ports/sysdeps/arm/fclrexcpt.c

   1 /* Clear given exceptions in current floating-point environment.
   2    Copyright (C) 1997,98,99,2000,01,05,11 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.h>
  20 #include <fpu_control.h>
  21
  22 #include <unistd.h>
  23 #include <ldsodefs.h>
  24 #include <dl-procinfo.h>
  25 #include <sysdep.h>
  26
  27 int
  28 __feclearexcept (int excepts)
  29 {
  30   if (GLRO (dl_hwcap) & HWCAP_ARM_VFP)
  31     {
  32       unsigned long int temp;
  33
  34       /* Mask out unsupported bits/exceptions.  */
  35       excepts &= FE_ALL_EXCEPT;
  36
  37       /* Get the current floating point status. */
  38       _FPU_GETCW (temp);
  39
  40       /* Clear the relevant bits.  */
  41       temp = (temp & ~FE_ALL_EXCEPT) | (temp & FE_ALL_EXCEPT & ~excepts);
  42
  43       /* Put the new data in effect.  */
  44       _FPU_SETCW (temp);
  45
  46       /* Success.  */
  47       return 0;
  48     }
  49
  50   /* Unsupported, so fail unless nothing needs to be done.  */
  51   return (excepts != 0);
  52 }
  53
  54 #include <shlib-compat.h>
  55 #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
  56 strong_alias (__feclearexcept, __old_feclearexcept)
  57 compat_symbol (libm, __old_feclearexcept, feclearexcept, GLIBC_2_1);
  58 #endif
  59
  60 versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2);