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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. #if (defined(ia32) || defined(amd64) || defined(ia64) || defined(ia32xen))
  31.  
  32. #include <print.h>
  33. #include <debug.h>
  34.  
  35. #include <test.h>
  36. #include <atomic.h>
  37. #include <proc/thread.h>
  38.  
  39. #include <arch.h>
  40. #include <arch/arch.h>
  41.  
  42.  
  43. #define THREADS     150
  44. #define ATTEMPTS    100
  45.  
  46. #define E_10e8  271828182
  47. #define PI_10e8 314159265
  48.  
  49.  
  50. #ifdef KERN_ia32_ARCH_H_
  51. static inline double sqrt(double x)
  52. {
  53.     double v;
  54.    
  55.     asm (
  56.         "fsqrt\n"
  57.         : "=t" (v)
  58.         : "0" (x)
  59.     );
  60.    
  61.     return v;
  62. }
  63. #endif
  64.  
  65. #ifdef KERN_amd64_ARCH_H_
  66. static inline double sqrt(double x)
  67. {
  68.     double v;
  69.    
  70.     asm (
  71.         "fsqrt\n"
  72.         : "=t" (v)
  73.         : "0" (x)
  74.     );
  75.    
  76.     return v;
  77. }
  78. #endif
  79.  
  80. #ifdef KERN_ia64_ARCH_H_
  81.  
  82. #undef PI_10e8 
  83. #define PI_10e8 3141592
  84.  
  85. static inline long double sqrt(long double a)
  86. {  
  87.     long double x = 1;
  88.     long double lx = 0;
  89.  
  90.     if (a < 0.00000000000000001)
  91.         return 0;
  92.        
  93.     while(x != lx) {
  94.         lx = x;
  95.         x = (x + (a / x)) / 2;
  96.     }
  97.    
  98.     return x;
  99. }
  100. #endif
  101.  
  102.  
  103. static atomic_t threads_ok;
  104. static atomic_t threads_fault;
  105. static waitq_t can_start;
  106. static bool sh_quiet;
  107.  
  108. static void e(void *data)
  109. {
  110.     int i;
  111.     double e, d, le, f;
  112.  
  113.     thread_detach(THREAD);
  114.  
  115.     waitq_sleep(&can_start);
  116.  
  117.     for (i = 0; i<ATTEMPTS; i++) {
  118.         le = -1;
  119.         e = 0;
  120.         f = 1;
  121.  
  122.         for (d = 1; e != le; d *= f, f += 1) {
  123.             le = e;
  124.             e = e + 1 / d;
  125.         }
  126.  
  127.         if ((int) (100000000 * e) != E_10e8) {
  128.             if (!sh_quiet)
  129.                 printf("tid%d: e*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000 * e), (unative_t) E_10e8);
  130.             atomic_inc(&threads_fault);
  131.             break;
  132.         }
  133.     }
  134.     atomic_inc(&threads_ok);
  135. }
  136.  
  137. static void pi(void *data)
  138. {
  139.     int i;
  140.     double lpi, pi;
  141.     double n, ab, ad;
  142.    
  143.     thread_detach(THREAD);
  144.  
  145.     waitq_sleep(&can_start);
  146.  
  147.     for (i = 0; i < ATTEMPTS; i++) {
  148.         lpi = -1;
  149.         pi = 0;
  150.  
  151.         for (n = 2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {
  152.             double sc, cd;
  153.  
  154.             sc = sqrt(1 - (ab * ab / 4));
  155.             cd = 1 - sc;
  156.             ad = sqrt(ab * ab / 4 + cd * cd);
  157.             lpi = pi;
  158.             pi = 2 * n * ad;
  159.         }
  160.  
  161. #ifdef KERN_ia64_ARCH_H_
  162.         if ((int) (1000000 * pi) != PI_10e8) {
  163.             if (!sh_quiet)
  164.                 printf("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (1000000 * pi), (unative_t) (PI_10e8 / 100));
  165.             atomic_inc(&threads_fault);
  166.             break;
  167.         }
  168. #else
  169.         if ((int) (100000000 * pi) != PI_10e8) {
  170.             if (!sh_quiet)
  171.                 printf("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000 * pi), (unative_t) PI_10e8);
  172.             atomic_inc(&threads_fault);
  173.             break;
  174.         }
  175. #endif
  176.     }
  177.     atomic_inc(&threads_ok);
  178. }
  179.  
  180. char * test_fpu1(bool quiet)
  181. {
  182.     unsigned int i, total = 0;
  183.     sh_quiet = quiet;
  184.  
  185.     waitq_initialize(&can_start);
  186.     atomic_set(&threads_ok, 0);
  187.     atomic_set(&threads_fault, 0);
  188.    
  189.     if (!quiet)
  190.         printf("Creating %d threads... ", 2 * THREADS);
  191.  
  192.     for (i = 0; i < THREADS; i++) {  
  193.         thread_t *t;
  194.        
  195.         if (!(t = thread_create(e, NULL, TASK, 0, "e", false))) {
  196.             if (!quiet)
  197.                 printf("could not create thread %d\n", 2 * i);
  198.             break;
  199.         }
  200.         thread_ready(t);
  201.         total++;
  202.        
  203.         if (!(t = thread_create(pi, NULL, TASK, 0, "pi", false))) {
  204.             if (!quiet)
  205.                 printf("could not create thread %d\n", 2 * i + 1);
  206.             break;
  207.         }
  208.         thread_ready(t);
  209.         total++;
  210.     }
  211.    
  212.     if (!quiet)
  213.         printf("ok\n");
  214.    
  215.     thread_sleep(1);
  216.     waitq_wakeup(&can_start, WAKEUP_ALL);
  217.    
  218.     while (atomic_get(&threads_ok) != total) {
  219.         if (!quiet)
  220.             printf("Threads left: %d\n", total - atomic_get(&threads_ok));
  221.         thread_sleep(1);
  222.     }
  223.    
  224.     if (atomic_get(&threads_fault) == 0)
  225.         return NULL;
  226.    
  227.     return "Test failed";
  228. }
  229.  
  230. #endif
  231.