90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/* Test count_leading_zeros and count_trailing_zeros.
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Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp.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 < BITS_PER_MP_LIMB; i++)
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{
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check_clz (i, CNST_LIMB(1) << (BITS_PER_MP_LIMB-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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