1/* tpow_ui -- test file for mpc_pow_ui. 2 3Copyright (C) 2009, 2010 INRIA 4 5This file is part of GNU MPC. 6 7GNU MPC is free software; you can redistribute it and/or modify it under 8the terms of the GNU Lesser General Public License as published by the 9Free Software Foundation; either version 3 of the License, or (at your 10option) any later version. 11 12GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for 15more details. 16 17You should have received a copy of the GNU Lesser General Public License 18along 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 24static void 25compare_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 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 (rnd = 0; rnd < 16; rnd ++) 44 { 45 inex_pow = mpc_pow (z, x, y, rnd); 46 inex_pow_ui = mpc_pow_ui (t, x, n, rnd); 47 if (mpc_cmp (z, t) != 0) 48 { 49 printf ("mpc_pow and mpc_pow_ui differ for x="); 50 mpc_out_str (stdout, 10, 0, x, MPC_RNDNN); 51 printf (" n=%lu\n", n); 52 printf ("mpc_pow gives "); 53 mpc_out_str (stdout, 10, 0, z, MPC_RNDNN); 54 printf ("\nmpc_pow_ui gives "); 55 mpc_out_str (stdout, 10, 0, t, MPC_RNDNN); 56 printf ("\n"); 57 exit (1); 58 } 59 if (inex_pow != inex_pow_ui) 60 { 61 printf ("mpc_pow and mpc_pow_ui give different flags for x="); 62 mpc_out_str (stdout, 10, 0, x, MPC_RNDNN); 63 printf (" n=%lu\n", n); 64 printf ("mpc_pow gives %d\n", inex_pow); 65 printf ("mpc_pow_ui gives %d\n", inex_pow_ui); 66 exit (1); 67 } 68 } 69 mpc_clear (x); 70 mpc_clear (z); 71 mpc_clear (t); 72 } 73 mpc_clear (y); 74} 75 76int 77main (int argc, char *argv[]) 78{ 79 mpc_t z; 80 81 DECL_FUNC (CCU, f, mpc_pow_ui); 82 83 if (argc != 1) 84 { 85 mpfr_prec_t p; 86 long int n, k; 87 mpc_t res; 88 if (argc != 3 && argc != 4) 89 { 90 printf ("Usage: tpow_ui precision exponent [k]\n"); 91 exit (1); 92 } 93 p = atoi (argv[1]); 94 n = atoi (argv[2]); 95 MPC_ASSERT (n >= 0); 96 k = (argc > 3) ? atoi (argv[3]) : 1; 97 MPC_ASSERT (k >= 0); 98 mpc_init2 (z, p); 99 mpc_init2 (res, p); 100 mpfr_const_pi (mpc_realref (z), GMP_RNDN); 101 mpfr_div_2exp (mpc_realref (z), mpc_realref (z), 2, GMP_RNDN); 102 mpfr_const_log2 (mpc_imagref (z), GMP_RNDN); 103 while (k--) 104 mpc_pow_ui (res, z, (unsigned long int) n, MPC_RNDNN); 105 mpc_clear (z); 106 mpc_clear (res); 107 return 0; 108 } 109 110 test_start (); 111 data_check (f, "pow_ui.dat"); 112 113 compare_mpc_pow (100, 5, 19); 114 115 test_end (); 116 117 return 0; 118} 119