pqc/external/flint-2.4.3/test/t-count_trailing_zeros.c
2014-05-24 23:16:06 +02:00

65 lines
1.8 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("count_trailing_zeros....");
fflush(stdout);
for (i = 0; i < 1000000; i++)
{
mp_limb_t n;
unsigned int count = 0;
n = n_randtest(state);
if (n != 0)
count_trailing_zeros(count, n);
result = ((n == UWORD(0)) || (((n >> count) & UWORD(1)) && (l_shift(n, FLINT_BITS-count) == UWORD(0))));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("n = %wu, count = %u\n", n, count);
abort();
}
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}