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/* Copyright (C) 2014 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;
}
int
main (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;
}
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