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/* Test file for mpfr_abs.
Copyright 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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 Place, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include "mpfr-test.h"
static void
check_inexact (void)
{
mp_prec_t p, q;
mpfr_t x, y, absx;
int rnd;
int inexact, cmp;
mpfr_init (x);
mpfr_init (y);
mpfr_init (absx);
for (p=2; p<500; p++)
{
mpfr_set_prec (x, p);
mpfr_set_prec (absx, p);
mpfr_random (x);
if (randlimb () % 2)
{
mpfr_set (absx, x, GMP_RNDN);
mpfr_neg (x, x, GMP_RNDN);
}
else
mpfr_set (absx, x, GMP_RNDN);
for (q=2; q<2*p; q++)
{
mpfr_set_prec (y, q);
for (rnd = 0; rnd < GMP_RND_MAX; rnd++)
{
inexact = mpfr_abs (y, x, (mp_rnd_t) rnd);
cmp = mpfr_cmp (y, absx);
if (((inexact == 0) && (cmp != 0)) ||
((inexact > 0) && (cmp <= 0)) ||
((inexact < 0) && (cmp >= 0)))
{
printf ("Wrong inexact flag: expected %d, got %d\n",
cmp, inexact);
printf ("x="); mpfr_print_binary (x); puts ("");
printf ("absx="); mpfr_print_binary (absx); puts ("");
printf ("y="); mpfr_print_binary (y); puts ("");
exit (1);
}
}
}
}
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (absx);
}
static void
check_cmp(int argc, char *argv[])
{
mpfr_t x, y;
int n, k, rnd;
mpfr_inits2(53, x, y, NULL);
mpfr_set_ui(x, 1, GMP_RNDN);
(mpfr_abs) (x, x, GMP_RNDN);
if (mpfr_cmp_ui (x, 1))
{
printf ("Error in mpfr_abs(1.0)\n");
exit (1);
}
mpfr_set_si(x, -1, GMP_RNDN);
mpfr_abs(x, x, GMP_RNDN);
if (mpfr_cmp_ui (x, 1))
{
printf ("Error in mpfr_abs(1.0)\n");
exit (1);
}
mpfr_set_si(x, -1, GMP_RNDN);
mpfr_abs(x, x, GMP_RNDN);
if (mpfr_cmp_ui (x, 1))
{
printf ("Error in mpfr_abs(-1.0)\n");
exit (1);
}
mpfr_set_inf (x, 1);
mpfr_abs (x, x, GMP_RNDN);
if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0))
{
printf ("Error in mpfr_abs(Inf).\n");
exit (1);
}
mpfr_set_inf (x, -1);
mpfr_abs (x, x, GMP_RNDN);
if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0))
{
printf ("Error in mpfr_abs(-Inf).\n");
exit (1);
}
MPFR_SET_NAN(x);
mpfr_abs (x, x, GMP_RNDN);
if (!MPFR_IS_NAN(x))
{
printf ("Error in mpfr_abs(NAN).\n");
exit (1);
}
n = (argc==1) ? 25000 : atoi(argv[1]);
for (k = 1; k <= n; k++)
{
int sign = SIGN_RAND();
mpfr_random(x);
MPFR_SET_SIGN(x, sign);
rnd = RND_RAND();
mpfr_abs(y, x, (mp_rnd_t) rnd);
MPFR_SET_POS(x);
if (mpfr_cmp(x,y))
{
printf ("Mismatch for sign=%d and x=", sign);
mpfr_print_binary(x);
printf ("\nResults=");
mpfr_print_binary(y);
putchar ('\n');
exit (1);
}
}
mpfr_clears(x, y, NULL);
}
int
main (int argc, char *argv[])
{
mpfr_test_init ();
tests_start_mpfr ();
check_inexact ();
check_cmp (argc, argv);
tests_end_mpfr ();
return 0;
}
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