[Bug math/15749] cbrtl fails for arguments > 1e308

["gcc.hall at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15749

--- Comment #3 from Jeremy <gcc.hall at gmail dot com> ---
(In reply to joseph@codesourcery.com from comment #2)
> The problem is that ldbl-96 cbrtl calls fabs when it should call fabsl.  
> This will also result in spurious underflows for arguments that underflow 
> doubles.  (It shouldn't cause significantly inaccurate results for other 
> cases - the Newton-Raphson iterations should eliminate any significant 
> consequences of xm being slightly inaccurate.)
> 
> There's a standing issue in the wiki todo list to improve libm-test.inc 
> coverage of large and small input values including subnormals, which would 
> have detected this issue (and I suspect various other bugs not yet found) 
> - currently all finite nonzero test arguments to cbrt have absolute values 
> between 0.001 and 27.

Thanks

I am using the 64-bit version of the library, so perhaps ldbl-128 is affected
too.

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