sysdeps/arm/eabi/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   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 <fpu_control.h>
  22
  23 #include <unistd.h>
  24 #include <ldsodefs.h>
  25 #include <dl-procinfo.h>
  26 #include <asm/procinfo.h>
  27
  28 int
  29 __feclearexcept (int excepts)
  30 {
  31   if (GLRO (dl_hwcap) & HWCAP_VFP)
  32     {
  33       unsigned long int temp;
  34
  35       /* Mask out unsupported bits/exceptions.  */
  36       excepts &= FE_ALL_EXCEPT;
  37
  38       /* Get the current floating point status. */
  39       _FPU_GETCW (temp);
  40
  41       /* Clear the relevant bits.  */
  42       temp = (temp & ~FE_ALL_EXCEPT) | (temp & FE_ALL_EXCEPT & ~excepts);
  43
  44       /* Put the new data in effect.  */
  45       _FPU_SETCW (temp);
  46
  47       /* Success.  */
  48       return 0;
  49     }
  50
  51   /* Unsupported, so fail.  */
  52   return 1;
  53 }
  54
  55 #include <shlib-compat.h>
  56 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  57 strong_alias (__feclearexcept, __old_feclearexcept)
  58 compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
  59 #endif
  60
  61 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);