static void
tiny (int stop)
{
mpfr_exp_t emin;
int err = 0;
emin = mpfr_get_emin ();
/* Note: in r7499, exponent -17 will select the generic code (in
tiny_aux, x has precision 32), while the other exponent values
will select special code for tiny values. */
err |= tiny_aux (stop, -17);
err |= tiny_aux (stop, -999);
err |= tiny_aux (stop, mpfr_get_emin ());
if (emin != MPFR_EMIN_MIN)
{
mpfr_set_emin (MPFR_EMIN_MIN);
err |= tiny_aux (stop, MPFR_EMIN_MIN);
mpfr_set_emin (emin);
}
if (err)
exit (1);
}
static void
check_special_pow_si ()
{
mpfr_t a, b;
mp_exp_t emin;
mpfr_init (a);
mpfr_init (b);
mpfr_set_str (a, "2E100000000", 10, GMP_RNDN);
mpfr_set_si (b, -10, GMP_RNDN);
test_pow (b, a, b, GMP_RNDN);
if (!MPFR_IS_ZERO(b))
{
printf("Pow(2E10000000, -10) failed\n");
mpfr_dump (a);
mpfr_dump (b);
exit(1);
}
emin = mpfr_get_emin ();
mpfr_set_emin (-10);
mpfr_set_si (a, -2, GMP_RNDN);
mpfr_pow_si (b, a, -10000, GMP_RNDN);
if (!MPFR_IS_ZERO (b))
{
printf ("Pow_so (1, -10000) doesn't underflow if emin=-10.\n");
mpfr_dump (a);
mpfr_dump (b);
exit (1);
}
mpfr_set_emin (emin);
mpfr_clear (a);
mpfr_clear (b);
}
/* tests intermediate underflow; WONTFIX */
static int
test_underflow (void)
{
mpc_t z;
mpfr_exp_t emin = mpfr_get_emin ();
mpfr_set_emin (-10);
mpc_init2 (z, 21);
mpfr_set_si (mpc_realref(z), -1, GMP_RNDZ);
mpfr_set_ui_2exp (mpc_imagref(z), 1, 20, GMP_RNDZ);
mpfr_add_ui (mpc_imagref(z), mpc_imagref(z), 1, GMP_RNDZ);
mpfr_div_2exp (mpc_imagref(z), mpc_imagref(z), 20, GMP_RNDZ);
mpc_atan (z, z, MPC_RNDNN);
if (mpfr_cmp_si_2exp (mpc_realref(z), -1066635, 20) != 0 ||
mpfr_cmp_si_2exp (mpc_imagref(z), 1687619, 22))
{
printf ("Error in test_coverage\n");
printf ("expected (-1066635/2^20 1687619/2^22)\n");
printf ("got ");
mpc_out_str (stdout, 10, 20, z, MPC_RNDNN);
printf ("\n");
exit (1);
}
mpc_clear (z);
mpfr_set_emin (emin);
}
/* from Christopher Creutzig, 18 Jul 2007 */
static void
smallvals_atan2 (void)
{
mpfr_t a, x, y;
mpfr_exp_t old_emin;
mpfr_inits (a, x, y, (mpfr_ptr) 0);
mpfr_set_ui (y, 0, MPFR_RNDN);
mpfr_nextbelow (y);
mpfr_set_ui (x, 1, MPFR_RNDN);
/* y=-2^(-emin-1), x=1 */
mpfr_atan2 (a, y, x, MPFR_RNDD);
MPFR_ASSERTN (mpfr_equal_p (a, y));
mpfr_atan2 (a, y, x, MPFR_RNDU);
MPFR_ASSERTN (mpfr_zero_p (a) && MPFR_IS_NEG(a));
mpfr_set_prec (x, 8);
mpfr_set_prec (y, 8);
mpfr_set_prec (a, 8);
old_emin = mpfr_get_emin ();
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_si (y, 3, MPFR_RNDN);
mpfr_set_exp (y, mpfr_get_emin ());
mpfr_set_str_binary (x, "1.1");
mpfr_atan2 (a, y, x, MPFR_RNDU);
mpfr_set_si (y, 1, MPFR_RNDN);
mpfr_set_exp (y, mpfr_get_emin ());
MPFR_ASSERTN (mpfr_equal_p (a, y));
/* From a bug reported by Christopher Creutzig on 2007-08-28.
Added test in each rounding mode.
Segmentation fault or assertion failure due to an infinite Ziv loop. */
mpfr_set_si (y, 1, MPFR_RNDN);
mpfr_set_exp (y, mpfr_get_emin ());
mpfr_set_str_binary (x, "1.01");
mpfr_atan2 (a, y, x, MPFR_RNDZ);
MPFR_ASSERTN (mpfr_zero_p (a));
mpfr_atan2 (a, y, x, MPFR_RNDD);
MPFR_ASSERTN (mpfr_zero_p (a));
mpfr_atan2 (a, y, x, MPFR_RNDU);
MPFR_ASSERTN (mpfr_equal_p (a, y));
mpfr_atan2 (a, y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_equal_p (a, y));
/* trigger underflow with rounding to nearest */
mpfr_set_ui (x, 4, MPFR_RNDN);
mpfr_atan2 (a, y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_zero_p (a));
mpfr_set_emin (old_emin);
mpfr_clears (a, x, y, (mpfr_ptr) 0);
}
static void
check1 (void)
{
mpfr_t x;
int i, j;
mpfr_set_default_prec (9);
mpfr_set_emin (-10);
mpfr_set_emax (10);
mpfr_init (x);
for (i = 0; i < (sizeof (tab) / sizeof (tab[0])); i++)
{
mpfr_set_str (x, tab[i].in, 2, GMP_RNDN);
j = mpfr_subnormalize (x, tab[i].i, tab[i].rnd);
if (mpfr_cmp_str (x, tab[i].out, 2, GMP_RNDN) != 0)
{
printf ("Error for i=%d\nFor:%s\nExpected:%s\nGot:",
i, tab[i].in, tab[i].out);
mpfr_dump (x);
exit (1);
}
}
mpfr_clear (x);
}
static void
round_str (FILE *fout, const char *s, int prec, int emin, int emax,
bool ibm_ld)
{
mpfr_t f;
mpfr_set_default_prec (prec);
mpfr_set_emin (emin);
mpfr_set_emax (emax);
mpfr_init (f);
int r = string_to_fp (f, s, MPFR_RNDD);
if (ibm_ld)
{
assert (prec == 106 && emin == -1073 && emax == 1024);
/* The maximum value in IBM long double has discontiguous
mantissa bits. */
mpfr_t max_value;
mpfr_init2 (max_value, 107);
mpfr_set_str (max_value, "0x1.fffffffffffff7ffffffffffffcp+1023", 0,
MPFR_RNDN);
if (mpfr_cmpabs (f, max_value) > 0)
r = 1;
mpfr_clear (max_value);
}
mpfr_fprintf (fout, "\t%s,\n", r ? "false" : "true");
print_fp (fout, f, ",\n");
string_to_fp (f, s, MPFR_RNDN);
print_fp (fout, f, ",\n");
string_to_fp (f, s, MPFR_RNDZ);
print_fp (fout, f, ",\n");
string_to_fp (f, s, MPFR_RNDU);
print_fp (fout, f, "");
mpfr_clear (f);
}
/* pos is 512 times the proportion of negative numbers.
If pos=256, half of the numbers are negative.
If pos=0, all generated numbers are positive.
*/
void
tests_default_random (mpfr_ptr x, int pos, mpfr_exp_t emin, mpfr_exp_t emax)
{
MPFR_ASSERTN (emin <= emax);
MPFR_ASSERTN (emin >= MPFR_EMIN_MIN);
MPFR_ASSERTN (emax <= MPFR_EMAX_MAX);
/* but it isn't required that emin and emax are in the current
exponent range (see below), so that underflow/overflow checks
can be done on 64-bit machines. */
mpfr_urandomb (x, RANDS);
if (MPFR_IS_PURE_FP (x) && (emin >= 1 || (randlimb () & 1)))
{
mpfr_exp_t e;
e = MPFR_GET_EXP (x) +
(emin + (long) (randlimb () % (emax - emin + 1)));
/* Note: There should be no overflow here because both terms are
between MPFR_EMIN_MIN and MPFR_EMAX_MAX, but the sum e isn't
necessarily between MPFR_EMIN_MIN and MPFR_EMAX_MAX. */
if (mpfr_set_exp (x, e))
{
/* The random number doesn't fit in the current exponent range.
In this case, test the function in the extended exponent range,
which should be restored by the caller. */
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_emax (MPFR_EMAX_MAX);
mpfr_set_exp (x, e);
}
}
if (randlimb () % 512 < pos)
mpfr_neg (x, x, MPFR_RNDN);
}
/* pos is 512 times the proportion of negative numbers.
If pos=256, half of the numbers are negative.
If pos=0, all generated numbers are positive.
*/
void
tests_default_random (mpfr_ptr x, int pos, mpfr_exp_t emin, mpfr_exp_t emax,
int always_scale)
{
MPFR_ASSERTN (emin <= emax);
MPFR_ASSERTN (emin >= MPFR_EMIN_MIN);
MPFR_ASSERTN (emax <= MPFR_EMAX_MAX);
/* but it isn't required that emin and emax are in the current
exponent range (see below), so that underflow/overflow checks
can be done on 64-bit machines without a manual change of the
exponent range (well, this is a bit ugly...). */
mpfr_urandomb (x, RANDS);
if (MPFR_IS_PURE_FP (x) && (emin >= 1 || always_scale || (randlimb () & 1)))
{
mpfr_exp_t e;
e = emin + (mpfr_exp_t) (randlimb () % (emax - emin + 1));
/* Note: There should be no overflow here because both terms are
between MPFR_EMIN_MIN and MPFR_EMAX_MAX. */
MPFR_ASSERTD (e >= emin && e <= emax);
if (mpfr_set_exp (x, e))
{
/* The random number doesn't fit in the current exponent range.
In this case, test the function in the extended exponent range,
which should be restored by the caller. */
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_emax (MPFR_EMAX_MAX);
mpfr_set_exp (x, e);
}
}
if (randlimb () % 512 < pos)
mpfr_neg (x, x, MPFR_RNDN);
}
/* bug found by Kevin P. Rauch on 22 Oct 2007 */
static void
check2 (void)
{
mpfr_t x, y, z;
int tern;
mpfr_exp_t emin;
emin = mpfr_get_emin ();
mpfr_init2 (x, 32);
mpfr_init2 (y, 32);
mpfr_init2 (z, 32);
mpfr_set_ui (x, 0xC0000000U, MPFR_RNDN);
mpfr_neg (x, x, MPFR_RNDN);
mpfr_set_ui (y, 0xFFFFFFFEU, MPFR_RNDN);
mpfr_set_exp (x, 0);
mpfr_set_exp (y, 0);
mpfr_set_emin (-29);
tern = mpfr_mul (z, x, y, MPFR_RNDN);
/* z = -0.BFFFFFFE, tern > 0 */
tern = mpfr_subnormalize (z, tern, MPFR_RNDN);
/* z should be -0.75 */
MPFR_ASSERTN (tern < 0 && mpfr_cmp_si_2exp (z, -3, -2) == 0);
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
MPFR_ASSERTN (mpfr_get_emin () == -29);
set_emin (emin);
}
static void
check_diff (void)
{
int inex;
mpfr_t x;
mpz_t z;
mpfr_exp_t emin;
mpz_init (z);
mpfr_init2 (x, 2);
mpfr_set_ui (x, 2047, MPFR_RNDU);
mpz_set_fr (z, x, MPFR_RNDN);
if (mpz_cmp_ui (z, 2048) != 0)
{
printf ("get_z RU 2048 failed\n");
exit (1);
}
mpfr_set_prec (x, 6);
mpfr_set_str (x, "17.5", 10, MPFR_RNDN);
inex = mpfr_get_z (z, x, MPFR_RNDN);
if (inex <= 0 || mpz_cmp_ui (z, 18) != 0)
{
printf ("get_z RN 17.5 failed\n");
exit (1);
}
/* save default emin */
emin = mpfr_get_emin ();;
mpfr_set_emin (17);
mpfr_set_ui (x, 0, MPFR_RNDN);
inex = mpfr_get_z (z, x, MPFR_RNDN);
if (inex != 0 || mpz_cmp_ui (z, 0) != 0)
{
printf ("get_z 0 failed\n");
exit (1);
}
/* restore default emin */
mpfr_set_emin (emin);
mpfr_clear (x);
mpz_clear (z);
}
void
set_emin (mpfr_exp_t exponent)
{
if (mpfr_set_emin (exponent))
{
printf ("set_emin: setting emin to %ld failed\n", (long int) exponent);
exit (1);
}
}
static void
test_erfc (void)
{
mpfr_t x, y, z;
int inex;
mpfr_exp_t emin;
mpfr_inits2 (40, x, y, z, (mpfr_ptr) 0);
mpfr_set_si_2exp (x, -1, -10, MPFR_RNDN);
mpfr_set_str_binary (z, "0.1000000000100100000110111010110111100000E1");
mpfr_erfc (y, x, MPFR_RNDN);
if (mpfr_cmp (y, z) != 0)
{
printf ("mpfr_erfc failed for x = ");
mpfr_dump (x);
printf ("got ");
mpfr_dump (y);
printf ("instead of ");
mpfr_dump (z);
exit (1);
}
/* slowness detected by Kevin Rauch on 26 Oct 2007 */
mpfr_set_prec (x, 128);
mpfr_set_si (x, -256, MPFR_RNDN);
inex = mpfr_erfc (x, x, MPFR_RNDN);
MPFR_ASSERTN(inex > 0 && mpfr_cmp_ui (x, 2) == 0);
/* bug found by Pascal Molin on March 10, 2011 */
emin = mpfr_get_emin ();
if (! mpfr_set_emin (-1073808789))
{
/* Typically, a 64-bit machine. */
mpfr_set_si (x, 27282, MPFR_RNDN);
mpfr_erfc (y, x, MPFR_RNDN);
MPFR_ASSERTN(mpfr_cmp_ui (y, 0) != 0);
mpfr_set_emin (emin);
}
mpfr_clears (x, y, z, (mpfr_ptr) 0);
}
static void
reduced_expo_range (void)
{
mpfr_exp_t emin, emax;
mpfr_t x, y, ex_y;
int inex, ex_inex;
unsigned int flags, ex_flags;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
mpfr_inits2 (4, x, y, ex_y, (mpfr_ptr) 0);
mpfr_set_str (x, "-0.1e1", 2, MPFR_RNDN);
mpfr_set_emin (1);
mpfr_set_emax (1);
mpfr_clear_flags ();
inex = mpfr_asin (y, x, MPFR_RNDA);
flags = __gmpfr_flags;
mpfr_set_emin (emin);
mpfr_set_emax (emax);
mpfr_set_str (ex_y, "-0.1101e1", 2, MPFR_RNDN);
ex_inex = -1;
ex_flags = MPFR_FLAGS_INEXACT;
if (SIGN (inex) != ex_inex || flags != ex_flags ||
! mpfr_equal_p (y, ex_y))
{
printf ("Error in reduced_expo_range\non x = ");
mpfr_dump (x);
printf ("Expected y = ");
mpfr_out_str (stdout, 2, 0, ex_y, MPFR_RNDN);
printf ("\n inex = %d, flags = %u\n", ex_inex, ex_flags);
printf ("Got y = ");
mpfr_out_str (stdout, 2, 0, y, MPFR_RNDN);
printf ("\n inex = %d, flags = %u\n", SIGN (inex), flags);
exit (1);
}
mpfr_clears (x, y, ex_y, (mpfr_ptr) 0);
}
void
fmpr_printd(const fmpr_t x, long digits)
{
mpfr_t t;
mpfr_init2(t, digits * 3.33 + 10);
mpfr_set_emin(MPFR_EMIN_MIN);
mpfr_set_emax(MPFR_EMAX_MAX);
fmpr_get_mpfr(t, x, MPFR_RNDN);
mpfr_printf("%.*Rg", FLINT_MAX(digits, 1), t);
mpfr_clear(t);
}
int
main (int argc, char *argv[])
{
mpfr_exp_t emin;
tests_start_mpfr ();
/* mpfr_round_nearest_away requires emin is not the smallest possible */
if ((emin = mpfr_get_emin ()) == mpfr_get_emin_min ())
mpfr_set_emin (mpfr_get_emin_min () + 1);
test_special ();
test_nonspecial ();
mpfr_set_emin (emin);
tests_end_mpfr ();
return 0;
}
/* bug found by Kevin P. Rauch on 22 Oct 2007 */
static void
check3 (void)
{
mpfr_t x, y, z;
int tern;
mpfr_exp_t emin;
emin = mpfr_get_emin ();
mpfr_init2 (x, 32);
mpfr_init2 (y, 32);
mpfr_init2 (z, 32);
mpfr_set_ui (x, 0xBFFFFFFFU, MPFR_RNDN); /* 3221225471/2^32 */
mpfr_set_ui (y, 0x80000001U, MPFR_RNDN); /* 2147483649/2^32 */
mpfr_set_exp (x, 0);
mpfr_set_exp (y, 0);
mpfr_set_emin (-1);
/* the exact product is 6917529028714823679/2^64, which is rounded to
3/8 = 0.375, which is smaller, thus tern < 0 */
tern = mpfr_mul (z, x, y, MPFR_RNDN);
MPFR_ASSERTN (tern < 0 && mpfr_cmp_ui_2exp (z, 3, -3) == 0);
tern = mpfr_subnormalize (z, tern, MPFR_RNDN);
/* since emin = -1, and EXP(z)=-1, z should be rounded to precision
EXP(z)-emin+1 = 1, i.e., z should be a multiple of the smallest possible
positive representable value with emin=-1, which is 1/4. The two
possible values are 1/4 and 2/4, which are at equal distance of z.
But since tern < 0, we should choose the largest value, i.e., 2/4. */
MPFR_ASSERTN (tern > 0 && mpfr_cmp_ui_2exp (z, 1, -1) == 0);
/* here is another test for the alternate case, where z was rounded up
first, thus we have to round down */
mpfr_set_str_binary (x, "0.11111111111010110101011011011011");
mpfr_set_str_binary (y, "0.01100000000001111100000000001110");
tern = mpfr_mul (z, x, y, MPFR_RNDN);
MPFR_ASSERTN (tern > 0 && mpfr_cmp_ui_2exp (z, 3, -3) == 0);
tern = mpfr_subnormalize (z, tern, MPFR_RNDN);
MPFR_ASSERTN (tern < 0 && mpfr_cmp_ui_2exp (z, 1, -2) == 0);
/* finally the case where z was exact, which we simulate here */
mpfr_set_ui_2exp (z, 3, -3, MPFR_RNDN);
tern = mpfr_subnormalize (z, 0, MPFR_RNDN);
MPFR_ASSERTN (tern > 0 && mpfr_cmp_ui_2exp (z, 1, -1) == 0);
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
MPFR_ASSERTN (mpfr_get_emin () == -1);
set_emin (emin);
}
static void
check_special (void)
{
mpfr_t x, y;
mpfr_exp_t emin;
mpfr_init (x);
mpfr_init (y);
mpfr_set_nan (x);
mpfr_sqr (y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_nan_p (y));
mpfr_set_inf (x, 1);
mpfr_sqr (y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0);
mpfr_set_inf (x, -1);
mpfr_sqr (y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0);
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_sqr (y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_zero_p (y));
emin = mpfr_get_emin ();
mpfr_set_emin (0);
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_div_2ui (x, x, 1, MPFR_RNDN);
MPFR_ASSERTN (!mpfr_zero_p (x));
mpfr_sqr (y, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_zero_p (y));
mpfr_set_emin (emin);
mpfr_clear (y);
mpfr_clear (x);
}
/* bug found by Kevin Rauch */
static void
test20071231 (void)
{
mpfr_t x;
int inex;
mpfr_exp_t emin;
emin = mpfr_get_emin ();
mpfr_set_emin (-1000000);
mpfr_init2 (x, 21);
mpfr_set_str (x, "-1000001.5", 10, MPFR_RNDN);
inex = mpfr_gamma (x, x, MPFR_RNDN);
MPFR_ASSERTN(MPFR_IS_ZERO(x) && MPFR_IS_POS(x) && inex < 0);
mpfr_clear (x);
mpfr_set_emin (emin);
mpfr_init2 (x, 53);
mpfr_set_str (x, "-1000000001.5", 10, MPFR_RNDN);
inex = mpfr_gamma (x, x, MPFR_RNDN);
MPFR_ASSERTN(MPFR_IS_ZERO(x) && MPFR_IS_POS(x) && inex < 0);
mpfr_clear (x);
}
/* special code for IEEE 754 little-endian extended format */
long double
mpfr_get_ld (mpfr_srcptr x, mpfr_rnd_t rnd_mode)
{
mpfr_long_double_t ld;
mpfr_t tmp;
int inex;
MPFR_SAVE_EXPO_DECL (expo);
MPFR_SAVE_EXPO_MARK (expo);
mpfr_init2 (tmp, MPFR_LDBL_MANT_DIG);
inex = mpfr_set (tmp, x, rnd_mode);
mpfr_set_emin (-16382-63);
mpfr_set_emax (16384);
mpfr_subnormalize (tmp, mpfr_check_range (tmp, inex, rnd_mode), rnd_mode);
mpfr_prec_round (tmp, 64, MPFR_RNDZ); /* exact */
if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (tmp)))
ld.ld = (long double) mpfr_get_d (tmp, rnd_mode);
else
{
mp_limb_t *tmpmant;
mpfr_exp_t e, denorm;
tmpmant = MPFR_MANT (tmp);
e = MPFR_GET_EXP (tmp);
/* The smallest positive normal number is 2^(-16382), which is
0.5*2^(-16381) in MPFR, thus any exponent <= -16382 corresponds to a
subnormal number. The smallest positive subnormal number is 2^(-16445)
which is 0.5*2^(-16444) in MPFR thus 0 <= denorm <= 63. */
denorm = MPFR_UNLIKELY (e <= -16382) ? - e - 16382 + 1 : 0;
MPFR_ASSERTD (0 <= denorm && denorm < 64);
#if GMP_NUMB_BITS >= 64
ld.s.manl = (tmpmant[0] >> denorm);
ld.s.manh = (tmpmant[0] >> denorm) >> 32;
#elif GMP_NUMB_BITS == 32
if (MPFR_LIKELY (denorm == 0))
{
ld.s.manl = tmpmant[0];
ld.s.manh = tmpmant[1];
}
else if (denorm < 32)
{
ld.s.manl = (tmpmant[0] >> denorm) | (tmpmant[1] << (32 - denorm));
ld.s.manh = tmpmant[1] >> denorm;
}
else /* 32 <= denorm < 64 */
{
void
arf_fprintd(FILE * file, const arf_t x, slong d)
{
if (arf_is_finite(x) && (ARF_EXP(x) <= MPFR_EMIN_MIN + 1 ||
ARF_EXP(x) >= MPFR_EMAX_MAX - 1))
{
arf_fprint(file, x);
}
else
{
mpfr_t t;
mpfr_init2(t, d * 3.33 + 10);
mpfr_set_emin(MPFR_EMIN_MIN);
mpfr_set_emax(MPFR_EMAX_MAX);
arf_get_mpfr(t, x, MPFR_RNDN);
mpfr_fprintf(file, "%.*Rg", FLINT_MAX(d, 1), t);
mpfr_clear(t);
}
}
/* requires x != 1 */
static void
arf_log_via_mpfr(arf_t z, const arf_t x, slong prec, arf_rnd_t rnd)
{
mpfr_t xf, zf;
mp_ptr zptr, tmp;
mp_srcptr xptr;
mp_size_t xn, zn, val;
TMP_INIT;
TMP_START;
zn = (prec + FLINT_BITS - 1) / FLINT_BITS;
tmp = TMP_ALLOC(zn * sizeof(mp_limb_t));
ARF_GET_MPN_READONLY(xptr, xn, x);
xf->_mpfr_d = (mp_ptr) xptr;
xf->_mpfr_prec = xn * FLINT_BITS;
xf->_mpfr_sign = ARF_SGNBIT(x) ? -1 : 1;
xf->_mpfr_exp = ARF_EXP(x);
zf->_mpfr_d = tmp;
zf->_mpfr_prec = prec;
zf->_mpfr_sign = 1;
zf->_mpfr_exp = 0;
mpfr_set_emin(MPFR_EMIN_MIN);
mpfr_set_emax(MPFR_EMAX_MAX);
mpfr_log(zf, xf, arf_rnd_to_mpfr(rnd));
val = 0;
while (tmp[val] == 0)
val++;
ARF_GET_MPN_WRITE(zptr, zn - val, z);
flint_mpn_copyi(zptr, tmp + val, zn - val);
if (zf->_mpfr_sign < 0)
ARF_NEG(z);
fmpz_set_si(ARF_EXPREF(z), zf->_mpfr_exp);
TMP_END;
}
long double
mpfr_get_ld (mpfr_srcptr x, mp_rnd_t rnd_mode)
{
mpfr_long_double_t ld;
mpfr_t tmp;
MPFR_SAVE_EXPO_DECL (expo);
MPFR_SAVE_EXPO_MARK (expo);
mpfr_set_emin (-16382-63);
mpfr_set_emax (16383);
mpfr_init2 (tmp, MPFR_LDBL_MANT_DIG);
mpfr_subnormalize(tmp, mpfr_set (tmp, x, rnd_mode), rnd_mode);
mpfr_prec_round (tmp, 64, GMP_RNDZ); /* exact */
if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (tmp)))
ld.ld = (long double) mpfr_get_d (tmp, rnd_mode);
else
{
mp_limb_t *tmpmant;
mp_exp_t e, denorm;
tmpmant = MPFR_MANT (tmp);
e = MPFR_GET_EXP (tmp);
denorm = MPFR_UNLIKELY (e < -16382) ? - e - 16382 + 1 : 0;
#if BITS_PER_MP_LIMB >= 64
ld.s.manl = (tmpmant[0] >> denorm);
ld.s.manh = (tmpmant[0] >> denorm) >> 32;
#elif BITS_PER_MP_LIMB == 32
if (MPFR_LIKELY (denorm == 0))
{
ld.s.manl = tmpmant[0];
ld.s.manh = tmpmant[1];
}
else if (denorm < 32)
{
ld.s.manl = (tmpmant[0] >> denorm) | (tmpmant[1] << (32 - denorm));
ld.s.manh = tmpmant[1] >> denorm;
}
else /* 32 <= denorm <= 64 */
{
void
arb_atan_arf_via_mpfr(arb_t z, const arf_t x, slong prec)
{
mpfr_t t, u;
int exact;
mpfr_init2(t, 2 + arf_bits(x));
mpfr_init2(u, prec);
mpfr_set_emin(MPFR_EMIN_MIN);
mpfr_set_emax(MPFR_EMAX_MAX);
arf_get_mpfr(t, x, MPFR_RNDD);
exact = (mpfr_atan(u, t, MPFR_RNDD) == 0);
arf_set_mpfr(arb_midref(z), u);
if (!exact)
arf_mag_set_ulp(arb_radref(z), arb_midref(z), prec);
mpfr_clear(t);
mpfr_clear(u);
}
SEXP R_mpfr_set_erange(SEXP kind_, SEXP val) {
erange_kind kind = asInteger(kind_);
mpfr_exp_t exp_val;
if(isInteger(val))
exp_val = asInteger(val);// assume this is always valid to set
else { // we allow larger values from the R side
PROTECT(val = coerceVector(val, REALSXP));
exp_val = (mpfr_exp_t) asReal(val);
UNPROTECT(1);
}
int i_err;
switch(kind) {
case E_min: i_err = mpfr_set_emin(exp_val); break;
case E_max: i_err = mpfr_set_emax(exp_val); break;
default:
error("invalid kind (code = %d) in R_mpfr_set_erange()", kind);
}
if(i_err) warning("e%s exponent could not be set to %ld (code %d)",
(kind == E_min) ? "min" : "max", (long)exp_val, i_err);
return ScalarInteger(i_err);
}
/* Test n random bad cases. A precision py in [pymin,pymax] and
* a number y of precision py are chosen randomly. One computes
* x = inv(y) in precision px = py + psup (rounded to nearest).
* Then (in general), y is a bad case for fct in precision py (in
* the directed rounding modes, but also in the rounding-to-nearest
* mode for some lower precision: see data_check).
* fct, inv, name: data related to the function.
* pos, emin, emax: arguments for tests_default_random.
*/
void
bad_cases (int (*fct)(FLIST), int (*inv)(FLIST), const char *name,
int pos, mpfr_exp_t emin, mpfr_exp_t emax,
mpfr_prec_t pymin, mpfr_prec_t pymax, mpfr_prec_t psup,
int n)
{
mpfr_t x, y, z;
char *dbgenv;
int i, dbg;
mpfr_exp_t old_emin, old_emax;
old_emin = mpfr_get_emin ();
old_emax = mpfr_get_emax ();
dbgenv = getenv ("MPFR_DEBUG_BADCASES");
dbg = dbgenv != 0 ? atoi (dbgenv) : 0; /* debug level */
mpfr_inits (x, y, z, (mpfr_ptr) 0);
for (i = 0; i < n; i++)
{
mpfr_prec_t px, py, pz;
int inex;
if (dbg)
printf ("bad_cases: i = %d\n", i);
py = pymin + (randlimb () % (pymax - pymin + 1));
mpfr_set_prec (y, py);
tests_default_random (y, pos, emin, emax);
if (dbg)
{
printf ("bad_cases: yprec =%4ld, y = ", (long) py);
mpfr_out_str (stdout, 16, 0, y, MPFR_RNDN);
printf ("\n");
}
px = py + psup;
mpfr_set_prec (x, px);
mpfr_clear_flags ();
inv (x, y, MPFR_RNDN);
if (mpfr_nanflag_p () || mpfr_overflow_p () || mpfr_underflow_p ())
{
if (dbg)
printf ("bad_cases: no normal inverse\n");
goto next_i;
}
if (dbg > 1)
{
printf ("bad_cases: x = ");
mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN);
printf ("\n");
}
pz = px;
do
{
pz += 32;
mpfr_set_prec (z, pz);
if (fct (z, x, MPFR_RNDN) == 0)
{
if (dbg)
printf ("bad_cases: exact case\n");
goto next_i;
}
if (dbg)
{
if (dbg > 1)
{
printf ("bad_cases: %s(x) ~= ", name);
mpfr_out_str (stdout, 16, 0, z, MPFR_RNDN);
}
else
{
printf ("bad_cases: [MPFR_RNDZ] ~= ");
mpfr_out_str (stdout, 16, 40, z, MPFR_RNDZ);
}
printf ("\n");
}
inex = mpfr_prec_round (z, py, MPFR_RNDN);
if (mpfr_nanflag_p () || mpfr_overflow_p () || mpfr_underflow_p ()
|| ! mpfr_equal_p (z, y))
{
if (dbg)
printf ("bad_cases: inverse doesn't match\n");
goto next_i;
}
}
while (inex == 0);
/* We really have a bad case. */
do
py--;
while (py >= MPFR_PREC_MIN && mpfr_prec_round (z, py, MPFR_RNDZ) == 0);
py++;
/* py is now the smallest output precision such that we have
a bad case in the directed rounding modes. */
if (mpfr_prec_round (y, py, MPFR_RNDZ) != 0)
{
printf ("Internal error for i = %d\n", i);
exit (1);
}
if ((inex > 0 && MPFR_IS_POS (z)) ||
(inex < 0 && MPFR_IS_NEG (z)))
{
mpfr_nexttozero (y);
if (mpfr_zero_p (y))
goto next_i;
}
if (dbg)
{
printf ("bad_cases: yprec =%4ld, y = ", (long) py);
mpfr_out_str (stdout, 16, 0, y, MPFR_RNDN);
printf ("\n");
}
/* Note: y is now the expected result rounded toward zero. */
test5rm (fct, x, y, z, MPFR_RNDZ, 0, name);
next_i:
/* In case the exponent range has been changed by
tests_default_random()... */
mpfr_set_emin (old_emin);
mpfr_set_emax (old_emax);
}
mpfr_clears (x, y, z, (mpfr_ptr) 0);
}
static void
check_random (FILE *fout, int nb_tests)
{
int i;
mpfr_t x;
mp_rnd_t rnd;
char flag[] =
{
'-',
'+',
' ',
'#',
'0', /* no ambiguity: first zeros are flag zero*/
'\''
};
char specifier[] =
{
'a',
'b',
'e',
'f',
'g'
};
mp_exp_t old_emin, old_emax;
old_emin = mpfr_get_emin ();
old_emax = mpfr_get_emax ();
mpfr_init (x);
for (i = 0; i < nb_tests; ++i)
{
int ret;
int j, jmax;
int spec, prec;
#define FMT_SIZE 13
char fmt[FMT_SIZE]; /* at most something like "%-+ #0'.*R*f" */
char *ptr = fmt;
tests_default_random (x, 256, MPFR_EMIN_MIN, MPFR_EMAX_MAX);
rnd = RND_RAND ();
spec = (int) (randlimb () % 5);
jmax = (spec == 3 || spec == 4) ? 6 : 5; /* ' flag only with %f or %g */
/* advantage small precision */
prec = (int) (randlimb () % ((randlimb () % 2) ? 10 : prec_max_printf));
if (spec == 3
&& (mpfr_get_exp (x) > prec_max_printf
|| mpfr_get_exp (x) < -prec_max_printf))
/* change style 'f' to style 'e' when number x is large */
--spec;
*ptr++ = '%';
for (j = 0; j < jmax; j++)
{
if (randlimb () % 3 == 0)
*ptr++ = flag[j];
}
*ptr++ = '.';
*ptr++ = '*';
*ptr++ = 'R';
*ptr++ = '*';
*ptr++ = specifier[spec];
*ptr = '\0';
MPFR_ASSERTD (ptr - fmt < FMT_SIZE);
mpfr_fprintf (fout, "mpfr_fprintf(fout, \"%s\", %d, %s, %Re)\n",
fmt, prec, mpfr_print_rnd_mode (rnd), x);
ret = mpfr_fprintf (fout, fmt, prec, rnd, x);
if (ret == -1)
{
if (spec == 3
&& (MPFR_GET_EXP (x) > INT_MAX || MPFR_GET_EXP (x) < -INT_MAX))
/* normal failure: x is too large to be output with full precision */
{
mpfr_fprintf (fout, "too large !");
}
else
{
mpfr_printf ("Error in mpfr_fprintf(fout, \"%s\", %d, %s, %Re)\n",
fmt, prec, mpfr_print_rnd_mode (rnd), x);
exit (1);
}
}
mpfr_fprintf (fout, "\n");
}
mpfr_set_emin (old_emin);
mpfr_set_emax (old_emax);
mpfr_clear (x);
}
static void
exprange (void)
{
mpfr_exp_t emin, emax;
mpfr_t x, y, z;
int inex1, inex2;
unsigned int flags1, flags2;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
mpfr_init2 (x, 16);
mpfr_inits2 (8, y, z, (mpfr_ptr) 0);
mpfr_set_ui_2exp (x, 5, -1, MPFR_RNDN);
mpfr_clear_flags ();
inex1 = mpfr_gamma (y, x, MPFR_RNDN);
flags1 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emin (0);
mpfr_clear_flags ();
inex2 = mpfr_gamma (z, x, MPFR_RNDN);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emin (emin);
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test1)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_set_ui_2exp (x, 32769, -60, MPFR_RNDN);
mpfr_clear_flags ();
inex1 = mpfr_gamma (y, x, MPFR_RNDD);
flags1 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emax (45);
mpfr_clear_flags ();
inex2 = mpfr_gamma (z, x, MPFR_RNDD);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emax (emax);
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test2)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_set_emax (44);
mpfr_clear_flags ();
inex1 = mpfr_check_range (y, inex1, MPFR_RNDD);
flags1 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_clear_flags ();
inex2 = mpfr_gamma (z, x, MPFR_RNDD);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emax (emax);
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test3)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_set_ui_2exp (x, 1, -60, MPFR_RNDN);
mpfr_clear_flags ();
inex1 = mpfr_gamma (y, x, MPFR_RNDD);
flags1 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emax (60);
mpfr_clear_flags ();
inex2 = mpfr_gamma (z, x, MPFR_RNDD);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
mpfr_set_emax (emax);
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test4)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
MPFR_ASSERTN (MPFR_EMIN_MIN == - MPFR_EMAX_MAX);
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_emax (MPFR_EMAX_MAX);
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_nextabove (x); /* x = 2^(emin - 1) */
mpfr_set_inf (y, 1);
inex1 = 1;
flags1 = MPFR_FLAGS_INEXACT | MPFR_FLAGS_OVERFLOW;
mpfr_clear_flags ();
/* MPFR_RNDU: overflow, infinity since 1/x = 2^(emax + 1) */
inex2 = mpfr_gamma (z, x, MPFR_RNDU);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test5)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_clear_flags ();
/* MPFR_RNDN: overflow, infinity since 1/x = 2^(emax + 1) */
inex2 = mpfr_gamma (z, x, MPFR_RNDN);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test6)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_nextbelow (y);
inex1 = -1;
mpfr_clear_flags ();
/* MPFR_RNDD: overflow, maxnum since 1/x = 2^(emax + 1) */
inex2 = mpfr_gamma (z, x, MPFR_RNDD);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test7)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_mul_2ui (x, x, 1, MPFR_RNDN); /* x = 2^emin */
mpfr_set_inf (y, 1);
inex1 = 1;
flags1 = MPFR_FLAGS_INEXACT | MPFR_FLAGS_OVERFLOW;
mpfr_clear_flags ();
/* MPFR_RNDU: overflow, infinity since 1/x = 2^emax */
inex2 = mpfr_gamma (z, x, MPFR_RNDU);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test8)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_clear_flags ();
/* MPFR_RNDN: overflow, infinity since 1/x = 2^emax */
inex2 = mpfr_gamma (z, x, MPFR_RNDN);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test9)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_nextbelow (y);
inex1 = -1;
flags1 = MPFR_FLAGS_INEXACT;
mpfr_clear_flags ();
/* MPFR_RNDD: no overflow, maxnum since 1/x = 2^emax and euler > 0 */
inex2 = mpfr_gamma (z, x, MPFR_RNDD);
flags2 = __gmpfr_flags;
MPFR_ASSERTN (mpfr_inexflag_p ());
if (inex1 != inex2 || flags1 != flags2 || ! mpfr_equal_p (y, z))
{
printf ("Error in exprange (test10)\n");
printf ("x = ");
mpfr_dump (x);
printf ("Expected inex1 = %d, flags1 = %u, ", SIGN (inex1), flags1);
mpfr_dump (y);
printf ("Got inex2 = %d, flags2 = %u, ", SIGN (inex2), flags2);
mpfr_dump (z);
exit (1);
}
mpfr_set_emin (emin);
mpfr_set_emax (emax);
mpfr_clears (x, y, z, (mpfr_ptr) 0);
}
static void
test_extreme (void)
{
mpfr_t x, y, z;
mpfr_exp_t emin, emax;
mpfr_prec_t p[4] = { 8, 32, 64, 256 };
int xi, yi, zi, j, r;
unsigned int flags, ex_flags;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_emax (MPFR_EMAX_MAX);
for (xi = 0; xi < 4; xi++)
{
mpfr_init2 (x, p[xi]);
mpfr_setmax (x, MPFR_EMAX_MAX);
MPFR_ASSERTN (mpfr_check (x));
for (yi = 0; yi < 4; yi++)
{
mpfr_init2 (y, p[yi]);
mpfr_setmin (y, MPFR_EMIN_MIN);
for (j = 0; j < 2; j++)
{
MPFR_ASSERTN (mpfr_check (y));
for (zi = 0; zi < 4; zi++)
{
mpfr_init2 (z, p[zi]);
RND_LOOP (r)
{
mpfr_clear_flags ();
mpfr_div (z, x, y, (mpfr_rnd_t) r);
flags = __gmpfr_flags;
MPFR_ASSERTN (mpfr_check (z));
ex_flags = MPFR_FLAGS_OVERFLOW | MPFR_FLAGS_INEXACT;
if (flags != ex_flags)
{
printf ("Bad flags in test_extreme on z = a/b"
" with %s and\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
printf ("a = ");
mpfr_dump (x);
printf ("b = ");
mpfr_dump (y);
printf ("Expected flags:");
flags_out (ex_flags);
printf ("Got flags: ");
flags_out (flags);
printf ("z = ");
mpfr_dump (z);
exit (1);
}
mpfr_clear_flags ();
mpfr_div (z, y, x, (mpfr_rnd_t) r);
flags = __gmpfr_flags;
MPFR_ASSERTN (mpfr_check (z));
ex_flags = MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT;
if (flags != ex_flags)
{
printf ("Bad flags in test_extreme on z = a/b"
" with %s and\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
printf ("a = ");
mpfr_dump (y);
printf ("b = ");
mpfr_dump (x);
printf ("Expected flags:");
flags_out (ex_flags);
printf ("Got flags: ");
flags_out (flags);
printf ("z = ");
mpfr_dump (z);
exit (1);
}
}
mpfr_clear (z);
} /* zi */
mpfr_nextabove (y);
} /* j */
mpfr_clear (y);
} /* yi */
mpfr_clear (x);
} /* xi */
set_emin (emin);
set_emax (emax);
}
int
main (int argc, char *argv[])
{
mpfr_t x;
long k, z, d, N;
unsigned long zl, dl;
int inex;
int r;
mpfr_exp_t emin, emax;
int flag;
tests_start_mpfr ();
mpfr_init2 (x, 100);
N = (argc==1) ? 100000 : atol (argv[1]);
for (k = 1; k <= N; k++)
{
z = (long) (randlimb () & LONG_MAX) + LONG_MIN / 2;
inex = mpfr_set_si (x, z, MPFR_RNDZ);
d = mpfr_get_si (x, MPFR_RNDZ);
if (d != z)
{
printf ("Error in mpfr_set_si: expected %ld got %ld\n", z, d);
exit (1);
}
if (inex)
{
printf ("Error in mpfr_set_si: inex value incorrect for %ld: %d\n",
z, inex);
exit (1);
}
}
for (k = 1; k <= N; k++)
{
zl = randlimb ();
inex = mpfr_set_ui (x, zl, MPFR_RNDZ);
dl = mpfr_get_ui (x, MPFR_RNDZ);
if (dl != zl)
{
printf ("Error in mpfr_set_ui: expected %lu got %lu\n", zl, dl);
exit (1);
}
if (inex)
{
printf ("Error in mpfr_set_ui: inex value incorrect for %lu: %d\n",
zl, inex);
exit (1);
}
}
mpfr_set_prec (x, 2);
if (mpfr_set_si (x, 5, MPFR_RNDZ) >= 0)
{
printf ("Wrong inexact flag for x=5, rnd=MPFR_RNDZ\n");
exit (1);
}
mpfr_set_prec (x, 2);
if (mpfr_set_si (x, -5, MPFR_RNDZ) <= 0)
{
printf ("Wrong inexact flag for x=-5, rnd=MPFR_RNDZ\n");
exit (1);
}
mpfr_set_prec (x, 3);
inex = mpfr_set_si (x, 77617, MPFR_RNDD); /* should be 65536 */
if (MPFR_MANT(x)[0] != ((mp_limb_t)1 << (mp_bits_per_limb-1))
|| inex >= 0)
{
printf ("Error in mpfr_set_si(x:3, 77617, MPFR_RNDD)\n");
mpfr_print_binary (x);
puts ("");
exit (1);
}
inex = mpfr_set_ui (x, 77617, MPFR_RNDD); /* should be 65536 */
if (MPFR_MANT(x)[0] != ((mp_limb_t)1 << (mp_bits_per_limb-1))
|| inex >= 0)
{
printf ("Error in mpfr_set_ui(x:3, 77617, MPFR_RNDD)\n");
mpfr_print_binary (x);
puts ("");
exit (1);
}
mpfr_set_prec (x, 2);
inex = mpfr_set_si (x, 33096, MPFR_RNDU);
if (mpfr_get_si (x, MPFR_RNDZ) != 49152 || inex <= 0)
{
printf ("Error in mpfr_set_si, exp. 49152, got %ld, inex %d\n",
mpfr_get_si (x, MPFR_RNDZ), inex);
exit (1);
}
inex = mpfr_set_ui (x, 33096, MPFR_RNDU);
if (mpfr_get_si (x, MPFR_RNDZ) != 49152)
{
printf ("Error in mpfr_set_ui, exp. 49152, got %ld, inex %d\n",
mpfr_get_si (x, MPFR_RNDZ), inex);
exit (1);
}
/* Also test the mpfr_set_ui function (instead of macro). */
inex = (mpfr_set_ui) (x, 33096, MPFR_RNDU);
if (mpfr_get_si (x, MPFR_RNDZ) != 49152)
{
printf ("Error in mpfr_set_ui function, exp. 49152, got %ld, inex %d\n",
mpfr_get_si (x, MPFR_RNDZ), inex);
exit (1);
}
for (r = 0 ; r < MPFR_RND_MAX ; r++)
{
mpfr_set_si (x, -1, (mpfr_rnd_t) r);
mpfr_set_ui (x, 0, (mpfr_rnd_t) r);
if (MPFR_IS_NEG (x) || mpfr_get_ui (x, (mpfr_rnd_t) r) != 0)
{
printf ("mpfr_set_ui (x, 0) gives -0 for %s\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
exit (1);
}
mpfr_set_si (x, -1, (mpfr_rnd_t) r);
mpfr_set_si (x, 0, (mpfr_rnd_t) r);
if (MPFR_IS_NEG (x) || mpfr_get_si (x, (mpfr_rnd_t) r) != 0)
{
printf ("mpfr_set_si (x, 0) gives -0 for %s\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r));
exit (1);
}
}
/* check potential bug in case mp_limb_t is unsigned */
emax = mpfr_get_emax ();
set_emax (0);
mpfr_set_si (x, -1, MPFR_RNDN);
if (mpfr_sgn (x) >= 0)
{
printf ("mpfr_set_si (x, -1) fails\n");
exit (1);
}
set_emax (emax);
emax = mpfr_get_emax ();
set_emax (5);
mpfr_set_prec (x, 2);
mpfr_set_si (x, -31, MPFR_RNDN);
if (mpfr_sgn (x) >= 0)
{
printf ("mpfr_set_si (x, -31) fails\n");
exit (1);
}
set_emax (emax);
/* test for get_ui */
mpfr_set_ui (x, 0, MPFR_RNDN);
MPFR_ASSERTN(mpfr_get_ui (x, MPFR_RNDN) == 0);
mpfr_set_ui (x, ULONG_MAX, MPFR_RNDU);
mpfr_nextabove (x);
mpfr_get_ui (x, MPFR_RNDU);
/* another test for get_ui */
mpfr_set_prec (x, 10);
mpfr_set_str_binary (x, "10.101");
dl = mpfr_get_ui (x, MPFR_RNDN);
MPFR_ASSERTN (dl == 3);
mpfr_set_str_binary (x, "-1.0");
mpfr_get_ui (x, MPFR_RNDN);
mpfr_set_str_binary (x, "0.1");
dl = mpfr_get_ui (x, MPFR_RNDN);
MPFR_ASSERTN (dl == 0);
dl = mpfr_get_ui (x, MPFR_RNDZ);
MPFR_ASSERTN (dl == 0);
dl = mpfr_get_ui (x, MPFR_RNDD);
MPFR_ASSERTN (dl == 0);
dl = mpfr_get_ui (x, MPFR_RNDU);
MPFR_ASSERTN (dl == 1);
/* coverage tests */
mpfr_set_prec (x, 2);
mpfr_set_si (x, -7, MPFR_RNDD);
MPFR_ASSERTN(mpfr_cmp_si (x, -8) == 0);
mpfr_set_prec (x, 2);
mpfr_set_ui (x, 7, MPFR_RNDU);
MPFR_ASSERTN(mpfr_cmp_ui (x, 8) == 0);
emax = mpfr_get_emax ();
set_emax (3);
mpfr_set_ui (x, 7, MPFR_RNDU);
MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
set_emax (1);
MPFR_ASSERTN( mpfr_set_ui (x, 7, MPFR_RNDU) );
MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0);
set_emax (emax);
mpfr_set_ui_2exp (x, 17, -50, MPFR_RNDN);
MPFR_ASSERTN (mpfr_get_ui (x, MPFR_RNDD) == 0);
MPFR_ASSERTN (mpfr_get_si (x, MPFR_RNDD) == 0);
/* Test for ERANGE flag + correct behaviour if overflow */
mpfr_set_prec (x, 256);
mpfr_set_ui (x, ULONG_MAX, MPFR_RNDN);
mpfr_clear_erangeflag ();
dl = mpfr_get_ui (x, MPFR_RNDN);
if (dl != ULONG_MAX || mpfr_erangeflag_p ())
{
printf ("ERROR for get_ui + ERANGE + ULONG_MAX (1)\n");
exit (1);
}
mpfr_add_ui (x, x, 1, MPFR_RNDN);
dl = mpfr_get_ui (x, MPFR_RNDN);
if (dl != ULONG_MAX || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_ui + ERANGE + ULONG_MAX (2)\n");
exit (1);
}
mpfr_set_si (x, -1, MPFR_RNDN);
mpfr_clear_erangeflag ();
dl = mpfr_get_ui (x, MPFR_RNDN);
if (dl != 0 || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_ui + ERANGE + -1 \n");
exit (1);
}
mpfr_set_si (x, LONG_MAX, MPFR_RNDN);
mpfr_clear_erangeflag ();
d = mpfr_get_si (x, MPFR_RNDN);
if (d != LONG_MAX || mpfr_erangeflag_p ())
{
printf ("ERROR for get_si + ERANGE + LONG_MAX (1): %ld\n", d);
exit (1);
}
mpfr_add_ui (x, x, 1, MPFR_RNDN);
d = mpfr_get_si (x, MPFR_RNDN);
if (d != LONG_MAX || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_si + ERANGE + LONG_MAX (2)\n");
exit (1);
}
mpfr_set_si (x, LONG_MIN, MPFR_RNDN);
mpfr_clear_erangeflag ();
d = mpfr_get_si (x, MPFR_RNDN);
if (d != LONG_MIN || mpfr_erangeflag_p ())
{
printf ("ERROR for get_si + ERANGE + LONG_MIN (1)\n");
exit (1);
}
mpfr_sub_ui (x, x, 1, MPFR_RNDN);
d = mpfr_get_si (x, MPFR_RNDN);
if (d != LONG_MIN || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_si + ERANGE + LONG_MIN (2)\n");
exit (1);
}
mpfr_set_nan (x);
mpfr_clear_erangeflag ();
d = mpfr_get_ui (x, MPFR_RNDN);
if (d != 0 || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_ui + NaN\n");
exit (1);
}
mpfr_clear_erangeflag ();
d = mpfr_get_si (x, MPFR_RNDN);
if (d != 0 || !mpfr_erangeflag_p ())
{
printf ("ERROR for get_si + NaN\n");
exit (1);
}
emin = mpfr_get_emin ();
mpfr_set_prec (x, 2);
mpfr_set_emin (4);
mpfr_clear_flags ();
mpfr_set_ui (x, 7, MPFR_RNDU);
flag = mpfr_underflow_p ();
mpfr_set_emin (emin);
if (mpfr_cmp_ui (x, 8) != 0)
{
printf ("Error for mpfr_set_ui (x, 7, MPFR_RNDU), prec = 2, emin = 4\n");
exit (1);
}
if (flag)
{
printf ("mpfr_set_ui (x, 7, MPFR_RNDU) should not underflow "
"with prec = 2, emin = 4\n");
exit (1);
}
mpfr_set_emin (4);
mpfr_clear_flags ();
mpfr_set_si (x, -7, MPFR_RNDD);
flag = mpfr_underflow_p ();
mpfr_set_emin (emin);
if (mpfr_cmp_si (x, -8) != 0)
{
printf ("Error for mpfr_set_si (x, -7, MPFR_RNDD), prec = 2, emin = 4\n");
exit (1);
}
if (flag)
{
printf ("mpfr_set_si (x, -7, MPFR_RNDD) should not underflow "
"with prec = 2, emin = 4\n");
exit (1);
}
mpfr_clear (x);
test_2exp ();
test_macros ();
test_macros_keyword ();
tests_end_mpfr ();
return 0;
}
static void
consistency (void)
{
mpfr_t x, s1, s2, c1, c2;
mpfr_exp_t emin, emax;
mpfr_rnd_t rnd;
unsigned int flags_sin, flags_cos, flags, flags_before, flags_ref;
int inex_sin, is, inex_cos, ic, inex, inex_ref;
int i;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
for (i = 0; i <= 10000; i++)
{
mpfr_init2 (x, MPFR_PREC_MIN + (randlimb () % 8));
mpfr_inits2 (MPFR_PREC_MIN + (randlimb () % 8), s1, s2, c1, c2,
(mpfr_ptr) 0);
if (i < 8 * MPFR_RND_MAX)
{
int j = i / MPFR_RND_MAX;
if (j & 1)
mpfr_set_emin (MPFR_EMIN_MIN);
mpfr_set_si (x, (j & 2) ? 1 : -1, MPFR_RNDN);
mpfr_set_exp (x, mpfr_get_emin ());
rnd = (mpfr_rnd_t) (i % MPFR_RND_MAX);
flags_before = 0;
if (j & 4)
mpfr_set_emax (-17);
}
else
{
tests_default_random (x, 256, -5, 50, 0);
rnd = RND_RAND ();
flags_before = (randlimb () & 1) ?
(unsigned int) (MPFR_FLAGS_ALL ^ MPFR_FLAGS_ERANGE) :
(unsigned int) 0;
}
__gmpfr_flags = flags_before;
inex_sin = mpfr_sin (s1, x, rnd);
is = inex_sin < 0 ? 2 : inex_sin > 0 ? 1 : 0;
flags_sin = __gmpfr_flags;
__gmpfr_flags = flags_before;
inex_cos = mpfr_cos (c1, x, rnd);
ic = inex_cos < 0 ? 2 : inex_cos > 0 ? 1 : 0;
flags_cos = __gmpfr_flags;
__gmpfr_flags = flags_before;
inex = mpfr_sin_cos (s2, c2, x, rnd);
flags = __gmpfr_flags;
inex_ref = is + 4 * ic;
flags_ref = flags_sin | flags_cos;
if (!(mpfr_equal_p (s1, s2) && mpfr_equal_p (c1, c2)) ||
inex != inex_ref || flags != flags_ref)
{
printf ("mpfr_sin_cos and mpfr_sin/mpfr_cos disagree on %s,"
" i = %d\nx = ", mpfr_print_rnd_mode (rnd), i);
mpfr_dump (x);
printf ("s1 = ");
mpfr_dump (s1);
printf ("s2 = ");
mpfr_dump (s2);
printf ("c1 = ");
mpfr_dump (c1);
printf ("c2 = ");
mpfr_dump (c2);
printf ("inex_sin = %d (s = %d), inex_cos = %d (c = %d), "
"inex = %d (expected %d)\n",
inex_sin, is, inex_cos, ic, inex, inex_ref);
printf ("flags_sin = 0x%x, flags_cos = 0x%x, "
"flags = 0x%x (expected 0x%x)\n",
flags_sin, flags_cos, flags, flags_ref);
exit (1);
}
mpfr_clears (x, s1, s2, c1, c2, (mpfr_ptr) 0);
mpfr_set_emin (emin);
mpfr_set_emax (emax);
}
}