/* Raise given exceptions.

   Copyright (C) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>

   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, see

   <http://www.gnu.org/licenses/>.  */

#include <fenv.h>

#include <float.h>

#include <math.h>

int

__feraiseexcept (int excepts)

{

  /* Raise exceptions represented by EXCEPTS.  But we must raise only one

     signal at a time.  It is important that if the overflow/underflow

     exception and the divide by zero exception are given at the same

     time, the overflow/underflow exception follows the divide by zero

     exception.  */

  /* First: invalid exception.  */

  if (excepts & FE_INVALID)

    {

      /* One example of an invalid operation is 0 * Infinity.  */

      double d = HUGE_VAL;

      __asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));

    }

  /* Next: division by zero.  */

  if (excepts & FE_DIVBYZERO)

    {

      double d = 1.0;

      __asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));

    }

  /* Next: overflow.  */

  if (excepts & FE_OVERFLOW)

    {

      long double d = LDBL_MAX;

      __asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d));

    }

  /* Next: underflow.  */

  if (excepts & FE_UNDERFLOW)

    {

      long double d = -LDBL_MAX;

      __asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d));

    }

  /* Last: inexact.  */

  if (excepts & FE_INEXACT)

    {

      long double d = 1.0;

      __asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d));

    }

  /* Success.  */

  return 0;

}

#include <shlib-compat.h>

#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)

strong_alias (__feraiseexcept, __old_feraiseexcept)

compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);

#endif

libm_hidden_def (__feraiseexcept)

libm_hidden_ver (__feraiseexcept, feraiseexcept)

versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);