1 /* Test file for mpfr_add1sp. 2 3 Copyright 2004, 2005, 2006, 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 26 #include "mpfr-test.h" 27 28 static void check_special (void); 29 static void check_random (mpfr_prec_t p); 30 31 static void 32 check_overflow (void) 33 { 34 mpfr_t x, y, z1, z2; 35 mpfr_exp_t emin, emax; 36 37 emin = mpfr_get_emin (); 38 emax = mpfr_get_emax (); 39 40 set_emin (-1021); 41 set_emax (1024); 42 43 mpfr_inits (x, y, z1, z2, (mpfr_ptr) 0); 44 45 mpfr_set_str1 (x, "8.00468257869324898448e+307"); 46 mpfr_set_str1 (y, "7.44784712422708645156e+307"); 47 mpfr_add1sp (z1, x, y, MPFR_RNDN); 48 mpfr_add1 (z2, x, y, MPFR_RNDN); 49 if (mpfr_cmp (z1, z2)) 50 { 51 printf ("Overflow bug in add1sp.\n"); 52 exit (1); 53 } 54 mpfr_clears (x, y, z1, z2, (mpfr_ptr) 0); 55 56 set_emin (emin); 57 set_emax (emax); 58 } 59 60 int 61 main (void) 62 { 63 mpfr_prec_t p; 64 65 tests_start_mpfr (); 66 67 check_special (); 68 for(p = 2 ; p < 200 ; p++) 69 check_random (p); 70 check_overflow (); 71 72 tests_end_mpfr (); 73 return 0; 74 } 75 76 #define STD_ERROR \ 77 {\ 78 printf("ERROR: for %s and p=%lu and i=%d:\nB=",\ 79 mpfr_print_rnd_mode ((mpfr_rnd_t) r), p, i);\ 80 mpfr_print_binary(b);\ 81 printf("\nC="); mpfr_print_binary(c);\ 82 printf("\nadd1 : "); mpfr_print_binary(a1);\ 83 printf("\nadd1sp: "); mpfr_print_binary(a2);\ 84 putchar('\n');\ 85 exit(1);\ 86 } 87 88 #define STD_ERROR2 \ 89 {\ 90 printf("ERROR: Wrong inexact flag for %s and p=%lu and i=%d:\nB=",\ 91 mpfr_print_rnd_mode ((mpfr_rnd_t) r), p, i);\ 92 mpfr_print_binary(b);\ 93 printf("\nC="); mpfr_print_binary(c);\ 94 printf("\nA="); mpfr_print_binary(a1);\ 95 printf("\nAdd1: %d. Add1sp: %d\n", \ 96 inexact1, inexact2); \ 97 exit(1);\ 98 } 99 100 #define SET_PREC(_p) \ 101 { \ 102 p = _p; \ 103 mpfr_set_prec(a1, _p); mpfr_set_prec(a2, _p); \ 104 mpfr_set_prec(b, _p); mpfr_set_prec(c, _p); \ 105 } 106 107 static void 108 check_random (mpfr_prec_t p) 109 { 110 mpfr_t a1,b,c,a2; 111 int r; 112 int i, inexact1, inexact2; 113 114 mpfr_inits2 (p, a1, b, c, a2, (mpfr_ptr) 0); 115 116 for (i = 0 ; i < 500 ; i++) 117 { 118 mpfr_urandomb (b, RANDS); 119 mpfr_urandomb (c, RANDS); 120 if (MPFR_IS_PURE_FP(b) && MPFR_IS_PURE_FP(c)) 121 { 122 if (MPFR_GET_EXP(b) < MPFR_GET_EXP(c)) 123 mpfr_swap(b, c); 124 if (MPFR_IS_PURE_FP(b) && MPFR_IS_PURE_FP(c)) 125 for (r = 0 ; r < MPFR_RND_MAX ; r++) 126 { 127 inexact1 = mpfr_add1(a1, b, c, (mpfr_rnd_t) r); 128 inexact2 = mpfr_add1sp(a2, b, c, (mpfr_rnd_t) r); 129 if (mpfr_cmp(a1, a2)) 130 STD_ERROR; 131 if (inexact1 != inexact2) 132 STD_ERROR2; 133 } 134 } 135 } 136 137 mpfr_clears (a1, a2, b, c, (mpfr_ptr) 0); 138 } 139 140 static void 141 check_special (void) 142 { 143 mpfr_t a1,a2,b,c; 144 int r; 145 mpfr_prec_t p; 146 int i = -1, inexact1, inexact2; 147 148 mpfr_inits (a1, a2, b, c, (mpfr_ptr) 0); 149 150 for (r = 0 ; r < MPFR_RND_MAX ; r++) 151 { 152 SET_PREC(53); 153 mpfr_set_str1 (b, "1@100"); 154 mpfr_set_str1 (c, "1@1"); 155 inexact1 = mpfr_add1(a1, b, c, (mpfr_rnd_t) r); 156 inexact2 = mpfr_add1sp(a2, b, c, (mpfr_rnd_t) r); 157 if (mpfr_cmp(a1, a2)) 158 STD_ERROR; 159 if (inexact1 != inexact2) 160 STD_ERROR2; 161 mpfr_set_str_binary (b, "1E53"); 162 mpfr_set_str_binary (c, "1E0"); 163 inexact1 = mpfr_add1(a1, b, c, (mpfr_rnd_t) r); 164 inexact2 = mpfr_add1sp(a2, b, c, (mpfr_rnd_t) r); 165 if (mpfr_cmp(a1, a2)) 166 STD_ERROR; 167 if (inexact1 != inexact2) 168 STD_ERROR2; 169 } 170 171 mpfr_set_prec (c, 2); 172 mpfr_set_prec (a1, 2); 173 mpfr_set_prec (a2, 2); 174 mpfr_set_str_binary (c, "1.0e1"); 175 mpfr_set_str_binary (a2, "1.1e-1"); 176 mpfr_set_str_binary (a1, "0.11E2"); 177 mpfr_add1sp (a2, c, a2, MPFR_RNDN); 178 if (mpfr_cmp (a1, a2)) 179 { 180 printf ("Regression reuse test failed!\n"); 181 exit (1); 182 } 183 184 mpfr_clears (a1, a2, b, c, (mpfr_ptr) 0); 185 } 186