1/* Test file for mpfr_log1p. 2 3Copyright 2001-2023 Free Software Foundation, Inc. 4Contributed by the AriC and Caramba projects, INRIA. 5 6This file is part of the GNU MPFR Library. 7 8The GNU MPFR Library is free software; you can redistribute it and/or modify 9it under the terms of the GNU Lesser General Public License as published by 10the Free Software Foundation; either version 3 of the License, or (at your 11option) any later version. 12 13The GNU MPFR Library is distributed in the hope that it will be useful, but 14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16License for more details. 17 18You should have received a copy of the GNU Lesser General Public License 19along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23#include "mpfr-test.h" 24 25#ifdef CHECK_EXTERNAL 26static int 27test_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 52static void 53special (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 104static void 105other (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 131int 132main (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, 9, 143 4, 128, 800, 40); 144 145 tests_end_mpfr (); 146 return 0; 147} 148