https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95640
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
Depends on| |69101
--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to Bill Long from comment #0)
> > cat test.f90
> Gfortran:
>
> > module swap PrgEnv-intel PrgEnv-gnu
> > gfortran test.f90
> > ./a.out
> selected_real_kind(16) = 10
> ieee_selected_real_kind(16) = 10
>
> The output from gfortran is problematic because ieee_selected_real_kind
> should not return 10. If the users want KIND=10 (i.e. the
> Intel-proprietary 80-bit x87 floats), then they need to use
> selected_real_kind and not the IEEE version.
IEEE-754 permits the extended double type (See 3.7 Extended and
extendable precisions). I do not see in the Fortran standard that
the output from ieee_seleted_real_kind must select binary32,
binary64, or binary128.
That said, ieee_selected_real_kind is completely broken.
See PR69101. I used to have patch that fixed this PR,
but never got around to committing it. The patch attached
in 69101 is not correct.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69101
[Bug 69101] [F03] IEEE_SELECTED_REAL_KIND is not generic
