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From: "longb at cray dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95640] gfortran ieee_selected_real_kind returns 10
Date: Thu, 11 Jun 2020 13:34:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95640

--- Comment #1 from Bill Long <longb at cray dot com> ---
The main problem here is that selected_real_kind and ieee_selected_real_kind
have different specifications. The ieee_selected_real_kind requires a KIND
value corresponding to an IEEE floating format, whereas selected_real_kind =
is
only limited to formats supported by the processor, including non-ieee form=
ats,
like the x87 80-bit format.  (Which, apparently, even the Intel compiler no
longer supports.)=20

The expected output from gfortran would be

> gfortran test.f90
> ./a.out
     selected_real_kind(16) =3D 10
ieee_selected_real_kind(16) =3D 16=