91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
|
/*=============================================================================
|
||
|
|
|
||
|
|
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) 2009 William Hart
|
||
|
|
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <gmp.h>
|
||
|
|
#include "flint.h"
|
||
|
|
#include "ulong_extras.h"
|
||
|
|
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
int i, result;
|
||
|
|
FLINT_TEST_INIT(state);
|
||
|
|
|
||
|
|
flint_printf("powmod....");
|
||
|
|
fflush(stdout);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
for (i = 0; i < 10000 * flint_test_multiplier(); i++)
|
||
|
|
{
|
||
|
|
mp_limb_t bits, a, d, r1, r2;
|
||
|
|
mpz_t a_m, d_m, r2_m;
|
||
|
|
mp_limb_signed_t exp;
|
||
|
|
|
||
|
|
mpz_init(a_m);
|
||
|
|
mpz_init(d_m);
|
||
|
|
mpz_init(r2_m);
|
||
|
|
|
||
|
|
bits = n_randint(state, FLINT_D_BITS) + 1;
|
||
|
|
d = n_randtest_bits(state, bits);
|
||
|
|
do
|
||
|
|
{
|
||
|
|
a = n_randtest(state) % d;
|
||
|
|
} while (n_gcd(d, a) != UWORD(1));
|
||
|
|
exp = n_randtest(state);
|
||
|
|
|
||
|
|
r1 = n_powmod(a, exp, d);
|
||
|
|
|
||
|
|
flint_mpz_set_ui(a_m, a);
|
||
|
|
flint_mpz_set_ui(d_m, d);
|
||
|
|
if (exp < WORD(0))
|
||
|
|
{
|
||
|
|
flint_mpz_powm_ui(r2_m, a_m, -exp, d_m);
|
||
|
|
mpz_invert(r2_m, r2_m, d_m);
|
||
|
|
} else
|
||
|
|
flint_mpz_powm_ui(r2_m, a_m, exp, d_m);
|
||
|
|
r2 = flint_mpz_get_ui(r2_m);
|
||
|
|
|
||
|
|
result = (r1 == r2);
|
||
|
|
if (!result)
|
||
|
|
{
|
||
|
|
flint_printf("FAIL:\n");
|
||
|
|
flint_printf("a = %wu, exp = %wd, d = %wu\n", a, exp, d);
|
||
|
|
flint_printf("r1 = %wu, r2 = %wu\n", r1, r2);
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
|
||
|
|
mpz_clear(a_m);
|
||
|
|
mpz_clear(d_m);
|
||
|
|
mpz_clear(r2_m);
|
||
|
|
}
|
||
|
|
|
||
|
|
FLINT_TEST_CLEANUP(state);
|
||
|
|
|
||
|
|
flint_printf("PASS\n");
|
||
|
|
return 0;
|
||
|
|
}
|