/* Test that setjmp/longjmp do not save and restore floating-point

   exceptions and rounding modes.

   Copyright (C) 2013-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <setjmp.h>

#include <stdio.h>

#include <stdlib.h>

static jmp_buf __attribute__ ((unused)) env;

static int result = 0;

#if defined FE_TONEAREST && defined FE_TOWARDZERO

static int expected_rounding_mode = FE_TONEAREST;

static void

change_rounding_mode (void)

{

  if (fesetround (FE_TOWARDZERO) == 0)

    expected_rounding_mode = FE_TOWARDZERO;

  else

    puts ("fesetround (FE_TOWARDZERO) failed, continuing test");

  longjmp (env, 1);

}

#endif

#ifdef FE_INVALID

static int expected_exceptions = 0;

static void

raise_exception (void)

{

  if (feraiseexcept (FE_INVALID) == 0)

    expected_exceptions = FE_INVALID;

  else

    puts ("feraiseexcept (FE_INVALID) failed, continuing test");

  longjmp (env, 1);

}

#endif

static int

do_test (void)

{

#if defined FE_TONEAREST && defined FE_TOWARDZERO

  if (fesetround (FE_TONEAREST) == 0)

    {

      if (setjmp (env) == 0)

	change_rounding_mode ();

      else

	{

	  if (fegetround () == expected_rounding_mode)

	    puts ("PASS: longjmp preserved rounding mode");

	  else

	    {

	      puts ("FAIL: longjmp changed rounding mode");

	      result = 1;

	    }

	}

    }

  else

    puts ("fesetround (FE_TONEAREST) failed, not testing rounding modes");

#else

  puts ("rounding mode test not supported");

#endif

#ifdef FE_INVALID

  if (feclearexcept (FE_ALL_EXCEPT) == 0)

    {

      if (setjmp (env) == 0)

	raise_exception ();

      else

	{

	  if (fetestexcept (FE_INVALID) == expected_exceptions)

	    puts ("PASS: longjmp preserved exceptions");

	  else

	    {

	      puts ("FAIL: longjmp changed exceptions");

	      result = 1;

	    }

	}

    }

  else

    puts ("feclearexcept (FE_ALL_EXCEPT) failed, not testing exceptions");

#else

  puts ("exception test not supported");

#endif

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"