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87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/* Test count_leading_zeros and count_trailing_zeros.
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Copyright 2001-2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp-impl.h"
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#include "longlong.h"
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#include "tests.h"
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void
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check_clz (int want, mp_limb_t n)
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{
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int got;
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count_leading_zeros (got, n);
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if (got != want)
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{
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printf ("count_leading_zeros wrong\n");
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mp_limb_trace (" n ", n);
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printf (" want %d\n", want);
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printf (" got %d\n", got);
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abort ();
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}
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}
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void
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check_ctz (int want, mp_limb_t n)
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{
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int got;
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count_trailing_zeros (got, n);
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if (got != want)
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{
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printf ("count_trailing_zeros wrong\n");
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mpn_trace (" n ", &n, (mp_size_t) 1);
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printf (" want %d\n", want);
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printf (" got %d\n", got);
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abort ();
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}
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}
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void
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check_various (void)
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{
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int i;
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#ifdef COUNT_LEADING_ZEROS_0
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check_clz (COUNT_LEADING_ZEROS_0, CNST_LIMB(0));
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#endif
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for (i=0; i < GMP_LIMB_BITS; i++)
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{
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check_clz (i, CNST_LIMB(1) << (GMP_LIMB_BITS-1-i));
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check_ctz (i, CNST_LIMB(1) << i);
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check_ctz (i, MP_LIMB_T_MAX << i);
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check_clz (i, MP_LIMB_T_MAX >> i);
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}
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}
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int
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main (int argc, char *argv[])
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{
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tests_start ();
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mp_trace_base = 16;
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check_various ();
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tests_end ();
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exit (0);
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}
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