sysdeps/alpha/fpu/feupdateenv.c

   1 /* Install given floating-point environment and raise exceptions.
   2    Copyright (C) 1997-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv_libc.h>
  20
  21 int
  22 __feupdateenv (const fenv_t *envp)
  23 {
  24   unsigned long int tmp;
  25
  26   /* Get the current exception state.  */
  27   tmp = __ieee_get_fp_control ();
  28
  29   /* Install new environment.  */
  30   __fesetenv (envp);
  31
  32   /* Raise the saved exception.  Incidentally for us the implementation
  33      defined format of the values in objects of type fexcept_t is the
  34      same as the ones specified using the FE_* constants.  */
  35   __feraiseexcept (tmp & SWCR_STATUS_MASK);
  36
  37   /* Success.  */
  38   return 0;
  39 }
  40
  41 #include <shlib-compat.h>
  42 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  43 strong_alias (__feupdateenv, __old_feupdateenv)
  44 compat_symbol (libm, __old_feupdateenv, feupdateenv, GLIBC_2_1);
  45 #endif
  46
  47 libm_hidden_def (__feupdateenv)
  48 libm_hidden_ver (__feupdateenv, feupdateenv)
  49 versioned_symbol (libm, __feupdateenv, feupdateenv, GLIBC_2_2);