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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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Copyright 2012, 2013 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 <limits.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "testutils.h"
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#define MAXBITS 400
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#define COUNT 10000
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/* Called when s is supposed to be floor(root(u,z)), and r = u - s^z */
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static int
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rootrem_valid_p (const mpz_t u, const mpz_t s, const mpz_t r, unsigned long z)
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{
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mpz_t t;
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mpz_init (t);
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if (mpz_fits_ulong_p (s))
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mpz_ui_pow_ui (t, mpz_get_ui (s), z);
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else
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mpz_pow_ui (t, s, z);
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mpz_sub (t, u, t);
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if ((mpz_sgn (t) != mpz_sgn(u) && mpz_sgn (t) != 0) || mpz_cmp (t, r) != 0)
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{
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mpz_clear (t);
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return 0;
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}
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if (mpz_sgn (s) > 0)
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mpz_add_ui (t, s, 1);
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else
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mpz_sub_ui (t, s, 1);
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mpz_pow_ui (t, t, z);
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if (mpz_cmpabs (t, u) <= 0)
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{
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mpz_clear (t);
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return 0;
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}
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mpz_clear (t);
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return 1;
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}
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void
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testmain (int argc, char **argv)
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{
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unsigned i;
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unsigned long e;
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mpz_t u, s, r, bs;
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mpz_init (u);
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mpz_init (s);
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mpz_init (r);
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mpz_init (bs);
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for (i = 0; i < COUNT; i++)
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{
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mini_rrandomb (u, MAXBITS);
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mini_rrandomb (bs, 12);
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e = mpz_getlimbn (bs, 0) % mpz_sizeinbase (u, 2) + 1;
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if ((e & 1) && (mpz_getlimbn (bs, 0) & (1L<<10)))
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mpz_neg (u, u);
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mpz_rootrem (s, r, u, e);
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if (!rootrem_valid_p (u, s, r, e))
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{
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fprintf (stderr, "mpz_rootrem(%lu-th) failed:\n", e);
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dump ("u", u);
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dump ("root", s);
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dump ("rem", r);
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abort ();
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}
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}
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mpz_clear (bs);
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mpz_clear (u);
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mpz_clear (s);
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mpz_clear (r);
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}
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