sysdeps/ia64/fpu/feholdexcpt.c

   1 /* Store current floating-point environment and clear 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.h>
  20
  21 int
  22 __feholdexcept (fenv_t *envp)
  23 {
  24   fenv_t fpsr;
  25   /* Save the current state.  */
  26   __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (fpsr));
  27   *envp = fpsr;
  28
  29   /* Set the trap disable bits.  */
  30   fpsr |= FE_ALL_EXCEPT;
  31
  32   /* And clear the exception bits.  */
  33   fpsr &= ~(fenv_t) (FE_ALL_EXCEPT << 13);
  34
  35   __asm__ __volatile__ ("mov.m ar.fpsr=%0" :: "r" (fpsr));
  36
  37   /* Success.  */
  38   return 0;
  39 }
  40 libm_hidden_def (__feholdexcept)
  41 weak_alias (__feholdexcept, feholdexcept)
  42 libm_hidden_weak (feholdexcept)