1 /* Test file for mpfr_log1p. 2 3 Copyright 2001-2018 Free Software Foundation, Inc. 4 Contributed by the AriC and Caramba projects, INRIA. 5 6 This file is part of the GNU MPFR Library. 7 8 The GNU MPFR Library is free software; you can redistribute it and/or modify 9 it under the terms of the GNU Lesser General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or (at your 11 option) any later version. 12 13 The GNU MPFR Library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16 License for more details. 17 18 You should have received a copy of the GNU Lesser General Public License 19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 #include "mpfr-test.h" 24 25 #ifdef CHECK_EXTERNAL 26 static int 27 test_log1p (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode) 28 { 29 int res; 30 int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53; 31 if (ok) 32 { 33 mpfr_print_raw (b); 34 } 35 res = mpfr_log1p (a, b, rnd_mode); 36 if (ok) 37 { 38 printf (" "); 39 mpfr_print_raw (a); 40 printf ("\n"); 41 } 42 return res; 43 } 44 #else 45 #define test_log1p mpfr_log1p 46 #endif 47 48 #define TEST_FUNCTION test_log1p 49 #define TEST_RANDOM_EMAX 80 50 #include "tgeneric.c" 51 52 static void 53 special (void) 54 { 55 mpfr_t x; 56 int inex; 57 58 mpfr_init (x); 59 60 mpfr_set_nan (x); 61 mpfr_clear_flags (); 62 inex = test_log1p (x, x, MPFR_RNDN); 63 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 64 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 65 66 mpfr_set_inf (x, -1); 67 mpfr_clear_flags (); 68 inex = test_log1p (x, x, MPFR_RNDN); 69 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 70 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 71 72 mpfr_set_inf (x, 1); 73 mpfr_clear_flags (); 74 inex = test_log1p (x, x, MPFR_RNDN); 75 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0); 76 MPFR_ASSERTN (__gmpfr_flags == 0); 77 78 mpfr_set_ui (x, 0, MPFR_RNDN); 79 mpfr_clear_flags (); 80 inex = test_log1p (x, x, MPFR_RNDN); 81 MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0); 82 MPFR_ASSERTN (__gmpfr_flags == 0); 83 mpfr_neg (x, x, MPFR_RNDN); 84 mpfr_clear_flags (); 85 inex = test_log1p (x, x, MPFR_RNDN); 86 MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0); 87 MPFR_ASSERTN (__gmpfr_flags == 0); 88 89 mpfr_set_si (x, -1, MPFR_RNDN); 90 mpfr_clear_flags (); 91 inex = test_log1p (x, x, MPFR_RNDN); 92 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 93 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0); 94 95 mpfr_set_si (x, -2, MPFR_RNDN); 96 mpfr_clear_flags (); 97 inex = test_log1p (x, x, MPFR_RNDN); 98 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 99 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 100 101 mpfr_clear (x); 102 } 103 104 static void 105 other (void) 106 { 107 mpfr_t x, y; 108 109 /* Bug reported by Guillaume Melquiond on 2006-08-14. */ 110 mpfr_init2 (x, 53); 111 mpfr_set_str (x, "-1.5e4f72873ed9a@-100", 16, MPFR_RNDN); 112 mpfr_init2 (y, 57); 113 mpfr_log1p (y, x, MPFR_RNDU); 114 if (mpfr_cmp (x, y) != 0) 115 { 116 printf ("Error in tlog1p for x = "); 117 mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN); 118 printf (", rnd = MPFR_RNDU\nExpected "); 119 mpfr_out_str (stdout, 16, 15, x, MPFR_RNDN); 120 printf ("\nGot "); 121 mpfr_out_str (stdout, 16, 15, y, MPFR_RNDN); 122 printf ("\n"); 123 exit (1); 124 } 125 126 mpfr_clear (y); 127 mpfr_clear (x); 128 return; 129 } 130 131 int 132 main (int argc, char *argv[]) 133 { 134 tests_start_mpfr (); 135 136 special (); 137 other (); 138 139 test_generic (MPFR_PREC_MIN, 100, 50); 140 141 data_check ("data/log1p", mpfr_log1p, "mpfr_log1p"); 142 bad_cases (mpfr_log1p, mpfr_expm1, "mpfr_log1p", 256, -64, 40, 143 4, 128, 800, 40); 144 145 tests_end_mpfr (); 146 return 0; 147 } 148