not-a-number's

[Andreas Schwab]

Richard Biener <richard.guenther@gmail.com> writes:

> You can enable FP exceptions via fpsetexceptflag and friends (it's disabled
> in the FPU by default) and if you then make sure to compile with
> -fsignalling-nans (that's not the default) you will get the desired behavior
> (program termination via an exception).

That will only work with SNaN, and only for input operands, since the
FPU will never generate SNaN on its own.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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