xref: /src/external/lgpl3/gmp/dist/tests/mpn/t-mp_bases.c

/* Check mp_bases values.

Copyright 2002 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"


int
main (int argc, char *argv[])
{
  mp_limb_t  want_bb, want_bb_inv;
  int        base, want_chars_per_limb;

  want_chars_per_limb = refmpn_chars_per_limb (10);
  if (MP_BASES_CHARS_PER_LIMB_10 != want_chars_per_limb)
    {
      printf ("MP_BASES_CHARS_PER_LIMB_10 wrong\n");
      abort ();
    }

  want_bb = refmpn_big_base (10);
  if (MP_BASES_BIG_BASE_10 != want_bb)
    {
      printf ("MP_BASES_BIG_BASE_10 wrong\n");
      abort ();
    }

  want_bb_inv = refmpn_invert_limb
    (want_bb << refmpn_count_leading_zeros (want_bb));
  if (MP_BASES_BIG_BASE_INVERTED_10 != want_bb_inv)
    {
      printf ("MP_BASES_BIG_BASE_INVERTED_10 wrong\n");
      abort ();
    }

  if (MP_BASES_NORMALIZATION_STEPS_10
      != refmpn_count_leading_zeros (MP_BASES_BIG_BASE_10))
    {
      printf ("MP_BASES_NORMALIZATION_STEPS_10 wrong\n");
      abort ();
    }

  for (base = 2; base < numberof (mp_bases); base++)
    {
      want_chars_per_limb = refmpn_chars_per_limb (base);
      if (mp_bases[base].chars_per_limb != want_chars_per_limb)
        {
          printf ("mp_bases[%d].chars_per_limb wrong\n", base);
          printf ("  got  %d\n", mp_bases[base].chars_per_limb);
          printf ("  want %d\n", want_chars_per_limb);
          abort ();
        }

      if (POW2_P (base))
        {
          want_bb = refmpn_count_trailing_zeros ((mp_limb_t) base);
          if (mp_bases[base].big_base != want_bb)
            {
              printf ("mp_bases[%d].big_base (log2 of base) wrong\n", base);
              abort ();
            }
        }
      else
        {
          want_bb = refmpn_big_base (base);
          if (mp_bases[base].big_base != want_bb)
            {
              printf ("mp_bases[%d].big_base wrong\n", base);
              abort ();
            }

#if USE_PREINV_DIVREM_1
          want_bb_inv = refmpn_invert_limb
            (want_bb << refmpn_count_leading_zeros (want_bb));
          if (mp_bases[base].big_base_inverted != want_bb_inv)
            {
              printf ("mp_bases[%d].big_base_inverted wrong\n", base);
              abort ();
            }
#endif
        }
    }

  exit (0);
}