[Bug libquadmath/65757] gfortran gives incorrect result for anint with real*16 argument

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65757

--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41740
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41740&action=edit
gcc8-pr65757.patch

WIP patch.  There are still many files to do (and this is only before the long
double -> _Float128 changes patch).