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#ifndef SIGNAL_SUPPRESS

#include <signal.h>

#endif

double dnan = 1.0/0.0 - 1.0/0.0;

double x = 1.0;

void leave ()

{

  exit (0);

}

main ()

{

#if ! defined (__vax__) && ! defined (_CRAY)

  /* Move this line earlier, for architectures (like alpha) that issue

     SIGFPE on the first comparisons. */

#ifndef SIGNAL_SUPPRESS

  /* Some machines catches a SIGFPE when a NaN is compared.

     Let this test succeed o such machines.  */

  signal (SIGFPE, leave);

#endif

  /* NaN is an IEEE unordered operand.  All these test should be false.  */

  if (dnan == dnan)

    abort ();

  if (dnan != x)

    x = 1.0;

  else

    abort ();

  if (dnan < x)

    abort ();

  if (dnan > x)

    abort ();

  if (dnan <= x)

    abort ();

  if (dnan >= x)

    abort ();

  if (dnan == x)

    abort ();

#endif

  exit (0);

}