1 /* Test mpf_div, mpf_div_2exp, mpf_mul_2exp.
3 Copyright (C) 1996 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Library General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or (at your
10 option) any later version.
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 Library General Public
15 License for more details.
17 You should have received a copy of the GNU Library 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. */
38 mp_size_t bprec = 100;
39 mpf_t rerr, limit_rerr;
43 reps = strtol (argv[1], 0, 0);
45 bprec = strtol (argv[2], 0, 0);
48 mpf_set_default_prec (bprec);
51 mpf_init (limit_rerr);
58 for (i = 0; i < reps; i++)
61 unsigned long int pow2;
63 res_prec = urandom () % (bprec + 100);
64 mpf_set_prec (w1, res_prec);
65 mpf_set_prec (w2, res_prec);
67 mpf_set_ui (limit_rerr, 1);
68 mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
70 pow2 = urandom () % 0x10000;
72 mpf_mul_2exp (v, v, pow2);
74 mpf_div_2exp (w1, u, pow2);
76 mpf_reldiff (rerr, w1, w2);
77 if (mpf_cmp (rerr, limit_rerr) > 0)
79 printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i);
80 printf (" u = "); mpf_dump (u);
81 printf (" v = "); mpf_dump (v);
82 printf (" w1 = "); mpf_dump (w1);
83 printf (" w2 = "); mpf_dump (w2);
95 printf (" exp = %ld\n", x->_mp_exp);
96 printf ("size = %d\n", x->_mp_size);
97 for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
98 printf ("%08lX ", x->_mp_d[i]);