Fix Bessel function spurious overflows for ldbl-128 / ldbl-128ibm (bug 15285)

[Andreas Jaeger]

On Sunday, March 17, 2013 20:49:28 Joseph S. Myers wrote:
> Where the Bessel function implementations improve the accuracy of
> their calculations by using cos of twice the input, this requires a
> cut-off to avoid internal overflow when twice the input would
> overflow.  Bug 15285 is the absence of that cut-off in the ldbl-128 /
> ldbl-128ibm implementation.  This patch adds the missing cut-off
> checks and adds testcases that confirm such large inputs are handled
> OK for double and IBM long double.

Thanks, this is fine,
Andreas
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