sysdeps/m68k/fpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   2    Copyright (C) 1997,99,2000,01 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <fenv.h>
  22 #include <math.h>
  23
  24 int
  25 __fesetexceptflag (const fexcept_t *flagp, int excepts)
  26 {
  27   fexcept_t fpsr;
  28
  29   /* Get the current status register.  */
  30   __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (fpsr));
  31
  32   /* Install the new exception bits in the Accrued Exception Byte.  */
  33   fpsr &= ~(excepts & FE_ALL_EXCEPT);
  34   fpsr |= *flagp & excepts & FE_ALL_EXCEPT;
  35
  36   /* Store the new status register.  */
  37   __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr));
  38
  39   /* Success.  */
  40   return 0;
  41 }
  42
  43 #include <shlib-compat.h>
  44 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  45 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
  46 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
  47 #endif
  48
  49 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);