sysdeps/arm/eabi/fsetexcptflg.c

   1 /* Set floating-point environment exception handling.
   2    Copyright (C) 1997,98,99,2000,01,05 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 General Public License
  16    along with GCC; see the file COPYING.  If not, write to the Free
  17    Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  18    02110-1301, USA.  */
  19
  20 #include <fenv.h>
  21 #include <math.h>
  22 #include <fpu_control.h>
  23
  24 #include <unistd.h>
  25 #include <ldsodefs.h>
  26 #include <dl-procinfo.h>
  27 #include <asm/procinfo.h>
  28
  29 int
  30 __fesetexceptflag (const fexcept_t *flagp, int excepts)
  31 {
  32   if (GLRO (dl_hwcap) & HWCAP_VFP)
  33     {
  34       fexcept_t temp;
  35
  36       /* Get the current environment.  */
  37       _FPU_GETCW (temp);
  38
  39       /* Set the desired exception mask.  */
  40       temp &= ~((excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT);
  41       temp |= (*flagp & excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT;
  42
  43       /* Save state back to the FPU.  */
  44       _FPU_SETCW (temp);
  45
  46       /* Success.  */
  47       return 0;
  48     }
  49
  50   /* Unsupported, so fail.  */
  51   return 1;
  52 }
  53
  54 #include <shlib-compat.h>
  55 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  56 strong_alias (__fesetexceptflag, __old_fesetexceptflag)
  57 compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1);
  58 #endif
  59
  60 versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2);