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