76 lines
2.1 KiB
C
76 lines
2.1 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) 2009 William Hart
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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("mod_precomp....");
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fflush(stdout);
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for (i = 0; i < 100000 * flint_test_multiplier(); i++)
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{
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mp_limb_t bits, d, n, r1, r2;
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double dpre;
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bits = n_randint(state, FLINT_D_BITS) + 1;
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d = n_randtest_bits(state, bits);
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if (bits <= (FLINT_BITS/2)) n = n_randtest(state) % (d*d);
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else n = n_randtest(state);
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/* must have n < 2^(FLINT_BITS - 1) */
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if (FLINT_BIT_COUNT(n) == FLINT_BITS)
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n >>= 1;
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dpre = n_precompute_inverse(d);
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r1 = n_mod_precomp(n, d, dpre);
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r2 = n%d;
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result = (r1 == r2);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("n = %wu, d = %wu, dinv = %g\n", n, d, dpre);
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flint_printf("r1 = %wu, r2 = %wu\n", r1, r2);
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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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