1 /* Test file for mpfr_add_ui 2 3 Copyright 2000-2023 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 https://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 <float.h> 24 25 #include "mpfr-test.h" 26 27 /* checks that x+y gives the right results with 53 bits of precision */ 28 static void 29 check3 (const char *xs, unsigned long y, mpfr_rnd_t rnd_mode, const char *zs) 30 { 31 mpfr_t xx, zz; 32 33 mpfr_inits2 (53, xx, zz, (mpfr_ptr) 0); 34 mpfr_set_str1 (xx, xs); 35 mpfr_add_ui (zz, xx, y, rnd_mode); 36 if (mpfr_cmp_str1(zz, zs) ) 37 { 38 printf ("expected sum is %s, got ",zs); 39 mpfr_out_str(stdout, 10, 0, zz, MPFR_RNDN); 40 printf ("\nmpfr_add_ui failed for x=%s y=%lu with rnd_mode=%s\n", 41 xs, y, mpfr_print_rnd_mode(rnd_mode)); 42 exit (1); 43 } 44 mpfr_clears (xx, zz, (mpfr_ptr) 0); 45 } 46 47 static void 48 special (void) 49 { 50 mpfr_t x, y; 51 52 mpfr_init2 (x, 63); 53 mpfr_init2 (y, 63); 54 mpfr_set_str_binary (x, "0.110100000000000001110001110010111111000000000101100011100100011"); 55 mpfr_add_ui (y, x, 1, MPFR_RNDD); 56 mpfr_clear (x); 57 mpfr_clear (y); 58 } 59 60 static void 61 check_nans (void) 62 { 63 mpfr_t x, y; 64 65 mpfr_init2 (x, 123L); 66 mpfr_init2 (y, 123L); 67 68 /* nan + 2394875 == nan */ 69 mpfr_set_nan (x); 70 mpfr_clear_nanflag (); 71 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 72 MPFR_ASSERTN (mpfr_nanflag_p ()); 73 MPFR_ASSERTN (mpfr_nan_p (y)); 74 75 /* +inf + 2394875 == +inf */ 76 mpfr_set_inf (x, 1); 77 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 78 MPFR_ASSERTN (mpfr_inf_p (y)); 79 MPFR_ASSERTN (mpfr_sgn (y) > 0); 80 81 /* -inf + 2394875 == -inf */ 82 mpfr_set_inf (x, -1); 83 mpfr_add_ui (y, x, 2394875L, MPFR_RNDN); 84 MPFR_ASSERTN (mpfr_inf_p (y)); 85 MPFR_ASSERTN (mpfr_sgn (y) < 0); 86 87 mpfr_clear (x); 88 mpfr_clear (y); 89 } 90 91 #define TEST_FUNCTION mpfr_add_ui 92 #define ULONG_ARG2 93 #define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS) 94 #include "tgeneric.c" 95 96 int 97 main (int argc, char *argv[]) 98 { 99 tests_start_mpfr (); 100 101 check_nans (); 102 103 special (); 104 check3 ("-1.716113812768534e-140", 1271212614, MPFR_RNDZ, 105 "1.27121261399999976e9"); 106 check3 ("1.22191250737771397120e+20", 948002822, MPFR_RNDN, 107 "122191250738719408128.0"); 108 check3 ("-6.72658901114033715233e-165", 2000878121, MPFR_RNDZ, 109 "2.0008781209999997615e9"); 110 check3 ("-2.0769715792901673e-5", 880524, MPFR_RNDN, 111 "8.8052399997923023e5"); 112 113 test_generic (MPFR_PREC_MIN, 1000, 100); 114 115 tests_end_mpfr (); 116 return 0; 117 } 118