gcc/testsuite/gcc.dg/torture/floatn-nan.h

/* Tests for _FloatN / _FloatNx types: compile and execution tests for
   NaNs.  Before including this file, define WIDTH as the value N;
   define EXT to 1 for _FloatNx and 0 for _FloatN.  */

#define CONCATX(X, Y) X ## Y
#define CONCAT(X, Y) CONCATX (X, Y)
#define CONCAT3(X, Y, Z) CONCAT (CONCAT (X, Y), Z)
#define CONCAT4(W, X, Y, Z) CONCAT (CONCAT (CONCAT (W, X), Y), Z)

#if EXT
# define TYPE CONCAT3 (_Float, WIDTH, x)
# define CST(C) CONCAT4 (C, f, WIDTH, x)
# define FN(F) CONCAT4 (F, f, WIDTH, x)
#else
# define TYPE CONCAT (_Float, WIDTH)
# define CST(C) CONCAT3 (C, f, WIDTH)
# define FN(F) CONCAT3 (F, f, WIDTH)
#endif

#include <fenv.h>

extern void exit (int);
extern void abort (void);

volatile TYPE nan_cst = FN (__builtin_nan) ("");
volatile TYPE nans_cst = FN (__builtin_nans) ("");

int
main (void)
{
  volatile TYPE r;
  r = nan_cst + nan_cst;
  if (fetestexcept (FE_INVALID))
    abort ();
  r = nans_cst + nans_cst;
  if (!fetestexcept (FE_INVALID))
    abort ();
  exit (0);
}