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/* Test file for mpfr_add_ui
Copyright 2000, 2001, 2002, 2003 Free Software Foundation.
This file is part of the MPFR Library.
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., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <time.h>
#include "mpfr-test.h"
#define check(x,y,r) check3(x,y,r,0.0)
/* checks that x+y gives the same results in double
and with mpfr with 53 bits of precision */
static void
check3 (double x, unsigned long y, unsigned int rnd_mode, double z1)
{
double z2;
mpfr_t xx, zz;
mpfr_init2 (xx, 53);
mpfr_init2 (zz, 53);
mpfr_set_d (xx, x, rnd_mode);
mpfr_add_ui (zz, xx, y, rnd_mode);
z2 = mpfr_get_d1 (zz);
if (z1 != z2 && !(Isnan(z1) && Isnan(z2)))
{
printf ("expected sum is %1.20e, got %1.20e\n",z1,z2);
printf ("mpfr_add_ui failed for x=%1.20e y=%lu with rnd_mode=%s\n",
x, y, mpfr_print_rnd_mode(rnd_mode));
exit (1);
}
mpfr_clear (xx);
mpfr_clear (zz);
}
static void
special (void)
{
mpfr_t x, y;
mpfr_init2 (x, 63);
mpfr_init2 (y, 63);
mpfr_set_str_binary (x, "0.110100000000000001110001110010111111000000000101100011100100011");
mpfr_add_ui (y, x, 1, GMP_RNDD);
mpfr_clear (x);
mpfr_clear (y);
}
static void
check_nans (void)
{
mpfr_t x, y;
mpfr_init2 (x, 123L);
mpfr_init2 (y, 123L);
/* nan + 2394875 == nan */
mpfr_set_nan (x);
mpfr_add_ui (y, x, 2394875L, GMP_RNDN);
ASSERT_ALWAYS (mpfr_nan_p (y));
/* +inf + 2394875 == +inf */
mpfr_set_inf (x, 1);
mpfr_add_ui (y, x, 2394875L, GMP_RNDN);
ASSERT_ALWAYS (mpfr_inf_p (y));
ASSERT_ALWAYS (mpfr_sgn (y) > 0);
/* -inf + 2394875 == -inf */
mpfr_set_inf (x, -1);
mpfr_add_ui (y, x, 2394875L, GMP_RNDN);
ASSERT_ALWAYS (mpfr_inf_p (y));
ASSERT_ALWAYS (mpfr_sgn (y) < 0);
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
check_nans ();
special ();
check3 (-1.716113812768534e-140, 1271212614, GMP_RNDZ,
1.27121261399999976e9);
check3 (1.22191250737771397120e+20, 948002822, GMP_RNDN,
122191250738719408128.0);
check3 (-6.72658901114033715233e-165, 2000878121, GMP_RNDZ,
2.0008781209999997615e9);
check3 (-2.0769715792901673e-5, 880524, GMP_RNDN, 8.8052399997923023e5);
tests_end_mpfr ();
return 0;
}
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