1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* Copyright (C) 2014-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <sys/prctl.h>
#if __mips_fpr != 0 || _MIPS_SPFPSET != 16
# error This test requires -mfpxx -mno-odd-spreg
#endif
/* This test verifies that mode changes do not clobber register state
in other threads. */
static volatile int finished;
static int mode[6] =
{
0,
PR_FP_MODE_FR,
PR_FP_MODE_FR | PR_FP_MODE_FRE,
PR_FP_MODE_FR,
0,
PR_FP_MODE_FR | PR_FP_MODE_FRE
};
static void *
thread_function (void * arg __attribute__ ((unused)))
{
volatile int i = 0;
volatile float f = 0.0;
volatile double d = 0.0;
while (!finished)
{
if ((float) i != f || (double) i != d)
{
printf ("unexpected value: i(%d) f(%f) d(%f)\n", i, f, d);
exit (1);
}
if (i == 100)
{
i = 0;
f = 0.0;
d = 0.0;
}
i++;
f++;
d++;
}
return NULL;
}
static int
do_test (void)
{
int count = sysconf (_SC_NPROCESSORS_ONLN);
if (count <= 0)
count = 1;
count *= 4;
pthread_t th[count];
int i;
int result = 0;
for (i = 0; i < count; ++i)
if (pthread_create (&th[i], NULL, thread_function, 0) != 0)
{
printf ("creation of thread %d failed\n", i);
exit (1);
}
for (i = 0 ; i < 1000000 ; i++)
{
if (prctl (PR_SET_FP_MODE, mode[i % 6]) != 0
&& errno != ENOTSUP)
{
printf ("prctl PR_SET_FP_MODE failed: %m\n");
exit (1);
}
}
finished = 1;
for (i = 0; i < count; ++i)
{
void *v;
if (pthread_join (th[i], &v) != 0)
{
printf ("join of thread %d failed\n", i);
result = 1;
}
else if (v != NULL)
{
printf ("join %d successful, but child failed\n", i);
result = 1;
}
else
printf ("join %d successful\n", i);
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../../test-skeleton.c"
|
