static void
teq (mpfr_t x)
{
mpfr_t y;
unsigned long k, px, mx;
mpfr_init2 (y, MPFR_PREC(x));
mx = (MPFR_PREC(x) - 1) / mp_bits_per_limb;
px = mp_bits_per_limb - 2;
for (k = 2; k < MPFR_PREC(x); k++)
{
mpfr_set (y, x, MPFR_RNDN);
MPFR_MANT(y) [mx] ^= (mp_limb_t) 1 << px;
if (mpfr_eq(y, x, k) || !mpfr_eq(y, x, k - 1))
{
printf ("Error in eq.\n");
printf ("x = "); mpfr_print_binary (x); printf ("\n");
printf ("y = "); mpfr_print_binary (y); printf ("\n");
printf ("k = %lu\n", k);
printf ("mpfr_eq(y, x, k) = %d\nmpfr_eq(y, x, k - 1) = %d\n",
mpfr_eq (y, x, k), mpfr_eq (y, x, k - 1));
exit (1);
}
if (px)
{
--px;
}
else
{
--mx;
px = mp_bits_per_limb - 1;
}
}
mpfr_clear (y);
}
int
main (void)
{
int j, k;
mpfr_t x, y, z, t, y2, z2, t2;
tests_start_mpfr ();
mpfr_inits2 (SIZEX, x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
mpfr_set_str1 (x, "0.5");
mpfr_ceil(y, x);
if (mpfr_cmp_ui (y, 1))
{
printf ("Error in mpfr_ceil for x=0.5: expected 1.0, got ");
mpfr_print_binary(y);
putchar('\n');
exit (1);
}
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_ceil(y, x);
if (mpfr_cmp_ui(y,0))
{
printf ("Error in mpfr_ceil for x=0.0: expected 0.0, got ");
mpfr_print_binary(y);
putchar('\n');
exit (1);
}
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_ceil(y, x);
if (mpfr_cmp_ui(y,1))
{
printf ("Error in mpfr_ceil for x=1.0: expected 1.0, got ");
mpfr_print_binary(y);
putchar('\n');
exit (1);
}
for (j=0;j<1000;j++)
{
mpfr_urandomb (x, RANDS);
MPFR_EXP (x) = 2;
for (k = 2; k <= SIZEX; k++)
{
mpfr_set_prec(y, k);
mpfr_set_prec(y2, k);
mpfr_set_prec(z, k);
mpfr_set_prec(z2, k);
mpfr_set_prec(t, k);
mpfr_set_prec(t2, k);
mpfr_floor(y, x);
mpfr_set(y2, x, MPFR_RNDD);
mpfr_trunc(z, x);
mpfr_set(z2, x, MPFR_RNDZ);
mpfr_ceil(t, x);
mpfr_set(t2, x, MPFR_RNDU);
if (!mpfr_eq(y, y2, k))
{
printf("Error in floor, x = "); mpfr_print_binary(x);
printf("\n");
printf("floor(x) = "); mpfr_print_binary(y);
printf("\n");
printf("round(x, RNDD) = "); mpfr_print_binary(y2);
printf("\n");
exit(1);
}
if (!mpfr_eq(z, z2, k))
{
printf("Error in trunc, x = "); mpfr_print_binary(x);
printf("\n");
printf("trunc(x) = "); mpfr_print_binary(z);
printf("\n");
printf("round(x, RNDZ) = "); mpfr_print_binary(z2);
printf("\n");
exit(1);
}
if (!mpfr_eq(y, y2, k))
{
printf("Error in ceil, x = "); mpfr_print_binary(x);
printf("\n");
printf("ceil(x) = "); mpfr_print_binary(t);
printf("\n");
printf("round(x, RNDU) = "); mpfr_print_binary(t2);
printf("\n");
exit(1);
}
MPFR_EXP(x)++;
}
}
mpfr_clears (x, y, z, t, y2, z2, t2, (mpfr_ptr) 0);
tests_end_mpfr ();
return 0;
}
static void
special (void)
{
mpfr_t x, y, z;
int i, error = 0;
mpfr_init2 (x, 53);
mpfr_init2 (y, 53);
mpfr_init2 (z, 53);
mpfr_set_str (x, "1", 10, (mpfr_rnd_t) 0);
mpfr_set_str (y, "1e-10000", 10, (mpfr_rnd_t) 0);
mpfr_add (z, x, y, MPFR_RNDU);
for (i = 1; i <= 52; i++)
if (mpfr_eq (x, z, i) == 0)
error = 1;
for (i = 53; i <= 100; i++)
if (mpfr_eq (x, z, i) != 0)
error = 1;
if (mpfr_eq (x, z, 1000) != 0)
error = 1;
if (error)
{
printf ("Error in mpfr_eq (1, 1+1e-1000)\n");
exit (1);
}
mpfr_set_nan (x);
mpfr_set_nan (y);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_inf (y, 1);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_ui (y, 0, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_inf (x, 1);
mpfr_set_inf (y, 1);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
mpfr_set_inf (x, 1);
mpfr_set_inf (y, -1);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_inf (x, -1);
mpfr_set_inf (y, -1);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
mpfr_set_inf (x, 1);
mpfr_set_ui (y, 0, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_set_ui (y, 0, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
MPFR_ASSERTN(mpfr_eq (y, x, 1) == 0);
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_set_ui (y, 0, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
mpfr_neg (y, y, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
mpfr_neg (x, x, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_neg (y, x, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_prec (x, 2 * mp_bits_per_limb);
mpfr_set_prec (y, mp_bits_per_limb);
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_set_ui (y, 1, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb));
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1));
mpfr_nextabove (x);
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb) == 0);
MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1) == 0);
MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb));
MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb + 1));
MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb - 1));
MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb) == 0);
MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb + 1) == 0);
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_set_ui (y, 2, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
mpfr_set_prec (x, 2 * mp_bits_per_limb);
mpfr_set_prec (y, 2 * mp_bits_per_limb);
mpfr_set_ui (x, 2, MPFR_RNDN);
mpfr_set_ui (y, 3, MPFR_RNDN);
MPFR_ASSERTN(mpfr_eq (x, y, 1));
MPFR_ASSERTN(mpfr_eq (x, y, 2) == 0);
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb) == 0);
MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1) == 0);
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
}
