This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Identify IEE
- From: FX <fxcoudert at gmail dot com>
- To: GCC Development <gcc at gcc dot gnu dot org>
- Cc: Fortran List <fortran at gcc dot gnu dot org>, Uros Bizjak <ubizjak at gmail dot com>
- Date: Wed, 2 Jul 2014 23:13:38 +0200
- Subject: Identify IEE
- Authentication-results: sourceware.org; auth=none
I’ve recently added IEEE support for the Fortran front-end and library. As part of that, the front-end should be able to determine which of the available floating-point types are IEEE-conforming [1]. Right now, I’ve taken a conservative approach and only considered the target’s float_type_node and double_type_node as IEEE modes, but I’d like to improve that (for example, to include long double and binary128 modes on x86).
How can I determine, from a “struct real_format”, whether it is an IEEE format or not? I’ve looked through gcc/real.{h,c} but could find no clear solution. If there is none, would it be okay to add a new bool field to the structure, named “ieee” or “ieee_format”, to discriminate?
Thanks,
FX
[1] The Fortran standard defines such as types as having an "IEC 60559:1989 floating-point format”. Decimal formats are out, as they are unsupported in gfortran, so I guess this definition covers binary16 to binary128, as well as extended and extendable precision formats.