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/* 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);
}
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