uclibc-ng/libm/sparc/fesetenv.c

/* Install given floating-point environment.
   Copyright (C) 1997-2025 Free Software Foundation, Inc.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <fenv.h>
#include "fenv_private.h"

int
fesetenv (const fenv_t *envp)
{
  fenv_t dummy;

  /* Put these constants in memory explicitly, so as to cope with a
     -fPIC bug as of gcc 970624.  Making them automatic is quicker
     than loading up the pic register in this instance.  */

  if (envp == FE_DFL_ENV)
    {
      dummy = 0;
      envp = &dummy;
    }
  else if (envp == FE_NOMASK_ENV)
    {
      dummy = 0x1f << 23;
      envp = &dummy;
    }

  __fenv_ldfsr (*envp);

  /* Success.  */
  return 0;
}