| /* 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 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 "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); |
| } |