RE: Floating point assist exceptions

> due to a floating point calculation routine with a tiny result i got a
> floating point assist exception.
> We use lots of float calculation and I don't want to react individual. I
> dont know what to do in this exception.
> First question: What should be done there in normal (non-SIE) mode ?

This is an abnormal condition, the application code should be structured
(possibly with added tests) so that it does not normally generate these
exceptions.  With that in mind, what the exception handler does depends to
some extent on the system requirements.

For our situation, we chose to have the exception handler set the result
register to 0.0; issue a warning to the operator/system log; and return to
the offending code.

> Second question: What happens,if the SIE Mode (ignores FP exceptions) is
> enabled ?

FP Assist exceptions can still happen, this bit does not disable them.

Randall Young
Senior Software Engineer
NavCom Technology, Inc.
A John Deere Company

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