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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 <atomic.h>
  36. #include <proc/thread.h>
  37.  
  38. #include <arch.h>
  39. #include <arch/arch.h>
  40.  
  41. #ifdef CONFIG_BENCH
  42. #include <arch/cycle.h>
  43. #endif
  44.  
  45. #if (defined(ia32) || defined(amd64) || defined(ia64) || defined(ia32xen))
  46.  
  47. #define THREADS     150*2
  48. #define ATTEMPTS    100
  49.  
  50. #define E_10e8  271828182
  51. #define PI_10e8 314159265
  52.  
  53.  
  54. #ifdef KERN_ia32_ARCH_H_
  55. static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }
  56. #endif
  57.  
  58. #ifdef KERN_amd64_ARCH_H_
  59. static inline double sqrt(double x) { double v; __asm__ ("fsqrt\n" : "=t" (v) : "0" (x)); return v; }
  60. #endif
  61.  
  62. #ifdef KERN_ia64_ARCH_H_
  63. static inline long double sqrt(long double a)
  64. {  
  65.     long double x = 1;
  66.     long double lx = 0;
  67.  
  68.     if(a<0.00000000000000001) return 0;
  69.        
  70.     while(x!=lx)
  71.     {
  72.         lx=x;
  73.         x=(x+(a/x))/2;
  74.     }
  75.     return x;
  76. }
  77. #endif
  78.  
  79.  
  80.  
  81. static atomic_t threads_ok;
  82. static waitq_t can_start;
  83.  
  84. static void e(void *data)
  85. {
  86.     int i;
  87.     double e,d,le,f;
  88.  
  89.     thread_detach(THREAD);
  90.  
  91.     waitq_sleep(&can_start);
  92.  
  93.     for (i = 0; i<ATTEMPTS; i++) {
  94.         le=-1;
  95.         e=0;
  96.         f=1;
  97.  
  98.         for(d=1;e!=le;d*=f,f+=1) {
  99.             le=e;
  100.             e=e+1/d;
  101.         }
  102.  
  103.         if((int)(100000000*e)!=E_10e8)
  104.             panic("tid%d: e*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*e),(unative_t) E_10e8);
  105.     }
  106.  
  107.     printf("tid%d: e*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*e),(unative_t) E_10e8);
  108.     atomic_inc(&threads_ok);
  109. }
  110.  
  111. static void pi(void *data)
  112. {
  113.  
  114. #ifdef KERN_ia64_ARCH_H_
  115. #undef PI_10e8 
  116. #define PI_10e8 3141592
  117. #endif
  118.  
  119.  
  120.     int i;
  121.     double lpi, pi;
  122.     double n, ab, ad;
  123.    
  124.     thread_detach(THREAD);
  125.  
  126.     waitq_sleep(&can_start);
  127.  
  128.  
  129.     for (i = 0; i<ATTEMPTS; i++) {
  130.         lpi = -1;
  131.         pi = 0;
  132.  
  133.         for (n=2, ab = sqrt(2); lpi != pi; n *= 2, ab = ad) {
  134.             double sc, cd;
  135.  
  136.             sc = sqrt(1 - (ab*ab/4));
  137.             cd = 1 - sc;
  138.             ad = sqrt(ab*ab/4 + cd*cd);
  139.             lpi = pi;
  140.             pi = 2 * n * ad;
  141.         }
  142.  
  143. #ifdef KERN_ia64_ARCH_H_
  144.         if((int)(1000000*pi)!=PI_10e8)
  145.             panic("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (1000000*pi),(unative_t) (PI_10e8/100));
  146. #else
  147.         if((int)(100000000*pi)!=PI_10e8)
  148.             panic("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*pi),(unative_t) PI_10e8);
  149. #endif
  150.  
  151.     }
  152.  
  153.     printf("tid%d: pi*10e8=%zd should be %zd\n", THREAD->tid, (unative_t) (100000000*pi),(unative_t) PI_10e8);
  154.     atomic_inc(&threads_ok);
  155. }
  156.  
  157. void test_fpu1(void)
  158. {
  159. #ifdef CONFIG_BENCH
  160.     uint64_t t0 = get_cycle();
  161. #endif
  162.     thread_t *t;
  163.     int i;
  164.  
  165.     waitq_initialize(&can_start);
  166.  
  167.     printf("FPU test #1\n");
  168.     printf("Creating %d threads... ", THREADS);
  169.  
  170.     for (i=0; i<THREADS/2; i++) {  
  171.         if (!(t = thread_create(e, NULL, TASK, 0, "e")))
  172.             panic("could not create thread\n");
  173.         thread_ready(t);
  174.         if (!(t = thread_create(pi, NULL, TASK, 0, "pi")))
  175.             panic("could not create thread\n");
  176.         thread_ready(t);
  177.     }
  178.     printf("ok\n");
  179.    
  180.     thread_sleep(1);
  181.     waitq_wakeup(&can_start, WAKEUP_ALL);
  182.  
  183.     while (atomic_get(&threads_ok) != THREADS)
  184.         ;
  185.        
  186.     printf("Test passed.\n");
  187. #ifdef CONFIG_BENCH
  188.     uint64_t dt = get_cycle() - t0;
  189.     printf("Time: %.*d cycles\n", sizeof(dt) * 2, dt);
  190. #endif
  191. }
  192.  
  193. #else
  194.  
  195. void test_fpu1(void)
  196. {
  197.     printf("This test is available only on Intel/AMD platforms.");
  198. }
  199.  
  200. #endif
  201.