87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
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/* Test modlimb_invert.
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Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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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.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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modlimb_invert (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 ("modlimb_invert 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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