1 /* tpow_ui -- test file for mpc_pow_ui.
2
3 Copyright (C) 2009, 2010, 2012, 2013 INRIA
4
5 This file is part of GNU MPC.
6
7 GNU MPC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU Lesser General Public License as published by the
9 Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
11
12 GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
15 more details.
16
17 You should have received a copy of the GNU Lesser General Public License
18 along with this program. If not, see http://www.gnu.org/licenses/ .
19 */
20
21 #include <limits.h> /* for CHAR_BIT */
22 #include "mpc-tests.h"
23
24 static void
compare_mpc_pow(mpfr_prec_t pmax,int iter,unsigned long nbits)25 compare_mpc_pow (mpfr_prec_t pmax, int iter, unsigned long nbits)
26 {
27 mpfr_prec_t p;
28 mpc_t x, y, z, t;
29 unsigned long n;
30 int i, inex_pow, inex_pow_ui;
31 mpc_rnd_t rnd1, rnd2, rnd;
32
33 mpc_init3 (y, sizeof (unsigned long) * CHAR_BIT, MPFR_PREC_MIN);
34 for (p = MPFR_PREC_MIN; p <= pmax; p++)
35 for (i = 0; i < iter; i++)
36 {
37 mpc_init2 (x, p);
38 mpc_init2 (z, p);
39 mpc_init2 (t, p);
40 mpc_urandom (x, rands);
41 n = gmp_urandomb_ui (rands, nbits); /* 0 <= n < 2^nbits */
42 mpc_set_ui (y, n, MPC_RNDNN);
43 for (rnd1 = 0; rnd1 < 4; rnd1 ++)
44 for (rnd2 = 0; rnd2 < 4; rnd2 ++)
45 {
46 rnd = MPC_RND (rnd1, rnd2);
47 inex_pow = mpc_pow (z, x, y, rnd);
48 inex_pow_ui = mpc_pow_ui (t, x, n, rnd);
49 if (mpc_cmp (z, t) != 0)
50 {
51 printf ("mpc_pow and mpc_pow_ui differ for x=");
52 mpc_out_str (stdout, 16, 0, x, MPC_RNDNN);
53 printf (" n=%li p=%lu rnd=%d\n", n, p, rnd);
54 printf ("mpc_pow gives ");
55 mpc_out_str (stdout, 16, 0, z, MPC_RNDNN);
56 printf ("\nmpc_pow_ui gives ");
57 mpc_out_str (stdout, 16, 0, t, MPC_RNDNN);
58 printf ("\n");
59 exit (1);
60 }
61 if (inex_pow != inex_pow_ui)
62 {
63 printf ("mpc_pow and mpc_pow_ui give different flags for x=");
64 mpc_out_str (stdout, 16, 0, x, MPC_RNDNN);
65 printf (" n=%li p=%lu rnd=%d\n", n, p, rnd);
66 printf ("mpc_pow gives %d\n", inex_pow);
67 printf ("mpc_pow_ui gives %d\n", inex_pow_ui);
68 exit (1);
69 }
70 }
71 mpc_clear (x);
72 mpc_clear (z);
73 mpc_clear (t);
74 }
75 mpc_clear (y);
76 }
77
78 #define MPC_FUNCTION_CALL \
79 P[0].mpc_inex = mpc_pow_ui (P[1].mpc, P[2].mpc, P[3].ui, P[4].mpc_rnd)
80 #define MPC_FUNCTION_CALL_REUSE_OP1 \
81 P[0].mpc_inex = mpc_pow_ui (P[1].mpc, P[1].mpc, P[3].ui, P[4].mpc_rnd)
82
83 #include "data_check.tpl"
84
85 int
main(int argc,char * argv[])86 main (int argc, char *argv[])
87 {
88 mpc_t z;
89
90 if (argc != 1)
91 {
92 mpfr_prec_t p;
93 long int n, k;
94 mpc_t res;
95 if (argc != 3 && argc != 4)
96 {
97 printf ("Usage: tpow_ui precision exponent [k]\n");
98 exit (1);
99 }
100 p = atoi (argv[1]);
101 n = atoi (argv[2]);
102 MPC_ASSERT (n >= 0);
103 k = (argc > 3) ? atoi (argv[3]) : 1;
104 MPC_ASSERT (k >= 0);
105 mpc_init2 (z, p);
106 mpc_init2 (res, p);
107 mpfr_const_pi (mpc_realref (z), MPFR_RNDN);
108 mpfr_div_2exp (mpc_realref (z), mpc_realref (z), 2, MPFR_RNDN);
109 mpfr_const_log2 (mpc_imagref (z), MPFR_RNDN);
110 while (k--)
111 mpc_pow_ui (res, z, (unsigned long int) n, MPC_RNDNN);
112 mpc_clear (z);
113 mpc_clear (res);
114 return 0;
115 }
116
117 test_start ();
118
119 data_check_template ("pow_ui.dsc", "pow_ui.dat");
120
121 compare_mpc_pow (100, 5, 19);
122
123 test_end ();
124
125 return 0;
126 }
127