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  1. /*
  2.  * Copyright (c) 2005 Jakub Vana
  3.  * Copyright (c) 2005 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - 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.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. #include <print.h>
  31. #include <debug.h>
  32.  
  33. #include <test.h>
  34. #include <atomic.h>
  35. #include <proc/thread.h>
  36.  
  37. #include <arch.h>
  38. #include <arch/arch.h>
  39.  
  40.  
  41. #define THREADS   150
  42. #define ATTEMPTS  100
  43.  
  44. #define E_10e8   271828182
  45. #define PI_10e8  3141592
  46.  
  47. static inline long double sqrt(long double a)
  48. {
  49.     long double x = 1;
  50.     long double lx = 0;
  51.    
  52.     if (a < 0.00000000000000001)
  53.         return 0;
  54.        
  55.     while (x != lx) {
  56.         lx = x;
  57.         x = (x + (a / x)) / 2;
  58.     }
  59.    
  60.     return x;
  61. }
  62.  
  63. static atomic_t threads_ok;
  64. static atomic_t threads_fault;
  65. static waitq_t can_start;
  66. static bool sh_quiet;
  67.  
  68. static void e(void *data)
  69. {
  70.     int i;
  71.     double e, d, le, f;
  72.    
  73.     thread_detach(THREAD);
  74.    
  75.     waitq_sleep(&can_start);
  76.    
  77.     for (i = 0; i<ATTEMPTS; i++) {
  78.         le = -1;
  79.         e = 0;
  80.         f = 1;
  81.        
  82.         for (d = 1; e != le; d *= f, f += 1) {
  83.             le = e;
  84.             e = e + 1 / d;
  85.         }
  86.        
  87.         if ((int) (100000000 * e) != E_10e8) {
  88.             if (!sh_quiet)
  89.                 printf("tid%" PRIu64 ": e*10e8=%zd should be %" PRIun "\n", THREAD->tid, (unative_t) (100000000 * e), (unative_t) E_10e8);
  90.             atomic_inc(&threads_fault);
  91.             break;
  92.         }
  93.     }
  94.     atomic_inc(&threads_ok);
  95. }
  96.  
  97. static void pi(void *data)
  98. {
  99.     int i;
  100.     double lpi, pi;
  101.     double n, ab, ad;
  102.    
  103.     thread_detach(THREAD);
  104.    
  105.     waitq_sleep(&can_start);
  106.    
  107.     for (i = 0; i < ATTEMPTS; i++) {
  108.         lpi = -1;
  109.         pi = 0;
  110.        
  111.         for (n = 2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {
  112.             double sc, cd;
  113.            
  114.             sc = sqrt(1 - (ab * ab / 4));
  115.             cd = 1 - sc;
  116.             ad = sqrt(ab * ab / 4 + cd * cd);
  117.             lpi = pi;
  118.             pi = 2 * n * ad;
  119.         }
  120.        
  121.         if ((int) (1000000 * pi) != PI_10e8) {
  122.             if (!sh_quiet)
  123.                 printf("tid%" PRIu64 ": pi*10e8=%zd should be %" PRIun "\n", THREAD->tid, (unative_t) (1000000 * pi), (unative_t) (PI_10e8 / 100));
  124.             atomic_inc(&threads_fault);
  125.             break;
  126.         }
  127.     }
  128.     atomic_inc(&threads_ok);
  129. }
  130.  
  131. char * test_fpu1(bool quiet)
  132. {
  133.     unsigned int i, total = 0;
  134.     sh_quiet = quiet;
  135.    
  136.     waitq_initialize(&can_start);
  137.     atomic_set(&threads_ok, 0);
  138.     atomic_set(&threads_fault, 0);
  139.    
  140.     if (!quiet)
  141.         printf("Creating %u threads... ", 2 * THREADS);
  142.    
  143.     for (i = 0; i < THREADS; i++) {  
  144.         thread_t *t;
  145.        
  146.         if (!(t = thread_create(e, NULL, TASK, 0, "e", false))) {
  147.             if (!quiet)
  148.                 printf("could not create thread %u\n", 2 * i);
  149.             break;
  150.         }
  151.         thread_ready(t);
  152.         total++;
  153.        
  154.         if (!(t = thread_create(pi, NULL, TASK, 0, "pi", false))) {
  155.             if (!quiet)
  156.                 printf("could not create thread %u\n", 2 * i + 1);
  157.             break;
  158.         }
  159.         thread_ready(t);
  160.         total++;
  161.     }
  162.    
  163.     if (!quiet)
  164.         printf("ok\n");
  165.    
  166.     thread_sleep(1);
  167.     waitq_wakeup(&can_start, WAKEUP_ALL);
  168.    
  169.     while (atomic_get(&threads_ok) != (long) total) {
  170.         if (!quiet)
  171.             printf("Threads left: %d\n", total - atomic_get(&threads_ok));
  172.         thread_sleep(1);
  173.     }
  174.    
  175.     if (atomic_get(&threads_fault) == 0)
  176.         return NULL;
  177.    
  178.     return "Test failed";
  179. }
  180.