[Bug math/14173] ynl() returns wrong value for LDBL_MIN

[polacek at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14173

--- Comment #1 from Marek Polacek <polacek at redhat dot com> 2012-05-28 00:04:49 UTC ---
According to Joseph:
"My guess is that the overflow of yn has involved an internal computation
such as Inf - Inf or Inf / Inf that generated NaNs.  It looks rather like
the ynl code that tries to stop this happening is confused about
GET_LDOUBLE_WORDS, which appears to set the sign+exponent value to a
*sign-extended* value (so 0xffffffff not 0xffff for -Inf)."

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