Set errno for y1 overflow (bug 17050)

[Andreas Jaeger]

On 06/12/2014 08:14 PM, Joseph S. Myers wrote:
> This patch fixes bug 17050, missing errno setting for y1 overflow (for
> small positive arguments).  An appropriate check is added for overflow
> directly in the __ieee754_y1 implementation, similar to the check
> present for yn (doing it there rather than in the wrapper also avoids
> yn needing to repeat the check when called for order 1 or -1 and it
> uses __ieee754_y1).
> 
> Tested x86_64 and x86; no ulps update needed.  Also tested for mips64
> to verify the ldbl-128 fix (the ldbl-128ibm code just #includes the
> ldbl-128 file).

Ok, thanks,

Andreas
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