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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 <arch/interrupt.h>
  31. #include <print.h>
  32. #include <debug.h>
  33. #include <panic.h>
  34. #include <arch/i8259.h>
  35. #include <func.h>
  36. #include <cpu.h>
  37. #include <arch/asm.h>
  38. #include <mm/tlb.h>
  39.  
  40. #include <test.h>
  41. #include <arch.h>
  42. #include <arch/smp/atomic.h>
  43. #include <proc/thread.h>
  44.  
  45. #define THREADS     150*2
  46. #define ATTEMPTS    10
  47.  
  48. #define E_10e8  271828182
  49. #define PI_10e8 314159265
  50.  
  51. static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }
  52.  
  53. static volatile int threads_ok;
  54. static waitq_t can_start;
  55.  
  56. static void e(void *data)
  57. {
  58.     int i;
  59.     double e,d,le,f;
  60.  
  61.     waitq_sleep(&can_start);
  62.  
  63.     for (i = 0; i<ATTEMPTS; i++) {
  64.         le=-1;
  65.         e=0;
  66.         f=1;
  67.  
  68.         for(d=1;e!=le;d*=f,f+=1) {
  69.             le=e;
  70.             e=e+1/d;
  71.         }
  72.  
  73.         if((int)(100000000*e)!=E_10e8)
  74.             panic("tid%d: e*10e8=%d\n", THREAD->tid, (int) 100000000*e);
  75.     }
  76.  
  77.     atomic_inc((int *) &threads_ok);
  78. }
  79.  
  80. static void pi(void *data)
  81. {
  82.     int i;
  83.         double lpi, pi;
  84.         double n, ab, ad;
  85.  
  86.     waitq_sleep(&can_start);
  87.  
  88.  
  89.     for (i = 0; i<ATTEMPTS; i++) {
  90.         lpi = -1;
  91.         pi = 0;
  92.  
  93.             for (n=2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {
  94.                     double sc, cd;
  95.  
  96.                     sc = sqrt(1 - (ab*ab/4));
  97.                     cd = 1 - sc;
  98.                     ad = sqrt(ab*ab/4 + cd*cd);
  99.                     lpi = pi;
  100.                     pi = 2 * n * ad;
  101.             }
  102.  
  103.         if((int)(100000000*pi)!=PI_10e8)
  104.             panic("tid%d: pi*10e8=%d\n", THREAD->tid, (int) 100000000*pi);
  105.     }
  106.  
  107.     atomic_inc((int *) &threads_ok);
  108. }
  109.  
  110.  
  111. void test(void)
  112. {
  113.     thread_t *t;
  114.     int i;
  115.  
  116.     waitq_initialize(&can_start);
  117.  
  118.     printf("FPU test #1\n");
  119.     printf("Creating %d threads... ", THREADS);
  120.  
  121.     for (i=0; i<THREADS/2; i++) {  
  122.         if (!(t = thread_create(e, NULL, TASK, 0)))
  123.             panic("could not create thread\n");
  124.         thread_ready(t);
  125.         if (!(t = thread_create(pi, NULL, TASK, 0)))
  126.             panic("could not create thread\n");
  127.         thread_ready(t);
  128.     }
  129.     printf("ok\n");
  130.    
  131.     thread_sleep(1);
  132.     waitq_wakeup(&can_start, WAKEUP_ALL);
  133.  
  134.     while (threads_ok != THREADS)
  135.         ;
  136.        
  137.     printf("Test passed.\n");
  138. }
  139.