not-a-number's

[Andreas Schwab]

Gabriel Paubert <paubert@iram.es> writes:

> Hmm, are you sure that this part is properly implemented in gcc, using
> unordered compare versus ordered compare instructions depending on 
> the operator you use?

For quiet compare operations you need to use isgreater etc.

> At least on PPC, floating point compares always use the unordered 
> instruction (fcmpu) and never the ordered one (fcmpo), so exceptions
> flags are never set. 

The C standard does not place any requirement on < wrt. exceptions or
lack thereof.

Andreas.

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