9.300 frexp

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/frexp.html

Gnulib module: frexp

Portability problems fixed by Gnulib:

• This function does not work on denormalized numbers on some platforms: NetBSD 3.0.
• This function does not work on negative zero on some platforms: NetBSD 4.99, MSVC 9.
• This function does not work on infinite numbers on some platforms: IRIX 6.5, mingw, MSVC 9.

Portability problems not fixed by Gnulib: