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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. #include <panic.h>
  33.  
  34. #include <test.h>
  35. #include <arch/atomic.h>
  36. #include <proc/thread.h>
  37.  
  38. #include <arch.h>
  39.  
  40. #define THREADS     150*2
  41. #define ATTEMPTS    100
  42.  
  43. #define E_10e8  271828182
  44. #define PI_10e8 314159265
  45.  
  46. static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }
  47.  
  48. static volatile int threads_ok;
  49. static waitq_t can_start;
  50.  
  51. static void e(void *data)
  52. {
  53.     int i;
  54.     double e,d,le,f;
  55.  
  56.     waitq_sleep(&can_start);
  57.  
  58.     for (i = 0; i<ATTEMPTS; i++) {
  59.         le=-1;
  60.         e=0;
  61.         f=1;
  62.  
  63.         for(d=1;e!=le;d*=f,f+=1) {
  64.             le=e;
  65.             e=e+1/d;
  66.         }
  67.  
  68.         if((int)(100000000*e)!=E_10e8)
  69.             panic("tid%d: e*10e8=%d\n", THREAD->tid, (int) 100000000*e);
  70.     }
  71.  
  72.     atomic_inc(&threads_ok);
  73. }
  74.  
  75. static void pi(void *data)
  76. {
  77.     int i;
  78.     double lpi, pi;
  79.     double n, ab, ad;
  80.  
  81.     waitq_sleep(&can_start);
  82.  
  83.  
  84.     for (i = 0; i<ATTEMPTS; i++) {
  85.         lpi = -1;
  86.         pi = 0;
  87.  
  88.         for (n=2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {
  89.             double sc, cd;
  90.  
  91.             sc = sqrt(1 - (ab*ab/4));
  92.             cd = 1 - sc;
  93.             ad = sqrt(ab*ab/4 + cd*cd);
  94.             lpi = pi;
  95.             pi = 2 * n * ad;
  96.         }
  97.  
  98.         if((int)(100000000*pi)!=PI_10e8)
  99.             panic("tid%d: pi*10e8=%d\n", THREAD->tid, (int) 100000000*pi);
  100.     }
  101.  
  102.     atomic_inc(&threads_ok);
  103. }
  104.  
  105.  
  106. void test(void)
  107. {
  108.     thread_t *t;
  109.     int i;
  110.  
  111.     waitq_initialize(&can_start);
  112.  
  113.     printf("FPU test #1\n");
  114.     printf("Creating %d threads... ", THREADS);
  115.  
  116.     for (i=0; i<THREADS/2; i++) {  
  117.         if (!(t = thread_create(e, NULL, TASK, 0)))
  118.             panic("could not create thread\n");
  119.         thread_ready(t);
  120.         if (!(t = thread_create(pi, NULL, TASK, 0)))
  121.             panic("could not create thread\n");
  122.         thread_ready(t);
  123.     }
  124.     printf("ok\n");
  125.    
  126.     thread_sleep(1);
  127.     waitq_wakeup(&can_start, WAKEUP_ALL);
  128.  
  129.     while (threads_ok != THREADS)
  130.         ;
  131.        
  132.     printf("Test passed.\n");
  133. }
  134.