94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Sebastian Pancratz
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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int main(void)
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{
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int i, result;
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FLINT_TEST_INIT(state);
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flint_printf("sqrtmod....");
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fflush(stdout);
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for (i = 0; i < 1000 * flint_test_multiplier(); i++) /* Test random integers */
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{
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mp_limb_t a, b, p, pinv;
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p = n_randtest_prime(state, 0);
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a = n_randtest(state) % p;
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b = n_sqrtmod(a, p);
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pinv = n_preinvert_limb(p);
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result = (b == 0 || n_mulmod2_preinv(b, b, p, pinv) == a);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("p = %wu\n", p);
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flint_printf("a = %wu\n", a);
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flint_printf("b = %wu\n", b);
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abort();
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}
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}
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for (i = 0; i < 1000 * flint_test_multiplier(); i++) /* Test random squares */
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{
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mp_limb_t a, b, p, pinv;
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p = n_randtest_prime(state, 0);
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do
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b = n_randtest(state) % p;
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while (b == 0);
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pinv = n_preinvert_limb(p);
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a = n_mulmod2_preinv(b, b, p, pinv);
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b = n_sqrtmod(a, p);
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result = (n_mulmod2_preinv(b, b, p, pinv) == a);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("p = %wu\n", p);
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flint_printf("a = %wu\n", a);
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flint_printf("b = %wu\n", b);
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abort();
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}
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}
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return 0;
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}
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