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/* Generic test file for functions with one mpfr_t argument and an integer.
Copyright 2005-2021 Free Software Foundation, Inc.
Contributed by the AriC and Caramba projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
/* define INTEGER_TYPE to what we want */
#ifndef INTEGER_TYPE
# define INTEGER_TYPE mp_limb_t
#endif
#ifndef RAND_FUNCTION
# define RAND_FUNCTION(x) mpfr_urandomb ((x), RANDS)
#endif
#ifndef INT_RAND_FUNCTION
# define INT_RAND_FUNCTION() (INTEGER_TYPE) randlimb ()
#endif
static void
test_generic_ui (mpfr_prec_t p0, mpfr_prec_t p1, unsigned int N)
{
mpfr_prec_t prec, yprec;
mpfr_t x, y, z, t;
INTEGER_TYPE u;
mpfr_rnd_t rnd;
int inexact, compare, compare2;
unsigned int n;
mpfr_init (x);
mpfr_init (y);
mpfr_init (z);
mpfr_init (t);
/* generic test */
for (prec = p0; prec <= p1; prec++)
{
mpfr_set_prec (x, prec);
mpfr_set_prec (z, prec);
mpfr_set_prec (t, prec);
yprec = prec + 10;
for (n = 0; n <= N; n++)
{
if (n > 1 || prec < p1)
RAND_FUNCTION (x);
else
{
/* Special cases tested in precision p1 if n <= 1. */
mpfr_set_si (x, n == 0 ? 1 : -1, MPFR_RNDN);
mpfr_set_exp (x, mpfr_get_emin ());
}
if (n < 2 || n > 3 || prec < p1)
u = INT_RAND_FUNCTION ();
else
{
/* Special cases tested in precision p1 if n = 2 or 3. */
if ((INTEGER_TYPE) -1 < 0) /* signed, type long assumed */
u = n == 2 ? LONG_MIN : LONG_MAX;
else /* unsigned */
u = n == 2 ? 0 : -1;
}
rnd = RND_RAND_NO_RNDF ();
mpfr_set_prec (y, yprec);
compare = TEST_FUNCTION (y, x, u, rnd);
if (mpfr_can_round (y, yprec, rnd, rnd, prec))
{
mpfr_set (t, y, rnd);
inexact = TEST_FUNCTION (z, x, u, rnd);
if (mpfr_cmp (t, z))
{
printf ("results differ for x=");
mpfr_out_str (stdout, 2, prec, x, MPFR_RNDN);
printf ("\nu=%lu", (unsigned long) u);
printf (" prec=%lu rnd_mode=%s\n",
(unsigned long ) prec, mpfr_print_rnd_mode (rnd));
#ifdef TEST_FUNCTION_NAME
printf ("Function: %s\n", TEST_FUNCTION_NAME);
#endif
printf ("got ");
mpfr_dump (z);
printf ("expected ");
mpfr_dump (t);
printf ("approx ");
mpfr_dump (y);
exit (1);
}
compare2 = mpfr_cmp (t, y);
/* if rounding to nearest, cannot know the sign of t - f(x)
because of composed rounding: y = o(f(x)) and t = o(y) */
if (compare * compare2 >= 0)
compare = compare + compare2;
else
compare = inexact; /* cannot determine sign(t-f(x)) */
if (! SAME_SIGN (inexact, compare) && rnd != MPFR_RNDF)
{
printf ("Wrong inexact flag for rnd=%s: expected %d, got %d"
"\n", mpfr_print_rnd_mode (rnd), compare, inexact);
printf ("x = "); mpfr_dump (x);
printf ("u = %lu\n", (unsigned long) u);
printf ("y = "); mpfr_dump (y);
printf ("t = "); mpfr_dump (t);
exit (1);
}
}
}
}
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
mpfr_clear (t);
}
#undef RAND_FUNCTION
#undef INTEGER_TYPE
#undef TEST_FUNCTION
#undef TEST_FUNCTION_NAME
#undef test_generic_ui
#undef INT_RAND_FUNCTION
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