1 /* Test file for mpfr_add_ui 2 3 Copyright 2000-2016 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 /* checks that x+y gives the right results with 53 bits of precision */ 30 static void 31 check3 (const char *xs, unsigned long y, mpfr_rnd_t rnd_mode, const char *zs) 32 { 33 mpfr_t xx, zz; 34 35 mpfr_inits2 (53, xx, zz, (mpfr_ptr) 0); 36 mpfr_set_str1 (xx, xs); 37 mpfr_add_ui (zz, xx, y, rnd_mode); 38 if (mpfr_cmp_str1(zz, zs) ) 39 { 40 printf ("expected sum is %s, got ",zs); 41 mpfr_out_str(stdout, 10, 0, zz, MPFR_RNDN); 42 printf ("\nmpfr_add_ui failed for x=%s y=%lu with rnd_mode=%s\n", 43 xs, y, mpfr_print_rnd_mode(rnd_mode)); 44 exit (1); 45 } 46 mpfr_clears (xx, zz, (mpfr_ptr) 0); 47 } 48 49 static void 50 special (void) 51 { 52 mpfr_t x, y; 53 54 mpfr_init2 (x, 63); 55 mpfr_init2 (y, 63); 56 mpfr_set_str_binary (x, "0.110100000000000001110001110010111111000000000101100011100100011"); 57 mpfr_add_ui (y, x, 1, MPFR_RNDD); 58 mpfr_clear (x); 59 mpfr_clear (y); 60 } 61 62 static void 63 check_nans (void) 64 { 65 mpfr_t x, y; 66 67 mpfr_init2 (x, 123L); 68 mpfr_init2 (y, 123L); 69 70 /* nan + 2394875 == nan */ 71 mpfr_set_nan (x); 72 mpfr_clear_nanflag (); 73 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 74 MPFR_ASSERTN (mpfr_nanflag_p ()); 75 MPFR_ASSERTN (mpfr_nan_p (y)); 76 77 /* +inf + 2394875 == +inf */ 78 mpfr_set_inf (x, 1); 79 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 80 MPFR_ASSERTN (mpfr_inf_p (y)); 81 MPFR_ASSERTN (mpfr_sgn (y) > 0); 82 83 /* -inf + 2394875 == -inf */ 84 mpfr_set_inf (x, -1); 85 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 86 MPFR_ASSERTN (mpfr_inf_p (y)); 87 MPFR_ASSERTN (mpfr_sgn (y) < 0); 88 89 mpfr_clear (x); 90 mpfr_clear (y); 91 } 92 93 #define TEST_FUNCTION mpfr_add_ui 94 #define ULONG_ARG2 95 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS) 96 #include "tgeneric.c" 97 98 int 99 main (int argc, char *argv[]) 100 { 101 tests_start_mpfr (); 102 103 check_nans (); 104 105 special (); 106 check3 ("-1.716113812768534e-140", 1271212614, MPFR_RNDZ, 107 "1.27121261399999976e9"); 108 check3 ("1.22191250737771397120e+20", 948002822, MPFR_RNDN, 109 "122191250738719408128.0"); 110 check3 ("-6.72658901114033715233e-165", 2000878121, MPFR_RNDZ, 111 "2.0008781209999997615e9"); 112 check3 ("-2.0769715792901673e-5", 880524, MPFR_RNDN, 113 "8.8052399997923023e5"); 114 115 test_generic (2, 1000, 100); 116 117 tests_end_mpfr (); 118 return 0; 119 } 120