1 /* Test file for mpfr_log1p. 2 3 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 4 Contributed by the AriC and Caramel 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 <stdio.h> 24 #include <stdlib.h> 25 26 #include "mpfr-test.h" 27 28 #ifdef CHECK_EXTERNAL 29 static int 30 test_log1p (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode) 31 { 32 int res; 33 int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53; 34 if (ok) 35 { 36 mpfr_print_raw (b); 37 } 38 res = mpfr_log1p (a, b, rnd_mode); 39 if (ok) 40 { 41 printf (" "); 42 mpfr_print_raw (a); 43 printf ("\n"); 44 } 45 return res; 46 } 47 #else 48 #define test_log1p mpfr_log1p 49 #endif 50 51 #define TEST_FUNCTION test_log1p 52 #define TEST_RANDOM_EMAX 80 53 #include "tgeneric.c" 54 55 static void 56 special (void) 57 { 58 mpfr_t x; 59 int inex; 60 61 mpfr_init (x); 62 63 mpfr_set_nan (x); 64 mpfr_clear_flags (); 65 inex = test_log1p (x, x, MPFR_RNDN); 66 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 67 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 68 69 mpfr_set_inf (x, -1); 70 mpfr_clear_flags (); 71 inex = test_log1p (x, x, MPFR_RNDN); 72 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 73 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 74 75 mpfr_set_inf (x, 1); 76 mpfr_clear_flags (); 77 inex = test_log1p (x, x, MPFR_RNDN); 78 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0); 79 MPFR_ASSERTN (__gmpfr_flags == 0); 80 81 mpfr_set_ui (x, 0, MPFR_RNDN); 82 mpfr_clear_flags (); 83 inex = test_log1p (x, x, MPFR_RNDN); 84 MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0); 85 MPFR_ASSERTN (__gmpfr_flags == 0); 86 mpfr_neg (x, x, MPFR_RNDN); 87 mpfr_clear_flags (); 88 inex = test_log1p (x, x, MPFR_RNDN); 89 MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0); 90 MPFR_ASSERTN (__gmpfr_flags == 0); 91 92 mpfr_set_si (x, -1, MPFR_RNDN); 93 mpfr_clear_flags (); 94 inex = test_log1p (x, x, MPFR_RNDN); 95 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 96 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0); 97 98 mpfr_set_si (x, -2, MPFR_RNDN); 99 mpfr_clear_flags (); 100 inex = test_log1p (x, x, MPFR_RNDN); 101 MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); 102 MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); 103 104 mpfr_clear (x); 105 } 106 107 static void 108 other (void) 109 { 110 mpfr_t x, y; 111 112 /* Bug reported by Guillaume Melquiond on 2006-08-14. */ 113 mpfr_init2 (x, 53); 114 mpfr_set_str (x, "-1.5e4f72873ed9a@-100", 16, MPFR_RNDN); 115 mpfr_init2 (y, 57); 116 mpfr_log1p (y, x, MPFR_RNDU); 117 if (mpfr_cmp (x, y) != 0) 118 { 119 printf ("Error in tlog1p for x = "); 120 mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN); 121 printf (", rnd = MPFR_RNDU\nExpected "); 122 mpfr_out_str (stdout, 16, 15, x, MPFR_RNDN); 123 printf ("\nGot "); 124 mpfr_out_str (stdout, 16, 15, y, MPFR_RNDN); 125 printf ("\n"); 126 exit (1); 127 } 128 129 mpfr_clear (y); 130 mpfr_clear (x); 131 return; 132 } 133 134 int 135 main (int argc, char *argv[]) 136 { 137 tests_start_mpfr (); 138 139 special (); 140 other (); 141 142 test_generic (2, 100, 50); 143 144 data_check ("data/log1p", mpfr_log1p, "mpfr_log1p"); 145 bad_cases (mpfr_log1p, mpfr_expm1, "mpfr_log1p", 256, -64, 40, 146 4, 128, 800, 40); 147 148 tests_end_mpfr (); 149 return 0; 150 } 151