1 /* $NetBSD: t_fpu.c,v 1.2 2013/01/27 14:47:37 mbalmer Exp $ */ 2 3 /* 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __COPYRIGHT("@(#) Copyright (c) 2008\ 31 The NetBSD Foundation, inc. All rights reserved."); 32 __RCSID("$NetBSD: t_fpu.c,v 1.2 2013/01/27 14:47:37 mbalmer Exp $"); 33 34 /* 35 * This is adapted from part of csw/cstest of the MPD implementation by 36 * the University of Arizona CS department (http://www.cs.arizona.edu/sr/) 37 * which is in the public domain: 38 * 39 * "The MPD system is in the public domain and you may use and distribute it 40 * as you wish. We ask that you retain credits referencing the University 41 * of Arizona and that you identify any changes you make. 42 * 43 * We can't provide a warranty with MPD; it's up to you to determine its 44 * suitability and reliability for your needs. We would like to hear of 45 * any problems you encounter but we cannot promise a timely correction." 46 * 47 * It was changed to use pthread_create() and sched_yield() instead of 48 * the internal MPD context switching primitives by Ignatios Souvatzis 49 * <is@netbsd.org>. 50 */ 51 52 #include <math.h> 53 #include <pthread.h> 54 #include <sched.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <unistd.h> 58 59 #include <atf-c.h> 60 61 #ifdef __FreeBSD__ 62 #include <errno.h> 63 #include <string.h> 64 #endif 65 66 #include "h_common.h" 67 68 #define N_RECURSE 10 69 70 static void recurse(void); 71 72 int recursion_depth = 0; 73 pthread_mutex_t recursion_depth_lock; 74 75 static void * 76 stir(void *p) 77 { 78 double *q = (double *)p; 79 double x = *q++; 80 double y = *q++; 81 double z = *q++; 82 83 for (;;) { 84 x = sin ((y = cos (x + y + .4)) - (z = cos (x + z + .6))); 85 #ifdef __FreeBSD__ 86 ATF_REQUIRE_MSG(sched_yield() == 0, 87 "sched_yield failed: %s", strerror(errno)); 88 #else 89 PTHREAD_REQUIRE(sched_yield()); 90 #endif 91 } 92 } 93 94 static double 95 mul3(double x, double y, double z) 96 { 97 #ifdef __FreeBSD__ 98 ATF_REQUIRE_MSG(sched_yield() == 0, 99 "sched_yield failed: %s", strerror(errno)); 100 #else 101 PTHREAD_REQUIRE(sched_yield()); 102 #endif 103 104 return x * y * z; 105 } 106 107 static void * 108 bar(void *p) 109 { 110 double d; 111 int rc; 112 113 d = mul3(mul3(2., 3., 5.), mul3(7., 11., 13.), mul3(17., 19., 23.)); 114 ATF_REQUIRE_EQ(d, 223092870.); 115 116 PTHREAD_REQUIRE(pthread_mutex_lock(&recursion_depth_lock)); 117 rc = recursion_depth++; 118 PTHREAD_REQUIRE(pthread_mutex_unlock(&recursion_depth_lock)); 119 120 if (rc < N_RECURSE) 121 recurse(); 122 else 123 atf_tc_pass(); 124 125 /* NOTREACHED */ 126 return NULL; 127 } 128 129 static void 130 recurse(void) { 131 pthread_t s2; 132 #ifdef __FreeBSD__ 133 PTHREAD_REQUIRE(pthread_create(&s2, 0, bar, 0)); 134 #else 135 pthread_create(&s2, 0, bar, 0); 136 #endif 137 sleep(20); /* XXX must be long enough for our slowest machine */ 138 } 139 140 ATF_TC(fpu); 141 ATF_TC_HEAD(fpu, tc) 142 { 143 atf_tc_set_md_var(tc, "descr", 144 "Checks that thread context switches will leave the " 145 "floating point computations unharmed"); 146 } 147 ATF_TC_BODY(fpu, tc) 148 { 149 double stirseed[] = { 1.7, 3.2, 2.4 }; 150 pthread_t s5; 151 152 printf("Testing threaded floating point computations...\n"); 153 154 PTHREAD_REQUIRE(pthread_mutex_init(&recursion_depth_lock, 0)); 155 156 #ifdef __FreeBSD__ 157 PTHREAD_REQUIRE(pthread_create(&s5, 0, stir, stirseed)); 158 #else 159 pthread_create(&s5, 0, stir, stirseed); 160 #endif 161 recurse(); 162 163 atf_tc_fail("exiting from main"); 164 } 165 166 ATF_TP_ADD_TCS(tp) 167 { 168 ATF_TP_ADD_TC(tp, fpu); 169 170 return atf_no_error(); 171 } 172