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1 | /* Test for the C++ implementation of issignaling. | |
2 | Copyright (C) 2017-2024 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #define _GNU_SOURCE 1 | |
20 | #include <math.h> | |
21 | #include <stdio.h> | |
22 | ||
23 | #include <limits> | |
24 | ||
25 | /* There is no signaling_NaN for _Float128 in std::numeric_limits. | |
26 | Include ieee754_float128.h and use the bitfields in the union | |
27 | ieee854_float128.ieee_nan to build a signaling NaN. */ | |
28 | #if __HAVE_DISTINCT_FLOAT128 | |
29 | # include <ieee754_float128.h> | |
30 | #endif | |
31 | ||
32 | static bool errors; | |
33 | ||
34 | static void | |
35 | check (int actual, int expected, const char *actual_expr, int line) | |
36 | { | |
37 | if (actual != expected) | |
38 | { | |
39 | errors = true; | |
40 | printf ("%s:%d: error: %s\n", __FILE__, line, actual_expr); | |
41 | printf ("%s:%d: expected: %d\n", __FILE__, line, expected); | |
42 | printf ("%s:%d: actual: %d\n", __FILE__, line, actual); | |
43 | } | |
44 | } | |
45 | ||
46 | #define CHECK(actual, expected) \ | |
47 | check ((actual), (expected), #actual, __LINE__) | |
48 | ||
49 | template <class T> | |
50 | static void | |
51 | check_type () | |
52 | { | |
53 | typedef std::numeric_limits<T> limits; | |
54 | CHECK (issignaling (T{0}), 0); | |
55 | if (limits::has_infinity) | |
56 | { | |
57 | CHECK (issignaling (limits::infinity ()), 0); | |
58 | CHECK (issignaling (-limits::infinity ()), 0); | |
59 | } | |
60 | if (limits::has_quiet_NaN) | |
61 | CHECK (issignaling (limits::quiet_NaN ()), 0); | |
62 | if (limits::has_signaling_NaN) | |
63 | CHECK (issignaling (limits::signaling_NaN ()), 1); | |
64 | } | |
65 | ||
66 | #if __HAVE_DISTINCT_FLOAT128 | |
67 | static void | |
68 | check_float128 () | |
69 | { | |
70 | ieee854_float128 q; | |
71 | ||
72 | q.d = 0; | |
73 | CHECK (issignaling (q.d), 0); | |
74 | ||
75 | /* Infinity. */ | |
76 | q.ieee.negative = 0; | |
77 | q.ieee.exponent = 0x7FFF; | |
78 | q.ieee.mantissa0 = 0x0000; | |
79 | q.ieee.mantissa1 = 0x00000000; | |
80 | q.ieee.mantissa2 = 0x00000000; | |
81 | q.ieee.mantissa3 = 0x00000000; | |
82 | CHECK (issignaling (q.d), 0); | |
83 | ||
84 | /* Quiet NaN. */ | |
85 | q.ieee_nan.quiet_nan = 1; | |
86 | q.ieee_nan.mantissa0 = 0x0000; | |
87 | CHECK (issignaling (q.d), 0); | |
88 | ||
89 | /* Still a quiet NaN. */ | |
90 | q.ieee_nan.quiet_nan = 1; | |
91 | q.ieee_nan.mantissa0 = 0x4000; | |
92 | CHECK (issignaling (q.d), 0); | |
93 | ||
94 | /* Signaling NaN. */ | |
95 | q.ieee_nan.quiet_nan = 0; | |
96 | q.ieee_nan.mantissa0 = 0x4000; | |
97 | CHECK (issignaling (q.d), 1); | |
98 | } | |
99 | #endif | |
100 | ||
101 | static int | |
102 | do_test (void) | |
103 | { | |
104 | check_type<float> (); | |
105 | check_type<double> (); | |
106 | check_type<long double> (); | |
107 | #if __HAVE_DISTINCT_FLOAT128 | |
108 | check_float128 (); | |
109 | #endif | |
110 | return errors; | |
111 | } | |
112 | ||
113 | #include <support/test-driver.c> |