libm/metag/feholdexcpt.c

   1 /* Store current floating-point environment and clear exceptions.
   2    Copyright (C) 2013 Imagination Technologies Ltd.
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If
  18    not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21 #include <unistd.h>
  22
  23 #include "internal.h"
  24
  25 int
  26 feholdexcept (fenv_t *envp)
  27 {
  28   unsigned int txdefr;
  29   unsigned int txmode;
  30
  31   __asm__ ("MOV %0,TXDEFR" : "=r" (txdefr));
  32   __asm__ ("MOV %0,TXMODE" : "=r" (txmode));
  33
  34   envp->txdefr = txdefr;
  35   envp->txmode = txmode;
  36
  37   metag_set_fpu_flags(0);
  38
  39   return 0;
  40 }