Subversion Repositories openrisc_2011-10-31

/* Test IEEE +0/-0 rules */

static double pzero = +0.0;

static double nzero = -0.0;

static double pinf  = +1.0 / 0.0;

static double ninf  = -1.0 / 0.0;

static double nan   =  0.0 / 0.0;

void

expect (double value, double expected)

{

  if (expected != expected)     /* expected value is Not a number */

    {

      if (value == value)       /* actual value is a number */

        abort ();

    }

  else if (value != value)

    abort ();                   /* actual value is a NaN */

  else if (memcmp ((void *)&value, (void *)&expected, sizeof (double)) != 0)

    abort ();                   /* values don't match */

}

main ()

{

  expect (pzero + pzero, pzero);

  expect (pzero + nzero, pzero);

  expect (nzero + pzero, pzero);

  expect (nzero + nzero, nzero);

  expect (pzero - pzero, pzero);

  expect (pzero - nzero, pzero);

  expect (nzero - pzero, nzero);

  expect (nzero - nzero, pzero);

  expect (pzero * pzero, pzero);

  expect (pzero * nzero, nzero);

  expect (nzero * pzero, nzero);

  expect (nzero * nzero, pzero);

  expect (+1.00 * pzero, pzero);

  expect (-1.00 * pzero, nzero);

  expect (+1.00 * nzero, nzero);

  expect (-1.00 * nzero, pzero);

  expect (pzero / pzero, nan);

  expect (pzero / nzero, nan);

  expect (nzero / pzero, nan);

  expect (nzero / nzero, nan);

  expect (+1.00 / pzero, pinf);

  expect (-1.00 / pzero, ninf);

  expect (+1.00 / nzero, ninf);

  expect (-1.00 / nzero, pinf);

  exit (0);

}