Copyright 2005, 2006, 2007 Free Software Foundation, Inc.
Contributed by the Arenaire and Cacao projects, INRIA.
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., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <limits.h>
#include "mpfr-test.h"
into a mpf_t number (test with various precisions and exponents). */
static void
prec_test (void)
{
int px, py;
for (py = 3; py <= 136; py++)
{
mpfr_t y1, y2, y3;
mpfr_init2 (y1, py);
mpfr_init2 (y2, py);
mpfr_init2 (y3, py);
for (px = 32; px <= 160; px += 32)
{
mpf_t x1, x2, x3;
int e;
mpf_init (x1);
mpf_init (x2);
mpf_init (x3);
mpfr_set_ui_2exp (y1, 1, py - 1, GMP_RNDN);
mpfr_get_f (x1, y1, GMP_RNDN);
mpf_set (x2, x1);
mpfr_set (y2, y1, GMP_RNDN);
for (e = py - 2; e >= 0; e--)
{
int inex;
mpf_div_2exp (x2, x2, 1);
mpf_add (x1, x1, x2);
mpfr_div_2exp (y2, y2, 1, GMP_RNDN);
inex = mpfr_add (y1, y1, y2, GMP_RNDN);
MPFR_ASSERTN (inex == 0);
mpfr_set_f (y3, x1, GMP_RNDN);
if (! mpfr_equal_p (y1, y3))
break;
mpfr_get_f (x3, y3, GMP_RNDN);
if (mpf_cmp (x1, x3) != 0)
{
printf ("Error in prec_test (px = %d, py = %d, e = %d)\n",
px, py, e);
printf ("x1 = ");
mpf_out_str (stdout, 16, 0, x1);
printf ("\nx2 = ");
mpf_out_str (stdout, 16, 0, x1);
printf ("\n");
exit (1);
}
}
mpf_clear (x1);
mpf_clear (x2);
mpf_clear (x3);
}
mpfr_clear (y1);
mpfr_clear (y2);
mpfr_clear (y3);
}
}
int
main (void)
{
mpf_t x;
mpfr_t y, z;
unsigned long i;
mp_exp_t e;
int inex;
MPFR_TEST_USE_RANDS ();
tests_start_mpfr ();
mpfr_init (y);
mpfr_init (z);
mpf_init (x);
mpfr_set_nan (y);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(NaN) should fail\n");
exit (1);
}
mpfr_set_inf (y, 1);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(+Inf) should fail\n");
exit (1);
}
mpfr_set_inf (y, -1);
if (mpfr_get_f (x, y, GMP_RNDN) == 0)
{
printf ("Error: mpfr_get_f(-Inf) should fail\n");
exit (1);
}
mpfr_set_ui (y, 0, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, 0))
{
printf ("Error: mpfr_get_f(+0) fails\n");
exit (1);
}
mpfr_set_ui (y, 0, GMP_RNDN);
mpfr_neg (y, y, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, 0))
{
printf ("Error: mpfr_get_f(-0) fails\n");
exit (1);
}
i = 1;
while (i)
{
mpfr_set_ui (y, i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, i))
{
printf ("Error: mpfr_get_f(%lu) fails\n", i);
exit (1);
}
if (i <= - (unsigned long) LONG_MIN)
{
long j = i < - (unsigned long) LONG_MIN ? - (long) i : LONG_MIN;
mpfr_set_si (y, j, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_si (x, j))
{
printf ("Error: mpfr_get_f(-%lu) fails\n", i);
exit (1);
}
}
i *= 2;
}
round it */
mpfr_set_prec (y, 100);
i = 1;
while (i)
{
mpfr_set_ui (y, i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_ui (x, i))
{
printf ("Error: mpfr_get_f(%lu) fails\n", i);
exit (1);
}
mpfr_set_si (y, (signed long) -i, GMP_RNDN);
if (mpfr_get_f (x, y, GMP_RNDN) || mpf_cmp_si (x, (signed long) -i))
{
printf ("Error: mpfr_get_f(-%lu) fails\n", i);
exit (1);
}
i *= 2;
}
for (e = 0; e <= 2 * BITS_PER_MP_LIMB; e++)
{
mpfr_set_ui (y, 1, GMP_RNDN);
mpfr_div_2exp (y, y, e, GMP_RNDN);
mpfr_get_f (x, y, GMP_RNDN);
mpf_mul_2exp (x, x, e);
if (mpf_cmp_ui (x, 1) != 0)
{
printf ("Error: mpfr_get_f(x,y,GMP_RNDN) fails\n");
printf ("y=");
mpfr_dump (y);
printf ("x=");
mpf_div_2exp (x, x, e);
mpf_dump (x);
exit (1);
}
mpfr_set_ui (y, 1, GMP_RNDN);
mpfr_mul_2exp (y, y, e, GMP_RNDN);
mpfr_get_f (x, y, GMP_RNDN);
mpf_div_2exp (x, x, e);
if (mpf_cmp_ui (x, 1) != 0)
{
printf ("Error: mpfr_get_f(x,y,GMP_RNDN) fails\n");
printf ("y=");
mpfr_dump (y);
printf ("x=");
mpf_mul_2exp (x, x, e);
mpf_dump (x);
exit (1);
}
}
mpfr_set_prec (y, 32);
mpfr_set_prec (z, 32);
mpf_set_prec (x, 32);
mpfr_set_ui_2exp (y, 0xc1234567, -30, GMP_RNDN);
mpfr_get_f (x, y, GMP_RNDN);
inex = mpfr_set_f (z, x, GMP_RNDN);
if (inex || ! mpfr_equal_p (y, z))
{
printf ("Error in mpfr_get_f:\n inex = %d, y = ", inex);
mpfr_dump (z);
printf ("Expected:\n inex = 0, y = ");
mpfr_dump (y);
exit (1);
}
mpfr_clear (y);
mpfr_clear (z);
mpf_clear (x);
prec_test ();
tests_end_mpfr ();
return 0;
}
