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Annotation of OpenXM_contrib/gmp/tests/t-count_zeros.c, Revision 1.1.1.1

1.1       ohara       1: /* Test count_leading_zeros and count_trailing_zeros.
                      2:
                      3: Copyright 2001 Free Software Foundation, Inc.
                      4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include <stdio.h>
                     23: #include <stdlib.h>
                     24: #include "gmp.h"
                     25: #include "gmp-impl.h"
                     26: #include "longlong.h"
                     27: #include "tests.h"
                     28:
                     29: void
                     30: check_clz (int want, mp_limb_t n)
                     31: {
                     32:   int  got;
                     33:   count_leading_zeros (got, n);
                     34:   if (got != want)
                     35:     {
                     36:       printf ("count_leading_zeros wrong\n");
                     37:       printf    ("  n    %lX\n", n);
                     38:       printf    ("  want %d\n", want);
                     39:       printf    ("  got  %d\n", got);
                     40:       abort ();
                     41:     }
                     42: }
                     43:
                     44: void
                     45: check_ctz (int want, mp_limb_t n)
                     46: {
                     47:   int  got;
                     48:   count_trailing_zeros (got, n);
                     49:   if (got != want)
                     50:     {
                     51:       printf ("count_trailing_zeros wrong\n");
                     52:       mpn_trace ("  n    ", &n, (mp_size_t) 1);
                     53:       printf    ("  want %d\n", want);
                     54:       printf    ("  got  %d\n", got);
                     55:       abort ();
                     56:     }
                     57: }
                     58:
                     59: void
                     60: check_various (void)
                     61: {
                     62:   mp_limb_t  n;
                     63:   int        i;
                     64:
                     65: #ifdef COUNT_LEADING_ZEROS_0
                     66:   check_clz (COUNT_LEADING_ZEROS_0, CNST_LIMB(0));
                     67: #endif
                     68:
                     69:   for (n=1, i=0; i < BITS_PER_MP_LIMB; n<<=1, i++)
                     70:     {
                     71:       check_clz (i, CNST_LIMB(1) << (BITS_PER_MP_LIMB-1-i));
                     72:       check_ctz (i, CNST_LIMB(1) << i);
                     73:
                     74:       check_ctz (i, MP_LIMB_T_MAX << i);
                     75:       check_clz (i, MP_LIMB_T_MAX >> i);
                     76:     }
                     77: }
                     78:
                     79:
                     80: int
                     81: main (int argc, char *argv[])
                     82: {
                     83:   tests_start ();
                     84:   mp_trace_base = 16;
                     85:
                     86:   check_various ();
                     87:
                     88:   tests_end ();
                     89:   exit (0);
                     90: }