[Bug libgcc/77265] Casting an extended precision long double "inf" to __float128 results in "nan"

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77265

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-08-16
          Component|c                           |libgcc
     Ever confirmed|0                           |1

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
__extendxftf does not convert (clear) explicit lead bit to an implicit.
extended-precision does not utilize implicit/hidden bit.

So, 0x7fff80..0 that represents extended-precision infinity gets converted
directly to 0x7fff80....0 that represents quad-precision NaN.

Confirmed, soft-fp should be fixed.