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1/* Test that setjmp/longjmp do not save and restore floating-point
2 exceptions and rounding modes.
3 Copyright (C) 2013-2019 Free Software Foundation, Inc.
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
25static jmp_buf __attribute__ ((unused)) env;
26static int result = 0;
27
28#if defined FE_TONEAREST && defined FE_TOWARDZERO
29static int expected_rounding_mode = FE_TONEAREST;
30
31static void
32change_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
43static int expected_exceptions = 0;
44
45static void
46raise_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
56static int
57do_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"
106

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