1 /* Test file for mpfr_abs. 2 3 Copyright 2000, 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 #include <float.h> 26 27 #include "mpfr-test.h" 28 29 static void 30 check_inexact (void) 31 { 32 mpfr_prec_t p, q; 33 mpfr_t x, y, absx; 34 int rnd; 35 int inexact, cmp; 36 37 mpfr_init (x); 38 mpfr_init (y); 39 mpfr_init (absx); 40 41 for (p=2; p<500; p++) 42 { 43 mpfr_set_prec (x, p); 44 mpfr_set_prec (absx, p); 45 mpfr_urandomb (x, RANDS); 46 if (randlimb () % 2) 47 { 48 mpfr_set (absx, x, MPFR_RNDN); 49 mpfr_neg (x, x, MPFR_RNDN); 50 } 51 else 52 mpfr_set (absx, x, MPFR_RNDN); 53 for (q=2; q<2*p; q++) 54 { 55 mpfr_set_prec (y, q); 56 RND_LOOP (rnd) 57 { 58 inexact = mpfr_abs (y, x, (mpfr_rnd_t) rnd); 59 cmp = mpfr_cmp (y, absx); 60 if (((inexact == 0) && (cmp != 0)) || 61 ((inexact > 0) && (cmp <= 0)) || 62 ((inexact < 0) && (cmp >= 0))) 63 { 64 printf ("Wrong inexact flag: expected %d, got %d\n", 65 cmp, inexact); 66 printf ("x="); mpfr_print_binary (x); puts (""); 67 printf ("absx="); mpfr_print_binary (absx); puts (""); 68 printf ("y="); mpfr_print_binary (y); puts (""); 69 exit (1); 70 } 71 } 72 } 73 } 74 75 mpfr_clear (x); 76 mpfr_clear (y); 77 mpfr_clear (absx); 78 } 79 80 static void 81 check_cmp (int argc, char *argv[]) 82 { 83 mpfr_t x, y; 84 int n, k; 85 86 mpfr_inits2 (53, x, y, (mpfr_ptr) 0); 87 88 mpfr_set_ui(x, 1, MPFR_RNDN); 89 (mpfr_abs) (x, x, MPFR_RNDN); 90 if (mpfr_cmp_ui (x, 1)) 91 { 92 printf ("Error in mpfr_abs(1.0)\n"); 93 exit (1); 94 } 95 96 mpfr_set_si(x, -1, MPFR_RNDN); 97 mpfr_abs(x, x, MPFR_RNDN); 98 if (mpfr_cmp_ui (x, 1)) 99 { 100 printf ("Error in mpfr_abs(1.0)\n"); 101 exit (1); 102 } 103 104 mpfr_set_si(x, -1, MPFR_RNDN); 105 mpfr_abs(x, x, MPFR_RNDN); 106 if (mpfr_cmp_ui (x, 1)) 107 { 108 printf ("Error in mpfr_abs(-1.0)\n"); 109 exit (1); 110 } 111 112 mpfr_set_inf (x, 1); 113 mpfr_abs (x, x, MPFR_RNDN); 114 if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0)) 115 { 116 printf ("Error in mpfr_abs(Inf).\n"); 117 exit (1); 118 } 119 mpfr_set_inf (x, -1); 120 mpfr_abs (x, x, MPFR_RNDN); 121 if (!mpfr_inf_p(x) || (mpfr_sgn(x) <= 0)) 122 { 123 printf ("Error in mpfr_abs(-Inf).\n"); 124 exit (1); 125 } 126 127 MPFR_SET_NAN(x); 128 mpfr_abs (x, x, MPFR_RNDN); 129 if (!MPFR_IS_NAN(x)) 130 { 131 printf ("Error in mpfr_abs(NAN).\n"); 132 exit (1); 133 } 134 135 n = (argc==1) ? 25000 : atoi(argv[1]); 136 for (k = 1; k <= n; k++) 137 { 138 mpfr_rnd_t rnd; 139 int sign = SIGN_RAND (); 140 141 mpfr_urandomb (x, RANDS); 142 MPFR_SET_SIGN (x, sign); 143 rnd = RND_RAND (); 144 mpfr_abs (y, x, rnd); 145 MPFR_SET_POS (x); 146 if (mpfr_cmp (x, y)) 147 { 148 printf ("Mismatch for sign=%d and x=", sign); 149 mpfr_print_binary (x); 150 printf ("\nResults="); 151 mpfr_print_binary (y); 152 putchar ('\n'); 153 exit (1); 154 } 155 } 156 157 mpfr_clears (x, y, (mpfr_ptr) 0); 158 } 159 160 #define TEST_FUNCTION mpfr_abs 161 #include "tgeneric.c" 162 163 int 164 main (int argc, char *argv[]) 165 { 166 mpfr_test_init (); 167 tests_start_mpfr (); 168 169 check_inexact (); 170 check_cmp (argc, argv); 171 172 test_generic (2, 1000, 10); 173 174 tests_end_mpfr (); 175 return 0; 176 } 177