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From: "fxcoudert at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/107071] gfortran.dg/ieee/modes_1.f90 fails on
 aarch64-linux
Date: Thu, 29 Sep 2022 09:20:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107071

--- Comment #5 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> =
---
Right now the code to test support is indeed like this for glibc targets ex=
cept
x86/x86_64 (libgfortran/config/fpu-glibc.h):


int
support_fpu_rounding_mode (int mode)
{
  switch (mode)
    {
      case GFC_FPE_TONEAREST:
#ifdef FE_TONEAREST
        return 1;
#else
        return 0;
#endif
=E2=80=A6


so the correct code would be instead:


int
support_fpu_rounding_mode (int mode)
{
  int oldmode, res;

  switch (mode)
    {
      case GFC_FPE_TONEAREST:
#ifdef FE_TONEAREST
        oldmode =3D fegetround ();
        res =3D fesetround (FE_TONEAREST);
        fesetround (oldmode);
        return res ? 0 : 1;
#else
        return 0;
#endif
=E2=80=A6



Does that seem correct to you?
Also, looking at the doc, I think this file may need to have this line
somewhere at the top:

#pragma STDC FENV_ACCESS ON=