| /* Copyright (C) 2014-2018 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" |