sysdeps/s390/fpu/fesetenv.c

   1 /* Install given floating-point environment.
   2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
   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; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv_libc.h>
  21 #include <fpu_control.h>
  22 #include <stddef.h>
  23 #include <asm/ptrace.h>
  24 #include <sys/ptrace.h>
  25 #include <unistd.h>
  26
  27 int
  28 fesetenv (const fenv_t *envp)
  29 {
  30   fenv_t env;
  31
  32   if (envp == FE_DFL_ENV)
  33     {
  34       env.__fpc = _FPU_DEFAULT;
  35       env.__ieee_instruction_pointer = 0;
  36     }
  37   else if (envp == FE_NOMASK_ENV)
  38     {
  39       env.__fpc = FPC_EXCEPTION_MASK;
  40       env.__ieee_instruction_pointer = 0;
  41     }
  42   else
  43     env = (*envp);
  44
  45   _FPU_SETCW (env.__fpc);
  46
  47   /* Success.  */
  48   return 0;
  49 }
  50 libm_hidden_def (fesetenv)