1 /* Test file for mpfr_mul_d 2 3 Copyright 2007-2016 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 <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_nans (void) 33 { 34 mpfr_t x, y; 35 int inexact; 36 37 mpfr_init2 (x, 123); 38 mpfr_init2 (y, 123); 39 40 /* nan * 1.0 is nan */ 41 mpfr_set_nan (x); 42 mpfr_clear_flags(); 43 inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN); 44 MPFR_ASSERTN (inexact == 0); 45 MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0); 46 MPFR_ASSERTN (mpfr_nan_p (y)); 47 48 /* +inf * 1.0 == +inf */ 49 mpfr_set_inf (x, 1); 50 mpfr_clear_flags(); 51 inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN); 52 MPFR_ASSERTN (inexact == 0); 53 MPFR_ASSERTN (__gmpfr_flags == 0); 54 MPFR_ASSERTN (mpfr_inf_p (y)); 55 MPFR_ASSERTN (MPFR_IS_POS (y)); 56 57 /* +inf * 0.0 is nan */ 58 mpfr_clear_flags(); 59 inexact = mpfr_mul_d (y, x, 0.0, MPFR_RNDN); 60 MPFR_ASSERTN (inexact == 0); 61 MPFR_ASSERTN ((__gmpfr_flags ^ MPFR_FLAGS_NAN) == 0); 62 MPFR_ASSERTN (mpfr_nan_p (y)); 63 64 /* -inf * 1.0 == -inf */ 65 mpfr_set_inf (x, -1); 66 mpfr_clear_flags(); 67 inexact = mpfr_mul_d (y, x, 1.0, MPFR_RNDN); 68 MPFR_ASSERTN (inexact == 0); 69 MPFR_ASSERTN (__gmpfr_flags == 0); 70 MPFR_ASSERTN (mpfr_inf_p (y)); 71 MPFR_ASSERTN (MPFR_IS_NEG (y)); 72 73 mpfr_clear (x); 74 mpfr_clear (y); 75 } 76 77 #define TEST_FUNCTION mpfr_mul_d 78 #define DOUBLE_ARG2 79 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS) 80 #include "tgeneric.c" 81 82 int 83 main (void) 84 { 85 mpfr_t x, y, z; 86 double d; 87 int inexact; 88 89 tests_start_mpfr (); 90 91 /* check with enough precision */ 92 mpfr_init2 (x, IEEE_DBL_MANT_DIG); 93 mpfr_init2 (y, IEEE_DBL_MANT_DIG); 94 mpfr_init2 (z, IEEE_DBL_MANT_DIG); 95 96 mpfr_set_str (y, "4096", 10, MPFR_RNDN); 97 d = 0.125; 98 mpfr_clear_flags (); 99 inexact = mpfr_mul_d (x, y, d, MPFR_RNDN); 100 if (inexact != 0) 101 { 102 printf ("Inexact flag error in mpfr_mul_d\n"); 103 exit (1); 104 } 105 mpfr_set_str (z, "512", 10, MPFR_RNDN); 106 if (mpfr_cmp (z, x)) 107 { 108 printf ("Error in mpfr_mul_d ("); 109 mpfr_out_str (stdout, 10, 0, y, MPFR_RNDN); 110 printf (" + %.20g)\nexpected ", d); 111 mpfr_out_str (stdout, 10, 0, z, MPFR_RNDN); 112 printf ("\ngot "); 113 mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN); 114 printf ("\n"); 115 exit (1); 116 } 117 mpfr_clears (x, y, z, (mpfr_ptr) 0); 118 119 check_nans (); 120 121 test_generic (2, 1000, 100); 122 123 tests_end_mpfr (); 124 return 0; 125 } 126 127 #else 128 129 int 130 main (void) 131 { 132 printf ("Warning! Test disabled for this MPFR version.\n"); 133 return 0; 134 } 135 136 #endif 137