[Bug 1001539] Single precision floating point math library

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001539

--- Comment #31 from Ilija Kocho <ilijak@siva.com.mk> ---
(In reply to comment #30)
> (In reply to comment #29)
> > 
> > I'm referring to actual code Ref:float/ieee754_api/wf_asinf.c
> > if (|x| > 1) POSIX mode sets errno = EDOM indeed, but returns 0 rather than
> > NaN.
> 
> It's not required to return NaN. In fact the slightly older POSIX standard
> I've got here (not online) says that more explicitly:
> 
> "If the value of x is not in the range [â1,1], and is not ÂInf or NaN,
> either 0.0 or NaN shall be returned and errno shall be set to [EDOM].
> 
> If x is NaN, NaN shall be returned and errno may be set to [EDOM].
> 
> If x is ÂInf, either 0.0 shall be returned and errno set to [EDOM], or NaN
> shall be returned and errno may be set to [EDOM]."
> 
> I assume in the more recent standard they decided to make it more general -
> not necessarily 0.0 but any value as long as it's implementation-defined.
> But that can certainly be 0.0.

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