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2b778ceb | 1 | /* Copyright (C) 2014-2021 Free Software Foundation, Inc. |
0bd95672 MF |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
0bd95672 MF |
17 | |
18 | #include <errno.h> | |
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | #include <limits.h> | |
25 | #include <sys/prctl.h> | |
26 | ||
27 | #if __mips_fpr != 0 || _MIPS_SPFPSET != 16 | |
28 | # error This test requires -mfpxx -mno-odd-spreg | |
29 | #endif | |
30 | ||
31 | /* This test verifies that mode changes do not clobber register state | |
32 | in other threads. */ | |
33 | ||
34 | static volatile int finished; | |
35 | static int mode[6] = | |
36 | { | |
37 | 0, | |
38 | PR_FP_MODE_FR, | |
39 | PR_FP_MODE_FR | PR_FP_MODE_FRE, | |
40 | PR_FP_MODE_FR, | |
41 | 0, | |
42 | PR_FP_MODE_FR | PR_FP_MODE_FRE | |
43 | }; | |
44 | ||
45 | static void * | |
46 | thread_function (void * arg __attribute__ ((unused))) | |
47 | { | |
48 | volatile int i = 0; | |
49 | volatile float f = 0.0; | |
50 | volatile double d = 0.0; | |
51 | ||
52 | while (!finished) | |
53 | { | |
54 | if ((float) i != f || (double) i != d) | |
55 | { | |
56 | printf ("unexpected value: i(%d) f(%f) d(%f)\n", i, f, d); | |
57 | exit (1); | |
58 | } | |
59 | ||
60 | if (i == 100) | |
61 | { | |
62 | i = 0; | |
63 | f = 0.0; | |
64 | d = 0.0; | |
65 | } | |
66 | ||
67 | i++; | |
68 | f++; | |
69 | d++; | |
70 | } | |
71 | return NULL; | |
72 | } | |
73 | ||
0cdaef4d AJ |
74 | static int |
75 | do_test (void) | |
0bd95672 MF |
76 | { |
77 | int count = sysconf (_SC_NPROCESSORS_ONLN); | |
78 | if (count <= 0) | |
79 | count = 1; | |
80 | count *= 4; | |
81 | ||
82 | pthread_t th[count]; | |
83 | int i; | |
84 | int result = 0; | |
85 | ||
86 | for (i = 0; i < count; ++i) | |
87 | if (pthread_create (&th[i], NULL, thread_function, 0) != 0) | |
88 | { | |
89 | printf ("creation of thread %d failed\n", i); | |
90 | exit (1); | |
91 | } | |
92 | ||
93 | for (i = 0 ; i < 1000000 ; i++) | |
94 | { | |
95 | if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0 | |
96 | && errno != ENOTSUP) | |
97 | { | |
98 | printf ("prctl PR_SET_FP_MODE failed: %m\n"); | |
99 | exit (1); | |
100 | } | |
101 | } | |
102 | ||
103 | finished = 1; | |
104 | ||
105 | for (i = 0; i < count; ++i) | |
106 | { | |
107 | void *v; | |
108 | if (pthread_join (th[i], &v) != 0) | |
109 | { | |
110 | printf ("join of thread %d failed\n", i); | |
111 | result = 1; | |
112 | } | |
113 | else if (v != NULL) | |
114 | { | |
115 | printf ("join %d successful, but child failed\n", i); | |
116 | result = 1; | |
117 | } | |
118 | else | |
119 | printf ("join %d successful\n", i); | |
120 | } | |
121 | ||
122 | return result; | |
123 | } | |
0cdaef4d AJ |
124 | |
125 | #define TEST_FUNCTION do_test () | |
126 | #include "../../test-skeleton.c" |