ports/sysdeps/m68k/fpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   2    Copyright (C) 1997-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21 #include <math.h>
  22
  23 int
  24 __fesetexceptflag (const fexcept_t *flagp, int excepts)
  25 {
  26   fexcept_t fpsr;
  27
  28   /* Get the current status register.  */
  29   __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
  30
  31   /* Install the new exception bits in the Accrued Exception Byte.  */
  32   fpsr &= ~(excepts & FE_ALL_EXCEPT);
  33   fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
  34
  35   /* Store the new status register.  */
  36   __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
  37
  38   /* Success.  */
  39   return 0;
  40 }
  41
  42 #include <shlib-compat.h>
  43 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  44 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
  45 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
  46 #endif
  47
  48 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);