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/* Test count_leading_zeros and count_trailing_zeros.
Copyright 2001-2003 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite 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 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite 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
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "longlong.h"
#include "tests.h"
void
check_clz (int want, mp_limb_t n)
{
int got;
count_leading_zeros (got, n);
if (got != want)
{
printf ("count_leading_zeros wrong\n");
mp_limb_trace (" n ", n);
printf (" want %d\n", want);
printf (" got %d\n", got);
abort ();
}
}
void
check_ctz (int want, mp_limb_t n)
{
int got;
count_trailing_zeros (got, n);
if (got != want)
{
printf ("count_trailing_zeros wrong\n");
mpn_trace (" n ", &n, (mp_size_t) 1);
printf (" want %d\n", want);
printf (" got %d\n", got);
abort ();
}
}
void
check_various (void)
{
int i;
#ifdef COUNT_LEADING_ZEROS_0
check_clz (COUNT_LEADING_ZEROS_0, CNST_LIMB(0));
#endif
for (i=0; i < GMP_LIMB_BITS; i++)
{
check_clz (i, CNST_LIMB(1) << (GMP_LIMB_BITS-1-i));
check_ctz (i, CNST_LIMB(1) << i);
check_ctz (i, MP_LIMB_T_MAX << i);
check_clz (i, MP_LIMB_T_MAX >> i);
}
}
int
main (int argc, char *argv[])
{
tests_start ();
mp_trace_base = 16;
check_various ();
tests_end ();
exit (0);
}
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