🚀 go-pugleaf

In article <9106010224.AA28532@ucbvax.Berkeley.EDU> jbs@WATSON.IBM.COM writes:
>
>          I guess I was a bit obscure here.  On IBM hex systems when
>floating overflow occurs the default behavior is for an error message
>to be printed which includes a traceback pointing to the offending
>instruction.  Execution then continues (with the max floating number as
>a fixup) but will terminate if more than a small number (5?) of over-
>flows occur.  I was under the impression that this was typical behavior
>for pre-IEEE systems.  Is that not the case?

Not particularly typical, as other postings have pointed out.

More to the point, what you are describing is the actions of a piece of
user-mode software: the IBM Fortran runtime system. There is nothing in
the IBM/3x0 architecture that specifies these fixup/termination actions;
it just generates a program interrupt. Indeed, doing the fixup involves
grubbing around in the failing instruction to find which floating point
register to modify.

Chris Thompson
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