Про свитч-кейсы

SVC_MUTEX_DESTROY,

   ....
   ....
}SVC;

Использование:
void svc(unsigned int num, unsigned int param1, unsigned int param2, unsigned int param3)
{
    disable_interrupts();
    ++__KERNEL->svc_count;
    switch (num)
    {
    //process related
    case SVC_PROCESS_CREATE:
        kprocess_create((REX*)param1, (PROCESS**)param2);
        break;
    case SVC_PROCESS_GET_FLAGS:
        kprocess_get_flags((PROCESS*)param1, (unsigned int*)param2);
        break;
    case SVC_PROCESS_SET_FLAGS:
        kprocess_set_flags((PROCESS*)param1, (unsigned int)param2);
        break;
    case SVC_PROCESS_GET_PRIORITY:
        kprocess_get_priority((PROCESS*)param1, (unsigned int*)param2);
        break;
    case SVC_PROCESS_SET_PRIORITY:
        kprocess_set_priority((PROCESS*)param1, (unsigned int)param2);
        break;
    case SVC_PROCESS_DESTROY:
        kprocess_destroy((PROCESS*)param1);
        break;
    case SVC_PROCESS_SLEEP:
        kprocess_sleep_current((TIME*)param1, PROCESS_SYNC_TIMER_ONLY, NULL);
        break;
#if (KERNEL_PROFILING)
    case SVC_PROCESS_SWITCH_TEST:
        kprocess_switch_test();
        break;
    case SVC_PROCESS_INFO:
        kprocess_info();
        break;
#endif //KERNEL_PROFILING
    //mutex related
    case SVC_MUTEX_CREATE:
        kmutex_create((MUTEX**)param1);
        break;
    case SVC_MUTEX_LOCK:
        kmutex_lock((MUTEX*)param1, (TIME*)param2);
        break;
    case SVC_MUTEX_UNLOCK:
        kmutex_unlock((MUTEX*)param1);
        break;
    case SVC_MUTEX_DESTROY:
        kmutex_destroy((MUTEX*)param1);
        break;
   ...
   ...
   default:
        kprocess_error_current(ERROR_INVALID_SVC);
    }
    --__KERNEL->svc_count;
    enable_interrupts();
}

Для АРМ один из примеров дает прирост производительности в 10% (.5us). Вопрос: какой и почему?

Гугл врядли поможет, нужно лишь проявить смекалку. Ответы на следующей неделе.