1/* Test popc_limb.
2
3Copyright 2002, 2012 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library test suite.
6
7The GNU MP Library test suite is free software; you can redistribute it
8and/or modify it under the terms of the GNU General Public License as
9published by the Free Software Foundation; either version 3 of the License,
10or (at your option) any later version.
11
12The GNU MP Library test suite is distributed in the hope that it will be
13useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
15Public License for more details.
16
17You should have received a copy of the GNU General Public License along with
18the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
19
20#include <stdio.h>
21#include <stdlib.h>
22
23#include "gmp-impl.h"
24#include "tests.h"
25
26
27int
28main (void)
29{
30  mp_limb_t  src, want, got;
31  int        i;
32
33  tests_start ();
34  mp_trace_base = -16;
35
36  for (i = 0; i < GMP_LIMB_BITS; i++)
37    {
38      src = CNST_LIMB(1) << i;
39      want = 1;
40
41      popc_limb (got, src);
42      if (got != want)
43        {
44        error:
45          printf ("popc_limb wrong result\n");
46          mpn_trace ("  src ", &src,  (mp_size_t) 1);
47          mpn_trace ("  want", &want, (mp_size_t) 1);
48          mpn_trace ("  got ", &got,  (mp_size_t) 1);
49          abort ();
50        }
51    }
52
53  src = 0;
54  want = 0;
55  for (i = 0; i < GMP_LIMB_BITS; i++)
56    {
57      src += CNST_LIMB(1) << i;
58      want += 1;
59
60      popc_limb (got, src);
61      if (got != want)
62        {
63	  goto error;
64        }
65    }
66
67  for (i = 0; i < 100; i++)
68    {
69      mpn_random2 (&src, (mp_size_t) 1);
70      want = ref_popc_limb (src);
71
72      popc_limb (got, src);
73      if (got != want)
74        goto error;
75    }
76
77  tests_end ();
78  exit (0);
79}
80