benchmarks/common/util.h

   1 // helpful utility and synch functions
   2
   3 // relies on defining "ncores" before including this file...
   4
   5 #ifndef __UTIL_H
   6 #define __UTIL_H
   7
   8 #include <machine/syscall.h>
   9
  10 #define rdcycle() ({ unsigned long _c; asm volatile ("rdcycle %0" : "=r"(_c) :: "memory"); _c; })
  11 #define rdinstret() ({ unsigned long _c; asm volatile ("rdinstret %0" : "=r"(_c) :: "memory"); _c; })
  12
  13 void __attribute__((noinline)) barrier()
  14 {
  15   static volatile int sense;
  16   static volatile int count;
  17   static __thread int threadsense;
  18
  19   __sync_synchronize();
  20
  21   threadsense = !threadsense;
  22   if (__sync_fetch_and_add(&count, 1) == ncores-1)
  23   {
  24     count = 0;
  25     sense = threadsense;
  26   }
  27   else while(sense != threadsense)
  28     ;
  29
  30   __sync_synchronize();
  31 }
  32
  33
  34
  35
  36
  37 void finishTest(int test_result)
  38 {
  39 #if HOST_DEBUG
  40   if ( test_result == 1 )
  41     printf( "*** PASSED ***\n" );
  42   else
  43     printf( "*** FAILED *** (tohost = %d)\n", test_result);
  44   exit(0);
  45 #else
  46    {
  47       // perform exit syscall
  48       asm volatile(
  49           "move a0,%0 ;"
  50           "li a1,0    ;"
  51           "li a2,0    ;"
  52           "li a3,0    ;"
  53           "li v0,%1   ;"
  54           "syscall" : : "r"(test_result) , "i"(SYS_exit));
  55    }
  56 #endif
  57 }
  58
  59 #endif //__UTIL_H
  60