/* Install given floating-point environment.   Copyright (C) 2000, 2002 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <fenv_libc.h>#include <fpu_control.h>#include <stddef.h>#include <asm/ptrace.h>#include <sys/ptrace.h>#include <unistd.h>intfesetenv (const fenv_t *envp){  fenv_t env;  if (envp == FE_DFL_ENV)    {      env.fpc = _FPU_DEFAULT;      env.ieee_instruction_pointer = 0;    }  else if (envp == FE_NOMASK_ENV)    {      env.fpc = FPC_EXCEPTION_MASK;      env.ieee_instruction_pointer = 0;    }  else    env = (*envp);  /* The S/390 IEEE fpu doesn't have a register for the ieee     instruction pointer. The operating system is required to keep an     instruction pointer on a per process base. We read and write this     value with the ptrace interface.  */  _FPU_SETCW (env.fpc);  ptrace (PTRACE_POKEUSER, getpid (), PT_IEEE_IP,	  env.ieee_instruction_pointer);  /* Success.  */  return 0;}libm_hidden_def (fesetenv)