benchmarks/common/util.h

   1 // See LICENSE for license details.
   2
   3 #ifndef __UTIL_H
   4 #define __UTIL_H
   5
   6 extern void setStats(int enable);
   7
   8 #include <stdint.h>
   9
  10 #define static_assert(cond) switch(0) { case 0: case !!(long)(cond): ; }
  11
  12 static int verify(int n, const volatile int* test, const int* verify)
  13 {
  14   int i;
  15   // Unrolled for faster verification
  16   for (i = 0; i < n/2*2; i+=2)
  17   {
  18     int t0 = test[i], t1 = test[i+1];
  19     int v0 = verify[i], v1 = verify[i+1];
  20     if (t0 != v0) return i+1;
  21     if (t1 != v1) return i+2;
  22   }
  23   if (n % 2 != 0 && test[n-1] != verify[n-1])
  24     return n;
  25   return 0;
  26 }
  27
  28 static int verifyDouble(int n, const volatile double* test, const double* verify)
  29 {
  30   int i;
  31   // Unrolled for faster verification
  32   for (i = 0; i < n/2*2; i+=2)
  33   {
  34     double t0 = test[i], t1 = test[i+1];
  35     double v0 = verify[i], v1 = verify[i+1];
  36     int eq1 = t0 == v0, eq2 = t1 == v1;
  37     if (!(eq1 & eq2)) return i+1+eq1;
  38   }
  39   if (n % 2 != 0 && test[n-1] != verify[n-1])
  40     return n;
  41   return 0;
  42 }
  43
  44 static void __attribute__((noinline)) barrier(int ncores)
  45 {
  46   static volatile int sense;
  47   static volatile int count;
  48   static __thread int threadsense;
  49
  50   __sync_synchronize();
  51
  52   threadsense = !threadsense;
  53   if (__sync_fetch_and_add(&count, 1) == ncores-1)
  54   {
  55     count = 0;
  56     sense = threadsense;
  57   }
  58   else while(sense != threadsense)
  59     ;
  60
  61   __sync_synchronize();
  62 }
  63
  64 static uint64_t lfsr(uint64_t x)
  65 {
  66   uint64_t bit = (x ^ (x >> 1)) & 1;
  67   return (x >> 1) | (bit << 62);
  68 }
  69
  70 static uintptr_t insn_len(uintptr_t pc)
  71 {
  72   return (*(unsigned short*)pc & 3) ? 4 : 2;
  73 }
  74
  75 #ifdef __riscv
  76 #include "encoding.h"
  77 #endif
  78
  79 #define stringify_1(s) #s
  80 #define stringify(s) stringify_1(s)
  81 #define stats(code, iter) do { \
  82     unsigned long _c = -read_csr(mcycle), _i = -read_csr(minstret); \
  83     code; \
  84     _c += read_csr(mcycle), _i += read_csr(minstret); \
  85     if (cid == 0) \
  86       printf("\n%s: %ld cycles, %ld.%ld cycles/iter, %ld.%ld CPI\n", \
  87              stringify(code), _c, _c/iter, 10*_c/iter%10, _c/_i, 10*_c/_i%10); \
  88   } while(0)
  89
  90 #endif //__UTIL_H