sysdeps/m68k/fpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   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 #include <math.h>
  21
  22 int
  23 __fesetexceptflag (const fexcept_t *flagp, int excepts)
  24 {
  25   fexcept_t fpsr;
  26
  27   /* Get the current status register.  */
  28   __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
  29
  30   /* Install the new exception bits in the Accrued Exception Byte.  */
  31   fpsr &= ~(excepts & FE_ALL_EXCEPT);
  32   fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
  33
  34   /* Store the new status register.  */
  35   __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
  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 (__fesetexceptflag, __old_fesetexceptflag)
  44 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
  45 #endif
  46
  47 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);