 Exceptions:  "For each type of 
exception the implementation shall provide a status 
flag that shall be set on any occurrence of the
corresponding exception when no corresponding trap
occurs."

The question the C committe has is:  Does the
computing the default result (one event) and the 
setting of the status flag (the second event) 
happen at the same time?  Or, may the two events 
be split in time and other events happen in between?

I assume that they happen at the same time and
the the committee did not consider this issue.

---
Fred J. Tydeman    +1 (512) 255-8696   Tydeman Consulting
3711 Del Robles    tydemanatybor.com   Programming, testing, numerics
Austin, Texas 78727                    Voting member of J11 (ANSI "C")
USA            Sample C9X+FPCE tests:  ftp://jump.net/pub/tybor/





More information about the Numeric-interest mailing list