102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
/* Test mpf_div, mpf_div_2exp, mpf_mul_2exp.
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Copyright (C) 1996 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 Library General Public License as published by
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the Free Software Foundation; either version 2 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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library 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., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "urandom.h"
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#ifndef SIZE
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#define SIZE 16
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#endif
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main (argc, argv)
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int argc;
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char **argv;
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{
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int reps = 500000;
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int i;
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mpf_t u, v, w1, w2;
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mp_size_t bprec = 100;
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mpf_t rerr, limit_rerr;
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if (argc > 1)
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{
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reps = strtol (argv[1], 0, 0);
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if (argc > 2)
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bprec = strtol (argv[2], 0, 0);
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}
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mpf_set_default_prec (bprec);
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mpf_init (rerr);
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mpf_init (limit_rerr);
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mpf_init (u);
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mpf_init (v);
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mpf_init (w1);
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mpf_init (w2);
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for (i = 0; i < reps; i++)
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{
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mp_size_t res_prec;
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unsigned long int pow2;
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res_prec = urandom () % (bprec + 100);
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mpf_set_prec (w1, res_prec);
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mpf_set_prec (w2, res_prec);
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mpf_set_ui (limit_rerr, 1);
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mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
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pow2 = urandom () % 0x10000;
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mpf_set_ui (v, 1);
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mpf_mul_2exp (v, v, pow2);
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mpf_div_2exp (w1, u, pow2);
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mpf_div (w2, u, v);
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mpf_reldiff (rerr, w1, w2);
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if (mpf_cmp (rerr, limit_rerr) > 0)
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{
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printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i);
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printf (" u = "); mpf_dump (u);
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printf (" v = "); mpf_dump (v);
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printf (" w1 = "); mpf_dump (w1);
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printf (" w2 = "); mpf_dump (w2);
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abort ();
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}
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}
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exit (0);
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}
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oo (x)
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mpf_t x;
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{
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mp_size_t i;
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printf (" exp = %ld\n", x->_mp_exp);
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printf ("size = %d\n", x->_mp_size);
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for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
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printf ("%08lX ", x->_mp_d[i]);
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printf ("\n");
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mpf_dump (x);
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}
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