sysdeps/arm/eabi/fesetenv.c

   1 /* Install given floating-point environment.
   2    Copyright (C) 2004, 2005 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 __fesetenv (const fenv_t *envp)
  30 {
  31   if (GLRO (dl_hwcap) & HWCAP_VFP)
  32     {
  33       unsigned int temp;
  34
  35       _FPU_GETCW (temp);
  36       temp &= _FPU_RESERVED;
  37
  38       if (envp == FE_DFL_ENV)
  39         temp |= _FPU_DEFAULT;
  40       else if (envp == FE_NOMASK_ENV)
  41         temp |= _FPU_IEEE;
  42       else
  43         temp |= envp->__cw & ~_FPU_RESERVED;
  44
  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 libm_hidden_ver (__fesetenv, fesetenv)
  57 versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);