gmp-4.3.1/tests/t-popc.c

/* Test popc_limb.

Copyright 2002 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 3 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.  If not, see http://www.gnu.org/licenses/.  */

#include <stdio.h>
#include <stdlib.h>

#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"


int
main (void)
{
  mp_limb_t  src, want, got;
  int        i;

  tests_start ();
  mp_trace_base = -16;

  for (i = 0; i < GMP_LIMB_BITS; i++)
    {
      src = CNST_LIMB(1) << i;
      want = 1;

      popc_limb (got, src);
      if (got != want)
        {
        error:
          printf ("popc_limb wrong result\n");
          mpn_trace ("  src ", &src,  (mp_size_t) 1);
          mpn_trace ("  want", &want, (mp_size_t) 1);
          mpn_trace ("  got ", &got,  (mp_size_t) 1);
          abort ();
        }
    }

  for (i = 0; i < 100; i++)
    {
      mpn_random2 (&src, (mp_size_t) 1);
      want = ref_popc_limb (src);

      popc_limb (got, src);
      if (got != want)
        goto error;
    }

  tests_end ();
  exit (0);
}