84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/* Test binvert_limb.
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Copyright 2000-2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gmp-impl.h"
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#include "longlong.h"
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#include "tests.h"
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void
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one (mp_limb_t n)
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{
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mp_limb_t inv, prod;
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binvert_limb (inv, n);
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prod = (inv * n) & GMP_NUMB_MASK;
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if (prod != 1)
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{
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printf ("binvert_limb wrong\n");
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mp_limb_trace (" n ", n);
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mp_limb_trace (" got ", inv);
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mp_limb_trace (" product ", prod);
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abort ();
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}
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}
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void
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some (void)
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{
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int i;
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for (i = 0; i < 10000; i++)
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one (refmpn_random_limb () | 1);
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}
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void
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all (void)
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{
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mp_limb_t n;
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n = 1;
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do {
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one (n);
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n += 2;
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} while (n != 1);
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}
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int
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main (int argc, char *argv[])
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{
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tests_start ();
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if (argc >= 2 && strcmp (argv[1], "-a") == 0)
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{
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/* it's feasible to run all values on a 32-bit limb, but not a 64-bit */
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all ();
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}
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else
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{
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some ();
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}
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tests_end ();
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exit (0);
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}
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