1 /* Test file for mpfr_add_d 2 3 Copyright 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 Contributed by the Arenaire and Cacao 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 #include <float.h> 26 27 #include "mpfr-test.h" 28 29 #if MPFR_VERSION >= MPFR_VERSION_NUM(2,4,0) 30 31 static void 32 check_regulars (void) 33 { 34 mpfr_t x, y, z; 35 double d; 36 int inexact; 37 38 /* (1) check with enough precision */ 39 mpfr_init2 (x, IEEE_DBL_MANT_DIG); 40 mpfr_init2 (y, IEEE_DBL_MANT_DIG); 41 mpfr_init2 (z, IEEE_DBL_MANT_DIG); 42 43 mpfr_set_str (y, "4096", 10, MPFR_RNDN); 44 d = 0.125; 45 mpfr_clear_flags (); 46 inexact = mpfr_add_d (x, y, d, MPFR_RNDN); 47 if (inexact != 0) 48 { 49 printf ("Inexact flag error in mpfr_add_d (1)\n"); 50 exit (1); 51 } 52 mpfr_set_str (z, "4096.125", 10, MPFR_RNDN); 53 if (mpfr_cmp (z, x)) 54 { 55 printf ("Error in mpfr_add_d ("); 56 mpfr_out_str (stdout, 10, 7, y, MPFR_RNDN); 57 printf (" + %.20g)\nexpected ", d); 58 mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN); 59 printf ("\ngot "); 60 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); 61 printf ("\n"); 62 exit (1); 63 } 64 65 /* (2) check inexact flag */ 66 mpfr_set_prec (x, 2); 67 mpfr_set_prec (z, 2); 68 69 mpfr_clear_flags (); 70 inexact = mpfr_add_d (x, y, d, MPFR_RNDN); 71 if (inexact == 0) 72 { 73 printf ("Inexact flag error in mpfr_add_d (2)\n"); 74 exit (1); 75 } 76 mpfr_set_str (z, "4096.125", 10, MPFR_RNDN); 77 if (mpfr_cmp (z, x)) 78 { 79 printf ("Error in mpfr_add_d ("); 80 mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN); 81 printf (" + %.20g)\nexpected ", d); 82 mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN); 83 printf ("\ngot "); 84 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); 85 printf ("\n"); 86 exit (1); 87 } 88 89 mpfr_clears (x, y, z, (mpfr_ptr) 0); 90 } 91 92 static void 93 check_nans (void) 94 { 95 mpfr_t x, y; 96 int inexact; 97 98 mpfr_init2 (x, 123); 99 mpfr_init2 (y, 123); 100 101 /* nan + 1.0 is nan */ 102 mpfr_set_nan (x); 103 mpfr_clear_flags (); 104 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN); 105 MPFR_ASSERTN (inexact == 0); 106 MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0); 107 MPFR_ASSERTN (mpfr_nan_p (y)); 108 109 /* +inf + 1.0 == +inf */ 110 mpfr_set_inf (x, 1); 111 mpfr_clear_flags (); 112 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN); 113 MPFR_ASSERTN (inexact == 0); 114 MPFR_ASSERTN (__gmpfr_flags == 0); 115 MPFR_ASSERTN (mpfr_inf_p (y)); 116 MPFR_ASSERTN (MPFR_IS_POS (y)); 117 118 /* -inf + 1.0 == -inf */ 119 mpfr_set_inf (x, -1); 120 mpfr_clear_flags (); 121 inexact = mpfr_add_d (y, x, 1.0, MPFR_RNDN); 122 MPFR_ASSERTN (inexact == 0); 123 MPFR_ASSERTN (__gmpfr_flags == 0); 124 MPFR_ASSERTN (mpfr_inf_p (y)); 125 MPFR_ASSERTN (MPFR_IS_NEG (y)); 126 127 mpfr_clear (x); 128 mpfr_clear (y); 129 } 130 131 #define TEST_FUNCTION mpfr_add_d 132 #define DOUBLE_ARG2 133 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS) 134 #include "tgeneric.c" 135 136 int 137 main (void) 138 { 139 tests_start_mpfr (); 140 141 check_nans (); 142 check_regulars (); 143 144 test_generic (2, 1000, 100); 145 146 tests_end_mpfr (); 147 return 0; 148 } 149 150 #else 151 152 int 153 main (void) 154 { 155 printf ("Warning! Test disabled for this MPFR version.\n"); 156 return 0; 157 } 158 159 #endif 160