pqc/external/flint-2.4.3/fmpz_mod_poly/test/t-mulmod_preinv.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2012 Lina Kulakova
Copyright (C) 2011, 2010 Sebastian Pancratz
Copyright (C) 2009 William Hart
Copyright (C) 2013 Martin Lee
******************************************************************************/
#undef ulong
#define ulong ulongxx/* interferes with system includes */
#include <stdlib.h>
#include <stdio.h>
#undef ulong
#include <gmp.h>
#define ulong mp_limb_t
#include "flint.h"
#include "fmpz.h"
#include "fmpz_mod_poly.h"
#include "ulong_extras.h"
int
main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("mulmod_preinv....");
fflush(stdout);
/* Check aliasing of res and a */
for (i = 0; i < 2000; i++)
{
fmpz_t p;
fmpz_mod_poly_t a, b, res, f, finv;
fmpz_init(p);
fmpz_set_ui(p, n_randtest_prime(state, 0));
fmpz_mod_poly_init(a, p);
fmpz_mod_poly_init(b, p);
fmpz_mod_poly_init(f, p);
fmpz_mod_poly_init(finv, p);
fmpz_mod_poly_init(res, p);
fmpz_mod_poly_randtest(a, state, n_randint(state, 50));
fmpz_mod_poly_randtest(b, state, n_randint(state, 50));
fmpz_mod_poly_randtest_not_zero(f, state, n_randint(state, 50) + 1);
if (a->length >= f->length)
fmpz_mod_poly_rem (a, a, f);
if (b->length >= f->length)
fmpz_mod_poly_rem (b, b, f);
fmpz_mod_poly_reverse (finv, f, f->length);
fmpz_mod_poly_inv_series_newton (finv, finv, f->length);
fmpz_mod_poly_mulmod_preinv(res, a, b, f, finv);
fmpz_mod_poly_mulmod_preinv(a, a, b, f, finv);
result = (fmpz_mod_poly_equal(res, a));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a:\n"); fmpz_mod_poly_print(a), flint_printf("\n\n");
flint_printf("b:\n"); fmpz_mod_poly_print(b), flint_printf("\n\n");
flint_printf("f:\n"); fmpz_mod_poly_print(f), flint_printf("\n\n");
flint_printf("res:\n"); fmpz_mod_poly_print(res), flint_printf("\n\n");
abort();
}
fmpz_mod_poly_clear(a);
fmpz_mod_poly_clear(b);
fmpz_mod_poly_clear(f);
fmpz_mod_poly_clear(finv);
fmpz_mod_poly_clear(res);
fmpz_clear(p);
}
/* Check aliasing of res and b */
for (i = 0; i < 2000; i++)
{
fmpz_t p;
fmpz_mod_poly_t a, b, f, finv, res;
fmpz_init(p);
fmpz_set_ui(p, n_randtest_prime(state, 0));
fmpz_mod_poly_init(a, p);
fmpz_mod_poly_init(b, p);
fmpz_mod_poly_init(f, p);
fmpz_mod_poly_init(finv, p);
fmpz_mod_poly_init(res, p);
fmpz_mod_poly_randtest(a, state, n_randint(state, 50));
fmpz_mod_poly_randtest(b, state, n_randint(state, 50));
fmpz_mod_poly_randtest_not_zero(f, state, n_randint(state, 50) + 1);
if (a->length >= f->length)
fmpz_mod_poly_rem (a, a, f);
if (b->length >= f->length)
fmpz_mod_poly_rem (b, b, f);
fmpz_mod_poly_reverse (finv, f, f->length);
fmpz_mod_poly_inv_series_newton (finv, finv, f->length);
fmpz_mod_poly_mulmod_preinv(res, a, b, f, finv);
fmpz_mod_poly_mulmod_preinv(b, a, b, f, finv);
result = (fmpz_mod_poly_equal(res, b));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a:\n"); fmpz_mod_poly_print(a), flint_printf("\n\n");
flint_printf("b:\n"); fmpz_mod_poly_print(b), flint_printf("\n\n");
flint_printf("f:\n"); fmpz_mod_poly_print(f), flint_printf("\n\n");
flint_printf("res:\n"); fmpz_mod_poly_print(res), flint_printf("\n\n");
abort();
}
fmpz_mod_poly_clear(a);
fmpz_mod_poly_clear(b);
fmpz_mod_poly_clear(f);
fmpz_mod_poly_clear(finv);
fmpz_mod_poly_clear(res);
fmpz_clear(p);
}
/* Check aliasing of res and f */
for (i = 0; i < 2000; i++)
{
fmpz_t p;
fmpz_mod_poly_t a, b, f, finv, res;
fmpz_init(p);
fmpz_set_ui(p, n_randtest_prime(state, 0));
fmpz_mod_poly_init(a, p);
fmpz_mod_poly_init(b, p);
fmpz_mod_poly_init(f, p);
fmpz_mod_poly_init(finv, p);
fmpz_mod_poly_init(res, p);
fmpz_mod_poly_randtest(a, state, n_randint(state, 50));
fmpz_mod_poly_randtest(b, state, n_randint(state, 50));
fmpz_mod_poly_randtest_not_zero(f, state, n_randint(state, 50) + 1);
if (a->length >= f->length)
fmpz_mod_poly_rem (a, a, f);
if (b->length >= f->length)
fmpz_mod_poly_rem (b, b, f);
fmpz_mod_poly_reverse (finv, f, f->length);
fmpz_mod_poly_inv_series_newton (finv, finv, f->length);
fmpz_mod_poly_mulmod_preinv(res, a, b, f, finv);
fmpz_mod_poly_mulmod_preinv(f, a, b, f, finv);
result = (fmpz_mod_poly_equal(res, f));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a:\n"); fmpz_mod_poly_print(a), flint_printf("\n\n");
flint_printf("b:\n"); fmpz_mod_poly_print(b), flint_printf("\n\n");
flint_printf("f:\n"); fmpz_mod_poly_print(f), flint_printf("\n\n");
flint_printf("res:\n"); fmpz_mod_poly_print(res), flint_printf("\n\n");
abort();
}
fmpz_mod_poly_clear(a);
fmpz_mod_poly_clear(b);
fmpz_mod_poly_clear(f);
fmpz_mod_poly_clear(finv);
fmpz_mod_poly_clear(res);
fmpz_clear(p);
}
/* Check aliasing of res and finv */
for (i = 0; i < 2000; i++)
{
fmpz_t p;
fmpz_mod_poly_t a, b, f, finv, res;
fmpz_init(p);
fmpz_set_ui(p, n_randtest_prime(state, 0));
fmpz_mod_poly_init(a, p);
fmpz_mod_poly_init(b, p);
fmpz_mod_poly_init(f, p);
fmpz_mod_poly_init(finv, p);
fmpz_mod_poly_init(res, p);
fmpz_mod_poly_randtest(a, state, n_randint(state, 50));
fmpz_mod_poly_randtest(b, state, n_randint(state, 50));
fmpz_mod_poly_randtest_not_zero(f, state, n_randint(state, 50) + 1);
if (a->length >= f->length)
fmpz_mod_poly_rem (a, a, f);
if (b->length >= f->length)
fmpz_mod_poly_rem (b, b, f);
fmpz_mod_poly_reverse (finv, f, f->length);
fmpz_mod_poly_inv_series_newton (finv, finv, f->length);
fmpz_mod_poly_mulmod_preinv(res, a, b, f, finv);
fmpz_mod_poly_mulmod_preinv(finv, a, b, f, finv);
result = (fmpz_mod_poly_equal(res, finv));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a:\n"); fmpz_mod_poly_print(a), flint_printf("\n\n");
flint_printf("b:\n"); fmpz_mod_poly_print(b), flint_printf("\n\n");
flint_printf("f:\n"); fmpz_mod_poly_print(f), flint_printf("\n\n");
flint_printf("finv:\n"); fmpz_mod_poly_print(finv), flint_printf("\n\n");
flint_printf("res:\n"); fmpz_mod_poly_print(res), flint_printf("\n\n");
abort();
}
fmpz_mod_poly_clear(a);
fmpz_mod_poly_clear(b);
fmpz_mod_poly_clear(f);
fmpz_mod_poly_clear(finv);
fmpz_mod_poly_clear(res);
fmpz_clear(p);
}
/* No aliasing */
for (i = 0; i < 1000; i++)
{
fmpz_t p;
fmpz_mod_poly_t a, b, res1, res2, f, finv;
fmpz_init(p);
fmpz_set_ui(p, n_randtest_prime(state, 0));
fmpz_mod_poly_init(a, p);
fmpz_mod_poly_init(b, p);
fmpz_mod_poly_init(f, p);
fmpz_mod_poly_init(finv, p);
fmpz_mod_poly_randtest(a, state, n_randint(state, 50));
fmpz_mod_poly_randtest(b, state, n_randint(state, 50));
fmpz_mod_poly_randtest_not_zero(f, state, n_randint(state, 50) + 1);
if (a->length >= f->length)
fmpz_mod_poly_rem (a, a, f);
if (b->length >= f->length)
fmpz_mod_poly_rem (b, b, f);
fmpz_mod_poly_reverse (finv, f, f->length);
fmpz_mod_poly_inv_series_newton (finv, finv, f->length);
fmpz_mod_poly_init(res1, p);
fmpz_mod_poly_init(res2, p);
fmpz_mod_poly_mulmod(res1, a, b, f);
fmpz_mod_poly_mulmod_preinv(res2, a, b, f, finv);
result = (fmpz_mod_poly_equal(res1, res2));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("a:\n"); fmpz_mod_poly_print(a), flint_printf("\n\n");
flint_printf("b:\n"); fmpz_mod_poly_print(b), flint_printf("\n\n");
flint_printf("f:\n"); fmpz_mod_poly_print(f), flint_printf("\n\n");
flint_printf("res1:\n"); fmpz_mod_poly_print(res1), flint_printf("\n\n");
flint_printf("res2:\n"); fmpz_mod_poly_print(res2), flint_printf("\n\n");
abort();
}
fmpz_mod_poly_clear(a);
fmpz_mod_poly_clear(b);
fmpz_mod_poly_clear(f);
fmpz_mod_poly_clear(finv);
fmpz_mod_poly_clear(res1);
fmpz_mod_poly_clear(res2);
fmpz_clear(p);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}