gcc/testsuite/gcc.c-torture/execute/ieee/fp-cmp-3.c

   1 #include <signal.h>
   2
   3 long double dnan = 1.0l/0.0l - 1.0l/0.0l;
   4 long double x = 1.0l;
   5
   6 void leave ()
   7 {
   8   exit (0);
   9 }
  10
  11 main ()
  12 {
  13 #if ! defined (__vax__) && ! defined (_CRAY)
  14   /* Move this line earlier, for architectures (like alpha) that issue
  15      SIGFPE on the first comparisons. */
  16 #ifndef SIGNAL_SUPPRESS
  17   /* Some machines catches a SIGFPE when a NaN is compared.
  18      Let this test succeed o such machines.  */
  19   signal (SIGFPE, leave);
  20 #endif
  21   /* NaN is an IEEE unordered operand.  All these test should be false.  */
  22   if (dnan == dnan)
  23     abort ();
  24   if (dnan != x)
  25     x = 1.0;
  26   else
  27     abort ();
  28
  29   if (dnan < x)
  30     abort ();
  31   if (dnan > x)
  32     abort ();
  33   if (dnan <= x)
  34     abort ();
  35   if (dnan >= x)
  36     abort ();
  37   if (dnan == x)
  38     abort ();
  39 #endif
  40   exit (0);
  41 }