1 | /* Test for the C++ implementation of issignaling. |
2 | Copyright (C) 2017-2022 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 (format: "%s:%d: error: %s\n" , __FILE__, line, actual_expr); |
41 | printf (format: "%s:%d: expected: %d\n" , __FILE__, line, expected); |
42 | printf (format: "%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> |
114 | |