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2bcb36b2 JM |
1 | /* Test that setjmp/longjmp do not save and restore floating-point |
2 | exceptions and rounding modes. | |
688903eb | 3 | Copyright (C) 2013-2018 Free Software Foundation, Inc. |
2bcb36b2 JM |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <fenv.h> | |
21 | #include <setjmp.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | ||
1ff950ad | 25 | static jmp_buf __attribute__ ((unused)) env; |
2bcb36b2 JM |
26 | static int result = 0; |
27 | ||
28 | #if defined FE_TONEAREST && defined FE_TOWARDZERO | |
29 | static int expected_rounding_mode = FE_TONEAREST; | |
30 | ||
31 | static void | |
32 | change_rounding_mode (void) | |
33 | { | |
34 | if (fesetround (FE_TOWARDZERO) == 0) | |
35 | expected_rounding_mode = FE_TOWARDZERO; | |
36 | else | |
37 | puts ("fesetround (FE_TOWARDZERO) failed, continuing test"); | |
38 | longjmp (env, 1); | |
39 | } | |
40 | #endif | |
41 | ||
42 | #ifdef FE_INVALID | |
43 | static int expected_exceptions = 0; | |
44 | ||
45 | static void | |
46 | raise_exception (void) | |
47 | { | |
48 | if (feraiseexcept (FE_INVALID) == 0) | |
49 | expected_exceptions = FE_INVALID; | |
50 | else | |
51 | puts ("feraiseexcept (FE_INVALID) failed, continuing test"); | |
52 | longjmp (env, 1); | |
53 | } | |
54 | #endif | |
55 | ||
56 | static int | |
57 | do_test (void) | |
58 | { | |
59 | #if defined FE_TONEAREST && defined FE_TOWARDZERO | |
60 | if (fesetround (FE_TONEAREST) == 0) | |
61 | { | |
62 | if (setjmp (env) == 0) | |
63 | change_rounding_mode (); | |
64 | else | |
65 | { | |
66 | if (fegetround () == expected_rounding_mode) | |
67 | puts ("PASS: longjmp preserved rounding mode"); | |
68 | else | |
69 | { | |
70 | puts ("FAIL: longjmp changed rounding mode"); | |
71 | result = 1; | |
72 | } | |
73 | } | |
74 | } | |
75 | else | |
76 | puts ("fesetround (FE_TONEAREST) failed, not testing rounding modes"); | |
77 | #else | |
78 | puts ("rounding mode test not supported"); | |
79 | #endif | |
80 | #ifdef FE_INVALID | |
81 | if (feclearexcept (FE_ALL_EXCEPT) == 0) | |
82 | { | |
83 | if (setjmp (env) == 0) | |
84 | raise_exception (); | |
85 | else | |
86 | { | |
87 | if (fetestexcept (FE_INVALID) == expected_exceptions) | |
88 | puts ("PASS: longjmp preserved exceptions"); | |
89 | else | |
90 | { | |
91 | puts ("FAIL: longjmp changed exceptions"); | |
92 | result = 1; | |
93 | } | |
94 | } | |
95 | } | |
96 | else | |
97 | puts ("feclearexcept (FE_ALL_EXCEPT) failed, not testing exceptions"); | |
98 | #else | |
99 | puts ("exception test not supported"); | |
100 | #endif | |
101 | return result; | |
102 | } | |
103 | ||
104 | #define TEST_FUNCTION do_test () | |
105 | #include "../test-skeleton.c" |