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/* mpfr_tli2 -- test file for dilogarithm function
Copyright 2007 Free Software Foundation, Inc.
Contributed by the Arenaire and Cacao projects, INRIA.
The 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 2.1 of the License, or (at your
option) any later version.
The 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 MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include "mpfr-test.h"
#if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0)
#define TEST_FUNCTION mpfr_li2
#include "tgeneric.c"
static void
special (void)
{
mpfr_t x, y;
mpfr_init (x);
mpfr_init (y);
mpfr_set_nan (x);
mpfr_li2 (y, x, GMP_RNDN);
if (!mpfr_nan_p (y))
{
printf ("Error for li2(NaN)\n");
exit (1);
}
mpfr_set_inf (x, -1);
mpfr_li2 (y, x, GMP_RNDN);
if (!mpfr_inf_p (y) || mpfr_sgn (y) > 0)
{
printf ("Error for li2(-Inf)\n");
exit (1);
}
mpfr_set_inf (x, 1);
mpfr_li2 (y, x, GMP_RNDN);
if (!mpfr_inf_p (y) || mpfr_sgn (y) > 0)
{
printf ("Error for li2(+Inf)\n");
exit (1);
}
mpfr_set_ui (x, 0, GMP_RNDN);
mpfr_li2 (y, x, GMP_RNDN);
if (!mpfr_zero_p (y) || mpfr_sgn (y) < 0)
{
printf ("Error for li2(+0)\n");
exit (1);
}
mpfr_set_ui (x, 0, GMP_RNDN);
mpfr_neg (x, x, GMP_RNDN);
mpfr_li2 (y, x, GMP_RNDN);
if (!mpfr_zero_p (y) || mpfr_sgn (y) > 0)
{
printf ("Error for li2(-0)\n");
exit (1);
}
mpfr_clear (x);
mpfr_clear (y);
}
static void
normal (void)
{
mpfr_t x, y;
mpfr_init (x);
mpfr_init (y);
/* x1 = 2^-3 */
mpfr_set_str (x, "1e-3", 2, GMP_RNDD);
mpfr_set_str_binary (y, "1.0000100001111010011110101001111001000010000101000001e-3");
mpfr_li2 (x, x, GMP_RNDN);
if (!mpfr_equal_p (x, y))
{
printf ("Error for li2(x1)\n");
exit (1);
}
/* check MPFR_FAST_COMPUTE_IF_SMALL_INPUT */
mpfr_set_prec (x, 2);
mpfr_set_prec (y, 20);
mpfr_set_ui_2exp (x, 1, -21, GMP_RNDN);
mpfr_li2 (y, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_cmp (y, x) == 0);
mpfr_set_si_2exp (x, -1, -21, GMP_RNDN);
mpfr_li2 (y, x, GMP_RNDN);
MPFR_ASSERTN(mpfr_cmp (y, x) == 0);
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
special ();
normal ();
test_generic (2, 100, 2);
data_check ("data/li2", mpfr_li2, "mpfr_li2");
tests_end_mpfr ();
return 0;
}
#else
int
main (void)
{
printf ("Warning! Test disabled for this MPFR version.\n");
return 0;
}
#endif
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