[Bug fortran/32049] New: Support on x86_64 also kind=16

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

It would be great if kind=16 could also be supported on x86_64 besides the
kinds 4, 8 and 10. With this some legacy code could be run and we would catch
up with ifort, which support kind 4, 8 and 16. (16 with software emulation.)

Problems:
- software fp is still a bit incomplete
- Supporting kind = 10 and kind = 16 at the same time is not supported by
libgfortran.

For the current software floating point support, see:
http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01490.html
http://gcc.gnu.org/ml/gcc-patches/2007-04/msg00728.html

Support for __float128 (TFmode) IEEE quad type is
available via soft-fp library on x86_64 targets.  The
support includes basic arithmetic operations (addition, subtraction,
negation, multiplication and division of __float128</code>
values), full set of IEEE comparisons between <code>__float128</code>
values, conversions to and from <code>float</code>, <code>double</code>
and <code>long double</code> floating point types, as well as
conversions to and from <code>signed</code> or
unsigned integer, signed or unsigned long integer and signed or
unsigned quad integer (TImode) types.  Additionally, all
operations generate full set of IEEE exceptions and support full set
of IEEE rounding modes.


-- 
           Summary: Support on x86_64 also kind=16
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32049