testcases/perfmon.c

   1 #include <stdio.h>
   2 #include "perfcounters.h"
   3
   4 static unsigned __perf_counter[PERF_COUNTERS];
   5
   6 static inline int  __builtin_mfcp2(int k)
   7 {
   8     int r;
   9
  10     asm(".set push;"
  11         ".set mips32r2;"
  12         "mfc2 %0,$%1;"
  13         ".set pop" : "=r" (r) : "i" (k));
  14
  15     return r;
  16 }
  17
  18 void perfmon_start(void)
  19 {
  20     int i;
  21
  22     /*
  23      * We have to use the macro construct as mfc2 requires a constant
  24      * argument and this is simpler than generating code on the fly.
  25      */
  26
  27 #define X(H) __perf_counter[H] = -__builtin_mfcp2(H);
  28     __FORALL_PERF_COUNTERS(X);
  29 #undef X
  30 }
  31
  32 void perfmon_report(void)
  33 {
  34     int i;
  35
  36 #define X(H) __perf_counter[H] += __builtin_mfcp2(H);
  37     __FORALL_PERF_COUNTERS(X);
  38 #undef X
  39
  40     for (i = 0; i < PERF_COUNTERS; ++i)
  41         printf("%s = %d\n", __perf_counter_names[i], __perf_counter[i]);
  42 }
  43