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.