90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* Test count_leading_zeros and count_trailing_zeros.
|
|
|
|
Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library 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 Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "gmp.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 < BITS_PER_MP_LIMB; i++)
|
|
{
|
|
check_clz (i, CNST_LIMB(1) << (BITS_PER_MP_LIMB-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);
|
|
}
|