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+/* Test file for mpfr_eq.
+
+Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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
+http://www.gnu.org/licenses/ or 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"
+
+static void
+teq (mpfr_t x)
+{
+ mpfr_t y;
+ unsigned long k, px, mx;
+
+ mpfr_init2 (y, MPFR_PREC(x));
+
+ mx = (MPFR_PREC(x) - 1) / mp_bits_per_limb;
+ px = mp_bits_per_limb - 2;
+
+ for (k = 2; k < MPFR_PREC(x); k++)
+ {
+ mpfr_set (y, x, MPFR_RNDN);
+
+ MPFR_MANT(y) [mx] ^= (mp_limb_t) 1 << px;
+
+ if (mpfr_eq(y, x, k) || !mpfr_eq(y, x, k - 1))
+ {
+ printf ("Error in eq.\n");
+ printf ("x = "); mpfr_print_binary (x); printf ("\n");
+ printf ("y = "); mpfr_print_binary (y); printf ("\n");
+ printf ("k = %lu\n", k);
+ printf ("mpfr_eq(y, x, k) = %d\nmpfr_eq(y, x, k - 1) = %d\n",
+ mpfr_eq (y, x, k), mpfr_eq (y, x, k - 1));
+ exit (1);
+ }
+
+ if (px)
+ {
+ --px;
+ }
+ else
+ {
+ --mx;
+ px = mp_bits_per_limb - 1;
+ }
+ }
+ mpfr_clear (y);
+}
+
+static void
+special (void)
+{
+ mpfr_t x, y, z;
+ int i, error = 0;
+
+ mpfr_init2 (x, 53);
+ mpfr_init2 (y, 53);
+ mpfr_init2 (z, 53);
+
+ mpfr_set_str (x, "1", 10, (mpfr_rnd_t) 0);
+ mpfr_set_str (y, "1e-10000", 10, (mpfr_rnd_t) 0);
+ mpfr_add (z, x, y, MPFR_RNDU);
+
+ for (i = 1; i <= 52; i++)
+ if (mpfr_eq (x, z, i) == 0)
+ error = 1;
+ for (i = 53; i <= 100; i++)
+ if (mpfr_eq (x, z, i) != 0)
+ error = 1;
+ if (mpfr_eq (x, z, 1000) != 0)
+ error = 1;
+
+ if (error)
+ {
+ printf ("Error in mpfr_eq (1, 1+1e-1000)\n");
+ exit (1);
+ }
+
+ mpfr_set_nan (x);
+ mpfr_set_nan (y);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_inf (y, 1);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_ui (y, 0, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_inf (x, 1);
+ mpfr_set_inf (y, 1);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+ mpfr_set_inf (x, 1);
+ mpfr_set_inf (y, -1);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_inf (x, -1);
+ mpfr_set_inf (y, -1);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+ mpfr_set_inf (x, 1);
+ mpfr_set_ui (y, 0, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_ui (x, 1, MPFR_RNDN);
+ mpfr_set_ui (y, 0, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+ MPFR_ASSERTN(mpfr_eq (y, x, 1) == 0);
+
+ mpfr_set_ui (x, 0, MPFR_RNDN);
+ mpfr_set_ui (y, 0, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+ mpfr_neg (y, y, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+ mpfr_neg (x, x, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+
+ mpfr_set_ui (x, 1, MPFR_RNDN);
+ mpfr_neg (y, x, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_prec (x, 2 * mp_bits_per_limb);
+ mpfr_set_prec (y, mp_bits_per_limb);
+ mpfr_set_ui (x, 1, MPFR_RNDN);
+ mpfr_set_ui (y, 1, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1));
+
+ mpfr_nextabove (x);
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb));
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb) == 0);
+ MPFR_ASSERTN(mpfr_eq (x, y, 2 * mp_bits_per_limb + 1) == 0);
+ MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb));
+ MPFR_ASSERTN(mpfr_eq (y, x, mp_bits_per_limb + 1));
+ MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb - 1));
+ MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb) == 0);
+ MPFR_ASSERTN(mpfr_eq (y, x, 2 * mp_bits_per_limb + 1) == 0);
+
+ mpfr_set_ui (x, 1, MPFR_RNDN);
+ mpfr_set_ui (y, 2, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1) == 0);
+
+ mpfr_set_prec (x, 2 * mp_bits_per_limb);
+ mpfr_set_prec (y, 2 * mp_bits_per_limb);
+ mpfr_set_ui (x, 2, MPFR_RNDN);
+ mpfr_set_ui (y, 3, MPFR_RNDN);
+ MPFR_ASSERTN(mpfr_eq (x, y, 1));
+ MPFR_ASSERTN(mpfr_eq (x, y, 2) == 0);
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb) == 0);
+ MPFR_ASSERTN(mpfr_eq (x, y, mp_bits_per_limb + 1) == 0);
+
+ mpfr_clear (x);
+ mpfr_clear (y);
+ mpfr_clear (z);
+}
+
+int
+main (void)
+{
+ int j;
+ mpfr_t x;
+
+ tests_start_mpfr ();
+
+ special ();
+
+ mpfr_init2 (x, 500);
+
+ for (j = 0; j < 500; j++)
+ {
+ mpfr_urandomb (x, RANDS);
+ teq (x);
+ }
+
+ mpfr_clear (x);
+
+ tests_end_mpfr ();
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-14 05:01:23 +0000