ports/sysdeps/arm/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 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 __fesetenv (const fenv_t *envp)
  29 {
  30   if (GLRO (dl_hwcap) & HWCAP_ARM_VFP)
  31     {
  32       unsigned int temp;
  33
  34       _FPU_GETCW (temp);
  35       temp &= _FPU_RESERVED;
  36
  37       if (envp == FE_DFL_ENV)
  38         temp |= _FPU_DEFAULT;
  39       else if (envp == FE_NOMASK_ENV)
  40         temp |= _FPU_IEEE;
  41       else
  42         temp |= envp->__cw & ~_FPU_RESERVED;
  43
  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 libm_hidden_ver (__fesetenv, fesetenv)
  56 versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);