1 /* Test file for mpfr_ai. 2 3 Copyright 2010-2018 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 #define TEST_FUNCTION mpfr_ai 26 #define TEST_RANDOM_EMIN -5 27 #define TEST_RANDOM_EMAX 5 28 #define REDUCE_EMAX 7 /* this is to avoid that test_generic() calls mpfr_ai 29 with too large inputs. FIXME: remove this once 30 mpfr_ai can handle large inputs */ 31 #include "tgeneric.c" 32 33 static void 34 check_large (void) 35 { 36 mpfr_t x, y, z; 37 38 mpfr_init2 (x, 38); 39 mpfr_init2 (y, 110); 40 mpfr_init2 (z, 110); 41 mpfr_set_str_binary (x, "-1E8"); 42 mpfr_ai (y, x, MPFR_RNDN); 43 mpfr_set_str_binary (z, "-10001110100001011111110001100011101100011100010000110100100101011111011100000101110101010010000000101110011111E-112"); 44 if (mpfr_equal_p (y, z) == 0) 45 { 46 printf ("Error in mpfr_ai for x=-2^8\n"); 47 exit (1); 48 } 49 #if 0 /* disabled since mpfr_ai does not currently handle large arguments */ 50 mpfr_set_str_binary (x, "-1E26"); 51 mpfr_ai (y, x, MPFR_RNDN); 52 mpfr_set_str_binary (z, "-110001111100000011001010010101001101001011001011101011001010100100001110001101101101000010000011001000001011E-118"); 53 if (mpfr_equal_p (y, z) == 0) 54 { 55 printf ("Error in mpfr_ai for x=-2^26\n"); 56 exit (1); 57 } 58 mpfr_set_str_binary (x, "-0.11111111111111111111111111111111111111E1073741823"); 59 mpfr_ai (y, x, MPFR_RNDN); 60 /* FIXME: compute the correctly rounded value we should get for Ai(x), 61 and check we get this value */ 62 #endif 63 mpfr_clear (x); 64 mpfr_clear (y); 65 mpfr_clear (z); 66 } 67 68 static void 69 check_zero (void) 70 { 71 mpfr_t x, y, r; 72 73 mpfr_init2 (x, 53); 74 mpfr_init2 (y, 53); 75 mpfr_init2 (r, 53); 76 77 mpfr_set_str_binary (r, "10110101110001100011110010110001001110001010110111E-51"); 78 79 mpfr_set_ui (x, 0, MPFR_RNDN); 80 mpfr_ai (y, x, MPFR_RNDN); 81 if (mpfr_equal_p (y, r) == 0) 82 { 83 printf ("Error in mpfr_ai for x=0\n"); 84 printf ("Expected "); mpfr_dump (r); 85 printf ("Got "); mpfr_dump (y); 86 exit (1); 87 } 88 mpfr_clear (x); 89 mpfr_clear (y); 90 mpfr_clear (r); 91 } 92 93 static void 94 bug20180107 (void) 95 { 96 mpfr_t x, y, z; 97 mpfr_exp_t emin; 98 int inex; 99 mpfr_flags_t flags; 100 101 mpfr_init2 (x, 152); 102 mpfr_init2 (y, 11); 103 mpfr_init2 (z, 11); 104 mpfr_set_str_binary (x, "0.11010101100111000111001001010110101001100001011110101111000010100111011101011110000100111011101100100100001010000110100011001000111010010001110000011100E5"); 105 emin = mpfr_get_emin (); 106 mpfr_set_emin (-134); 107 mpfr_clear_flags (); 108 inex = mpfr_ai (y, x, MPFR_RNDA); 109 flags = __gmpfr_flags; 110 /* result should be 0.10011100000E-135 with unlimited exponent range, 111 and thus should be rounded to 0.1E-134 */ 112 mpfr_set_str_binary (z, "0.1E-134"); 113 MPFR_ASSERTN (mpfr_equal_p (y, z)); 114 MPFR_ASSERTN (inex > 0); 115 MPFR_ASSERTN (flags == (MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT)); 116 117 mpfr_set_prec (x, 2); 118 mpfr_set_str_binary (x, "0.11E7"); 119 mpfr_set_prec (y, 2); 120 mpfr_clear_flags (); 121 inex = mpfr_ai (y, x, MPFR_RNDA); 122 flags = __gmpfr_flags; 123 /* result should be 1.0E-908 with unlimited exponent range, 124 and thus should be rounded to 0.1E-134 */ 125 mpfr_set_str_binary (z, "0.1E-134"); 126 MPFR_ASSERTN (mpfr_equal_p (y, z)); 127 MPFR_ASSERTN (inex > 0); 128 MPFR_ASSERTN (flags == (MPFR_FLAGS_UNDERFLOW | MPFR_FLAGS_INEXACT)); 129 130 mpfr_set_emin (emin); 131 mpfr_clear (x); 132 mpfr_clear (y); 133 mpfr_clear (z); 134 } 135 136 int 137 main (int argc, char *argv[]) 138 { 139 tests_start_mpfr (); 140 141 bug20180107 (); 142 check_large (); 143 check_zero (); 144 145 test_generic (MPFR_PREC_MIN, 100, 5); 146 147 tests_end_mpfr (); 148 return 0; 149 } 150