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1.1 takayama 1: /* Test mpf_mul, mpf_div, mpf_ui_div, and mpf_div_ui.
2:
3: Copyright (C) 1996 Free Software Foundation, Inc.
4:
5: This file is part of the GNU MP Library.
6:
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.
11:
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.
16:
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. */
21:
22: #include <stdio.h>
23: #include "gmp.h"
24: #include "gmp-impl.h"
25: #include "urandom.h"
26:
27: #ifndef SIZE
28: #define SIZE 16
29: #endif
30:
31: main (argc, argv)
32: int argc;
33: char **argv;
34: {
35: mp_size_t size;
36: mp_exp_t exp;
37: int reps = 100000;
38: int i;
39: mpf_t u, v, w, x;
40: mp_size_t bprec = 100;
41: mpf_t rerr, limit_rerr;
42: mp_limb_t ulimb, vlimb;
43: int single_flag;
44:
45: if (argc > 1)
46: {
47: reps = strtol (argv[1], 0, 0);
48: if (argc > 2)
49: bprec = strtol (argv[2], 0, 0);
50: }
51:
52: mpf_set_default_prec (bprec);
53:
54: mpf_init (rerr);
55: mpf_init (limit_rerr);
56:
57: mpf_init (u);
58: mpf_init (v);
59: mpf_init (w);
60: mpf_init (x);
61:
62: for (i = 0; i < reps; i++)
63: {
64: mp_size_t res_prec;
65:
66: res_prec = urandom () % (bprec + 100);
67: mpf_set_prec (w, res_prec);
68: mpf_set_prec (x, res_prec);
69:
70: mpf_set_ui (limit_rerr, 1);
71: mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
72:
73: single_flag = 0;
74:
75: if ((urandom () & 1) != 0)
76: {
77: size = urandom () % (2 * SIZE) - SIZE;
78: exp = urandom () % SIZE;
79: mpf_random2 (u, size, exp);
80: }
81: else
82: {
83: ulimb = urandom ();
84: mpf_set_ui (u, ulimb);
85: single_flag = 1;
86: }
87:
88: if ((urandom () & 1) != 0)
89: {
90: size = urandom () % (2 * SIZE) - SIZE;
91: exp = urandom () % SIZE;
92: mpf_random2 (v, size, exp);
93: }
94: else
95: {
96: vlimb = urandom ();
97: mpf_set_ui (v, vlimb);
98: single_flag = 2;
99: }
100:
101: if (mpf_sgn (v) == 0)
102: continue;
103:
104: mpf_div (w, u, v);
105: mpf_mul (x, w, v);
106: mpf_reldiff (rerr, u, x);
107: if (mpf_cmp (rerr, limit_rerr) > 0)
108: {
109: printf ("ERROR in mpf_mul or mpf_div after %d tests\n", i);
110: printf (" u = "); mpf_dump (u);
111: printf (" v = "); mpf_dump (v);
112: printf (" x = "); mpf_dump (x);
113: printf (" w = "); mpf_dump (w);
114: abort ();
115: }
116:
117: if (single_flag == 2)
118: {
119: mpf_div_ui (x, u, vlimb);
120: mpf_reldiff (rerr, w, x);
121: if (mpf_cmp (rerr, limit_rerr) > 0)
122: {
123: printf ("ERROR in mpf_div or mpf_div_ui after %d tests\n", i);
124: printf (" u = "); mpf_dump (u);
125: printf (" v = "); mpf_dump (v);
126: printf (" x = "); mpf_dump (x);
127: printf (" w = "); mpf_dump (w);
128: abort ();
129: }
130: }
131:
132: if (single_flag == 1)
133: {
134: mpf_ui_div (x, ulimb, v);
135: mpf_reldiff (rerr, w, x);
136: if (mpf_cmp (rerr, limit_rerr) > 0)
137: {
138: printf ("ERROR in mpf_div or mpf_ui_div after %d tests\n", i);
139: printf (" u = "); mpf_dump (u);
140: printf (" v = "); mpf_dump (v);
141: printf (" x = "); mpf_dump (x);
142: printf (" w = "); mpf_dump (w);
143: abort ();
144: }
145: }
146: }
147:
148: exit (0);
149: }
150:
151: oo (x)
152: mpf_t x;
153: {
154: mp_size_t i;
155: printf (" exp = %ld\n", x->_mp_exp);
156: printf ("size = %d\n", x->_mp_size);
157: for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
158: printf ("%08lX ", x->_mp_d[i]);
159: printf ("\n");
160: mpf_dump (x);
161: }