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/* Test file for mpfr_fmma and mpfr_fmms.
Copyright 2016 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
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-test.h"
/* TODO: add more tests, with special values and exception checking. */
/* check both mpfr_fmma and mpfr_fmms */
static void
random_test (mpfr_t a, mpfr_t b, mpfr_t c, mpfr_t d, mpfr_rnd_t rnd)
{
mpfr_t ref, res, ab, cd;
int inex_ref, inex_res;
mpfr_prec_t p = MPFR_PREC(a);
mpfr_init2 (res, p);
mpfr_init2 (ref, p);
mpfr_init2 (ab, mpfr_get_prec (a) + mpfr_get_prec (b));
mpfr_init2 (cd, mpfr_get_prec (c) + mpfr_get_prec (d));
/* first check fmma */
inex_res = mpfr_fmma (res, a, b, c, d, rnd);
mpfr_mul (ab, a, b, rnd);
mpfr_mul (cd, c, d, rnd);
inex_ref = mpfr_add (ref, ab, cd, rnd);
if (! SAME_SIGN (inex_res, inex_ref) ||
mpfr_nan_p (res) || mpfr_nan_p (ref) ||
! mpfr_equal_p (res, ref))
{
printf ("mpfr_fmma failed for p=%ld rnd=%s\n",
(long int) p, mpfr_print_rnd_mode (rnd));
printf ("a="); mpfr_dump (a);
printf ("b="); mpfr_dump (b);
printf ("c="); mpfr_dump (c);
printf ("d="); mpfr_dump (d);
printf ("Expected\n ");
mpfr_dump (ref);
printf (" with inex = %d\n", inex_ref);
printf ("Got\n ");
mpfr_dump (res);
printf (" with inex = %d\n", inex_res);
exit (1);
}
/* then check fmms */
inex_res = mpfr_fmms (res, a, b, c, d, rnd);
mpfr_mul (ab, a, b, rnd);
mpfr_mul (cd, c, d, rnd);
inex_ref = mpfr_sub (ref, ab, cd, rnd);
if (! SAME_SIGN (inex_res, inex_ref) ||
mpfr_nan_p (res) || mpfr_nan_p (ref) ||
! mpfr_equal_p (res, ref))
{
printf ("mpfr_fmms failed for p=%ld rnd=%s\n",
(long int) p, mpfr_print_rnd_mode (rnd));
printf ("a="); mpfr_dump (a);
printf ("b="); mpfr_dump (b);
printf ("c="); mpfr_dump (c);
printf ("d="); mpfr_dump (d);
printf ("Expected\n ");
mpfr_dump (ref);
printf (" with inex = %d\n", inex_ref);
printf ("Got\n ");
mpfr_dump (res);
printf (" with inex = %d\n", inex_res);
exit (1);
}
mpfr_clear (ab);
mpfr_clear (cd);
mpfr_clear (res);
mpfr_clear (ref);
}
static void
random_tests (void)
{
mpfr_prec_t p;
int r;
mpfr_t a, b, c, d;
for (p = MPFR_PREC_MIN; p <= 4096; p++)
{
mpfr_inits2 (p, a, b, c, d, (mpfr_ptr) 0);
mpfr_urandomb (a, RANDS);
mpfr_urandomb (b, RANDS);
mpfr_urandomb (c, RANDS);
mpfr_urandomb (d, RANDS);
RND_LOOP (r)
random_test (a, b, c, d, (mpfr_rnd_t) r);
mpfr_clears (a, b, c, d, (mpfr_ptr) 0);
}
}
static void
zero_tests (void)
{
mpfr_exp_t emin, emax;
mpfr_t a, b, c, d, res;
int i, r;
emin = mpfr_get_emin ();
emax = mpfr_get_emax ();
set_emin (MPFR_EMIN_MIN);
set_emax (MPFR_EMAX_MAX);
mpfr_inits2 (64, a, b, c, d, res, (mpfr_ptr) 0);
for (i = 0; i <= 4; i++)
{
switch (i)
{
case 0: case 1:
mpfr_set_ui (a, i, MPFR_RNDN);
break;
case 2:
mpfr_setmax (a, MPFR_EMAX_MAX);
break;
case 3:
mpfr_setmin (a, MPFR_EMIN_MIN);
break;
case 4:
mpfr_setmin (a, MPFR_EMIN_MIN+1);
break;
}
RND_LOOP (r)
{
int inex;
mpfr_flags_t flags;
mpfr_set (b, a, MPFR_RNDN);
mpfr_set (c, a, MPFR_RNDN);
mpfr_neg (d, a, MPFR_RNDN);
mpfr_clear_flags ();
inex = mpfr_fmma (res, a, b, c, d, (mpfr_rnd_t) r);
flags = __gmpfr_flags;
if (flags != 0 || inex != 0 || ! mpfr_zero_p (res) ||
(r == MPFR_RNDD ? MPFR_IS_POS (res) : MPFR_IS_NEG (res)))
{
printf ("Error in zero_tests on i = %d, %s\n",
i, mpfr_print_rnd_mode ((mpfr_rnd_t) r));
printf ("Expected %c0, inex = 0\n", r == MPFR_RNDD ? '-' : '+');
printf ("Got ");
if (MPFR_IS_POS (res))
printf ("+");
mpfr_out_str (stdout, 16, 0, res, MPFR_RNDN);
printf (", inex = %d\n", inex);
printf ("Expected flags:");
flags_out (0);
printf ("Got flags: ");
flags_out (flags);
exit (1);
}
}
}
mpfr_clears (a, b, c, d, res, (mpfr_ptr) 0);
set_emin (emin);
set_emax (emax);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
random_tests ();
zero_tests ();
tests_end_mpfr ();
return 0;
}
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