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/* Test file for mpfr_dim.
Copyright 2004-2025 Free Software Foundation, Inc.
Contributed by the Pascaline 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/>. */
#include "mpfr-test.h"
#define TEST_FUNCTION mpfr_dim
#define TWO_ARGS
#define TEST_RANDOM_EMIN -20
#define TEST_RANDOM_EMAX 20
#define TGENERIC_NOWARNING 1
#include "tgeneric.c"
int
main (void)
{
mpfr_t x, y, z;
tests_start_mpfr ();
mpfr_init (x);
mpfr_init (y);
mpfr_init (z);
/* case x=NaN */
mpfr_set_nan (x);
mpfr_set_ui (y, 0, MPFR_RNDN);
mpfr_dim (z, x, y, MPFR_RNDN);
if (!mpfr_nan_p (z))
{
printf ("Error in mpfr_dim (NaN, 0)\n");
exit (1);
}
/* case x=+Inf */
mpfr_set_inf (x, 1);
mpfr_set_ui (y, 0, MPFR_RNDN);
mpfr_dim (z, x, y, MPFR_RNDN);
if (!mpfr_inf_p (z) || mpfr_sgn (z) < 0)
{
printf ("Error in mpfr_dim (+Inf, 0)\n");
exit (1);
}
/* case x=-Inf */
mpfr_set_inf (x, -1);
mpfr_set_ui (y, 0, MPFR_RNDN);
mpfr_dim (z, x, y, MPFR_RNDN);
if (MPFR_NOTZERO (z) || MPFR_IS_NEG (z))
{
printf ("Error in mpfr_dim (-Inf, 0)\n");
exit (1);
}
/* case x=y=+Inf */
mpfr_set_inf (x, 1);
mpfr_set_inf (y, 1);
mpfr_dim (z, x, y, MPFR_RNDN);
if (MPFR_NOTZERO (z) || MPFR_IS_NEG (z))
{
printf ("Error in mpfr_dim (+Inf, +Inf)\n");
exit (1);
}
/* case x > y */
mpfr_set_ui (x, 2, MPFR_RNDN);
mpfr_set_ui (y, 1, MPFR_RNDN);
mpfr_dim (z, x, y, MPFR_RNDN);
if (mpfr_cmp_ui (z, 1))
{
printf ("Error in mpfr_dim (2, 1)\n");
exit (1);
}
/* case x < y */
mpfr_set_ui (x, 1, MPFR_RNDN);
mpfr_set_ui (y, 2, MPFR_RNDN);
mpfr_dim (z, x, y, MPFR_RNDN);
if (mpfr_cmp_ui (z, 0))
{
printf ("Error in mpfr_dim (1, 2)\n");
exit (1);
}
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
test_generic (MPFR_PREC_MIN, 220, 42);
tests_end_mpfr ();
return 0;
}
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