1 /*
2 Copyright (C) 2009, 2010 William Hart
3 Copyright (C) 2010 Sebastian Pancratz
4 Copyright (C) 2014 Abhinav Baid
5
6 This file is part of FLINT.
7
8 FLINT is free software: you can redistribute it and/or modify it under
9 the terms of the GNU Lesser General Public License (LGPL) as published
10 by the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version. See <http://www.gnu.org/licenses/>.
12 */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <gmp.h>
17 #include <math.h>
18 #include "flint.h"
19 #include "fmpz.h"
20 #include "fmpz_vec.h"
21 #include "d_vec.h"
22 #include "ulong_extras.h"
23
24 int
main(void)25 main(void)
26 {
27 int i;
28 FLINT_TEST_INIT(state);
29
30 flint_printf("get_d_vec_2exp....");
31 fflush(stdout);
32
33 for (i = 0; i < 1000 * flint_test_multiplier(); i++)
34 {
35 int result;
36 fmpz *a;
37 double *d1, *d2;
38 slong bits, j, len, l1, l2, l3;
39
40 len = n_randint(state, 100);
41
42 a = _fmpz_vec_init(len);
43 d1 = _d_vec_init(len);
44 d2 = _d_vec_init(len);
45
46 bits = 1 + n_randint(state, 200);
47
48 _fmpz_vec_randtest(a, state, len, bits);
49
50 l1 = _fmpz_vec_get_d_vec_2exp(d1, a, len / 2);
51 l2 = _fmpz_vec_get_d_vec_2exp(d1 + len / 2, a + len / 2,
52 (len + 1) / 2);
53 l3 = _fmpz_vec_get_d_vec_2exp(d2, a, len);
54
55 if (l1 < l2)
56 for (j = 0; j < len / 2; j++)
57 d1[j] = ldexp(d1[j], l1 - l2);
58
59 if (l2 < l1)
60 for (j = len / 2; j < len; j++)
61 d1[j] = ldexp(d1[j], l2 - l1);
62
63 result = (l3 == FLINT_MAX(l1, l2) && _d_vec_equal(d1, d2, len));
64 if (!result)
65 {
66 flint_printf("FAIL:\n");
67 _fmpz_vec_print(a, len), flint_printf("\n");
68 abort();
69 }
70
71 _fmpz_vec_clear(a, len);
72 _d_vec_clear(d1);
73 _d_vec_clear(d2);
74 }
75
76 FLINT_TEST_CLEANUP(state);
77
78 flint_printf("PASS\n");
79 return 0;
80 }
81