sysdeps/alpha/fpu/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   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 __feclearexcept (int excepts)
  23 {
  24   unsigned long int swcr;
  25
  26   /* Get the current state.  */
  27   swcr = __ieee_get_fp_control ();
  28
  29   /* Clear the relevant bits.  */
  30   swcr &= ~((unsigned long int) excepts & SWCR_STATUS_MASK);
  31
  32   /* Put the new state in effect.  */
  33   __ieee_set_fp_control (swcr);
  34
  35   /* Success.  */
  36   return 0;
  37 }
  38
  39 #include <shlib-compat.h>
  40 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  41 strong_alias (__feclearexcept, __old_feclearexcept)
  42 compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
  43 #endif
  44
  45 libm_hidden_ver (__feclearexcept, feclearexcept)
  46 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);