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#ifndef DOMEASUREMENT_H
#define DOMEASUREMENT_H
typedef unsigned long long int cycle_t;
extern void *frameAddress;
extern void *stackBeforeAction;
cycle_t doMeasurement(AC::Action &action) {
/* pseudocode:
cycle_t start, current;
RDTSC(start);
SAVESTACK(stackBeforeAction);
action.trigger();
RDTSC(current);
return current - start;
*/
cycle_t result;
AC::Action *a = &action;
__asm__ volatile (
"mov %2, %%ecx\n" // push argument (action == this) on the stack
"push %%ecx\n"
"movl %%esp, %0 \n"
"cpuid \n"
"rdtsc \n"
"mov %%eax, %%esi\n"
"cpuid \n"
"call *%%edi \n"
"cpuid \n"
"rdtsc \n"
"sub %%esi,%%eax\n" // current - start
"xorl %%edx, %%edx\n"
"pop %%ecx\n"
: "=m" (stackBeforeAction), "=A"(result)
: "m" ( a ), "D" (a->_wrapper)
: "%ebx", "%ecx", "%esi" // add "%ecx" in case of problems
);
return result;
}
#endif
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