static void
check_inf_nan (void)
{
/* only if nans and infs are available */
#if _GMP_IEEE_FLOATS
mpfr_t x;
double d;
long exp;
mpfr_init2 (x, 123);
mpfr_set_inf (x, 1);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
ASSERT_ALWAYS (d > 0);
ASSERT_ALWAYS (DOUBLE_ISINF (d));
mpfr_set_inf (x, -1);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
ASSERT_ALWAYS (d < 0);
ASSERT_ALWAYS (DOUBLE_ISINF (d));
mpfr_set_nan (x);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
ASSERT_ALWAYS (DOUBLE_ISNAN (d));
mpfr_clear (x);
#endif
}
static void
check_inf_nan (void)
{
#if !defined(MPFR_ERRDIVZERO)
mpfr_t x;
double d;
long exp;
mpfr_init2 (x, 123);
mpfr_set_inf (x, 1);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
MPFR_ASSERTN (d > 0);
MPFR_ASSERTN (DOUBLE_ISINF (d));
mpfr_set_inf (x, -1);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
MPFR_ASSERTN (d < 0);
MPFR_ASSERTN (DOUBLE_ISINF (d));
mpfr_set_nan (x);
d = (double) mpfr_get_ld_2exp (&exp, x, MPFR_RNDZ);
MPFR_ASSERTN (DOUBLE_ISNAN (d));
mpfr_clear (x);
#endif
}
/* Check that hardware rounding doesn't make mpfr_get_ld_2exp return a value
outside its defined range. */
static void
check_round (void)
{
static const unsigned long data[] = {1, 32, 53, 54, 63, 64, 65, 127, 128, 256, 512 };
mpfr_t f;
long double got;
long got_exp;
int i, rnd_mode, neg;
mpfr_init2 (f, 1024L);
for (rnd_mode = 0; rnd_mode < MPFR_RND_MAX ; rnd_mode++)
{
for (i = 0; i < (int) numberof (data); i++)
{
mpfr_set_ui (f, 1L, MPFR_RNDZ);
mpfr_mul_2exp (f, f, data[i], MPFR_RNDZ);
mpfr_sub_ui (f, f, 1L, MPFR_RNDZ);
for (neg = 0; neg <= 1; neg++)
{
got = mpfr_get_ld_2exp (&got_exp, f, (mpfr_rnd_t) rnd_mode);
if (neg == 0
? (got < 0.5 || got >= 1.0)
: (got <= -1.0 || got > -0.5))
{
printf ("mpfr_get_ld_2exp wrong on 2**%lu-1\n", data[i]);
printf ("result out of range, expect 0.5 <= got < 1.0\n");
printf (" rnd_mode = %d\n", rnd_mode);
printf (" data[i] = %lu\n", data[i]);
printf (" f ");
mpfr_out_str (stdout, 2, 0, f, MPFR_RNDN);
printf ("\n");
d_trace (" got ", got);
printf (" got exp %ld\n", got_exp);
exit(1);
}
mpfr_neg (f, f, MPFR_RNDZ);
}
}
}
mpfr_clear (f);
}
