[Bug fortran/106402] New: half preicision is not supported by fortran(real*2).

[Bug fortran/106402] New: half preicision is not supported by fortran(real*2).

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106402

            Bug ID: 106402
           Summary: half preicision is not supported by fortran(real*2).
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: crazylht at gmail dot com
  Target Milestone: ---

Now Intel AVX512_FP16 support half-precision pointing instructions, and c/c++
supports _Float16 type, but it seems fortran real*2 is not supported.

[Bug fortran/106402] half preicision is not supported by gfortran(real*2).

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106402

--- Comment #1 from anlauf at gcc dot gnu.org ---
See also thread at: https://gcc.gnu.org/pipermail/fortran/2022-May/057860.html

[Bug fortran/106402] half preicision is not supported by gfortran(real*2).

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106402

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-11-13
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
                 CC|                            |tkoenig at gcc dot gnu.org
           Severity|normal                      |enhancement

--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
It would make sense to have it, I guess.  If somebody has access
to the relevant hardware, it could also be tested :-)

[Bug fortran/106402] half preicision is not supported by gfortran(real*2).

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106402

--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Thomas Koenig from comment #2)
> It would make sense to have it, I guess.  If somebody has access
> to the relevant hardware, it could also be tested :-)

x86 support _Float16 operations with float instructions for TARGET_SSE2 and
above. So for preliminary validation, any processor with sse2 should be enough.