75 lines
2.1 KiB
C
75 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("mulmod_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 a, b, d, r1, r2, p1, p2, dinv;
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double dpre;
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mp_limb_t bits = n_randint(state, FLINT_D_BITS) + 1;
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d = n_randtest_bits(state, bits);
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a = n_randtest(state) % d;
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b = n_randtest(state) % d;
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dpre = n_precompute_inverse(d);
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r1 = n_mulmod_precomp(a, b, d, dpre);
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umul_ppmm(p1, p2, a, b);
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dinv = n_preinvert_limb(d);
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r2 = n_ll_mod_preinv(p1, p2, d, dinv);
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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("a = %wu, b = %wu, d = %wu, dinv = %f\n", a, b, 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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