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
check3(const char * xs,unsigned long y,mpfr_rnd_t rnd_mode,const char * zs)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
special(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
check_nans(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
main(int argc,char * argv[])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