1 /* Test file for mpfr_expm1. 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_expm1 (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_expm1 (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_expm1 mpfr_expm1 46 #endif 47 48 #define TEST_FUNCTION test_expm1 49 #define TEST_RANDOM_EMIN -36 50 #define TEST_RANDOM_EMAX 36 51 #include "tgeneric.c" 52 53 static void 54 special (void) 55 { 56 mpfr_t x, y; 57 int i; 58 59 mpfr_init (x); 60 mpfr_init (y); 61 62 mpfr_set_nan (x); 63 test_expm1 (y, x, MPFR_RNDN); 64 if (!mpfr_nan_p (y)) 65 { 66 printf ("Error for expm1(NaN)\n"); 67 exit (1); 68 } 69 70 mpfr_set_inf (x, 1); 71 test_expm1 (y, x, MPFR_RNDN); 72 if (!mpfr_inf_p (y) || mpfr_sgn (y) < 0) 73 { 74 printf ("Error for expm1(+Inf)\n"); 75 exit (1); 76 } 77 78 mpfr_set_inf (x, -1); 79 test_expm1 (y, x, MPFR_RNDN); 80 if (mpfr_cmp_si (y, -1)) 81 { 82 printf ("Error for expm1(-Inf)\n"); 83 exit (1); 84 } 85 86 mpfr_set_ui (x, 0, MPFR_RNDN); 87 test_expm1 (y, x, MPFR_RNDN); 88 if (MPFR_NOTZERO (y) || MPFR_IS_NEG (y)) 89 { 90 printf ("Error for expm1(+0)\n"); 91 exit (1); 92 } 93 94 mpfr_neg (x, x, MPFR_RNDN); 95 test_expm1 (y, x, MPFR_RNDN); 96 if (MPFR_NOTZERO (y) || MPFR_IS_POS (y)) 97 { 98 printf ("Error for expm1(-0)\n"); 99 exit (1); 100 } 101 102 /* Check overflow of expm1(x) */ 103 mpfr_clear_flags (); 104 mpfr_set_str_binary (x, "1.1E1000000000"); 105 i = test_expm1 (x, x, MPFR_RNDN); 106 MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_IS_POS (x)); 107 MPFR_ASSERTN (mpfr_overflow_p ()); 108 MPFR_ASSERTN (i == 1); 109 110 mpfr_clear_flags (); 111 mpfr_set_str_binary (x, "1.1E1000000000"); 112 i = test_expm1 (x, x, MPFR_RNDU); 113 MPFR_ASSERTN (MPFR_IS_INF (x) && MPFR_IS_POS (x)); 114 MPFR_ASSERTN (mpfr_overflow_p ()); 115 MPFR_ASSERTN (i == 1); 116 117 mpfr_clear_flags (); 118 mpfr_set_str_binary (x, "1.1E1000000000"); 119 i = test_expm1 (x, x, MPFR_RNDD); 120 MPFR_ASSERTN (!MPFR_IS_INF (x) && MPFR_IS_POS (x)); 121 MPFR_ASSERTN (mpfr_overflow_p ()); 122 MPFR_ASSERTN (i == -1); 123 124 /* Check internal underflow of expm1 (x) */ 125 mpfr_set_prec (x, 2); 126 mpfr_clear_flags (); 127 mpfr_set_str_binary (x, "-1.1E1000000000"); 128 i = test_expm1 (x, x, MPFR_RNDN); 129 MPFR_ASSERTN (mpfr_cmp_si (x, -1) == 0); 130 MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ()); 131 MPFR_ASSERTN (i == -1); 132 133 mpfr_set_str_binary (x, "-1.1E1000000000"); 134 i = test_expm1 (x, x, MPFR_RNDD); 135 MPFR_ASSERTN (mpfr_cmp_si (x, -1) == 0); 136 MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ()); 137 MPFR_ASSERTN (i == -1); 138 139 mpfr_set_str_binary (x, "-1.1E1000000000"); 140 i = test_expm1 (x, x, MPFR_RNDZ); 141 MPFR_ASSERTN (mpfr_cmp_str (x, "-0.11", 2, MPFR_RNDN) == 0); 142 MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ()); 143 MPFR_ASSERTN (i == 1); 144 145 mpfr_set_str_binary (x, "-1.1E1000000000"); 146 i = test_expm1 (x, x, MPFR_RNDU); 147 MPFR_ASSERTN (mpfr_cmp_str (x, "-0.11", 2, MPFR_RNDN) == 0); 148 MPFR_ASSERTN (!mpfr_overflow_p () && !mpfr_underflow_p ()); 149 MPFR_ASSERTN (i == 1); 150 151 mpfr_clear (x); 152 mpfr_clear (y); 153 } 154 155 int 156 main (int argc, char *argv[]) 157 { 158 tests_start_mpfr (); 159 160 special (); 161 162 test_generic (MPFR_PREC_MIN, 100, 100); 163 164 data_check ("data/expm1", mpfr_expm1, "mpfr_expm1"); 165 bad_cases (mpfr_expm1, mpfr_log1p, "mpfr_expm1", 256, -256, 255, 166 4, 128, 800, 40); 167 168 tests_end_mpfr (); 169 return 0; 170 } 171