sysdeps/powerpc/powerpc32/e500/nofpu/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.  e500 version.
   2    Copyright (C) 1997-2014 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fenv_libc.h>
  20
  21 int
  22 __fesetexceptflag (const fexcept_t *flagp, int excepts)
  23 {
  24   unsigned long old_spefscr, spefscr;
  25   fexcept_t flag;
  26   int excepts_spe = __fexcepts_to_spe (excepts);
  27
  28   /* Get the current state.  */
  29   old_spefscr = fegetenv_register ();
  30
  31   /* Ignore exceptions not listed in 'excepts'.  */
  32   flag = *flagp & excepts_spe;
  33
  34   /* Replace the exception status */
  35   spefscr = (old_spefscr & ~excepts_spe) | flag;
  36
  37   /* Store the new status word (along with the rest of the environment).  */
  38   fesetenv_register (spefscr);
  39
  40   /* If the state of the "invalid" or "underflow" flag has changed,
  41      inform the kernel.  */
  42   if (((spefscr ^ old_spefscr) & (SPEFSCR_FINVS | SPEFSCR_FUNFS)) != 0)
  43     __fe_note_change ();
  44
  45   /* Success.  */
  46   return 0;
  47 }
  48
  49 #include <shlib-compat.h>
  50 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  51 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
  52 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
  53 #endif
  54
  55 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);