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#include <stdio.h>
#include <iostream>
#include <stdlib.h>
#include <stdint.h>
#include <cstring>
#include <string.h>
#include <iostream>
#include <fstream>
#include <vector>
#include <iomanip>
#include <time.h>
#include <unistd.h>
#include "verilated_fst_c.h"
using namespace std;
class SimElement{
public:
virtual ~SimElement(){}
virtual void onReset(){}
virtual void postReset(){}
virtual void preCycle(){}
virtual void postCycle(){}
};
//#include <functional>
class TimeProcess{
public:
uint64_t wakeDelay = 0;
bool wakeEnable = false;
// std::function<int(double)> lambda;
virtual ~TimeProcess(){}
virtual void schedule(uint64_t delay){
wakeDelay = delay;
wakeEnable = true;
}
virtual void tick(){
// lambda = [this](double x) { return x+1 + this->wakeDelay; };
// lambda(1.0);
}
};
class SensitiveProcess{
public:
virtual ~SensitiveProcess(){}
virtual void tick(uint64_t time){
}
};
class ClockDomain : public TimeProcess{
public:
CData* clk;
CData* reset;
uint64_t tooglePeriod;
vector<SimElement*> simElements;
ClockDomain(CData *clk, CData *reset, uint64_t period, uint64_t delay){
this->clk = clk;
this->reset = reset;
*clk = 0;
this->tooglePeriod = period/2;
schedule(delay);
}
bool postCycle = false;
virtual void tick(){
if(*clk == 0){
for(SimElement* simElement : simElements){
simElement->preCycle();
}
postCycle = true;
*clk = 1;
schedule(0);
}else{
if(postCycle){
postCycle = false;
for(SimElement* simElement : simElements){
simElement->postCycle();
}
}else{
*clk = 0;
}
schedule(tooglePeriod);
}
}
void add(SimElement *that){
simElements.push_back(that);
}
};
class AsyncReset : public TimeProcess{
public:
CData* reset;
uint32_t state;
uint64_t duration;
AsyncReset(CData *reset, uint64_t duration){
this->reset = reset;
*reset = 0;
state = 0;
this->duration = duration;
schedule(0);
}
virtual void tick(){
switch(state){
case 0:
*reset = 1;
state = 1;
schedule(duration);
break;
case 1:
*reset = 0;
state = 2;
break;
}
}
};
class success : public std::exception { };
template <class T> class Workspace{
public:
vector<TimeProcess*> timeProcesses;
vector<SensitiveProcess*> checkProcesses;
T* top;
bool resetDone = false;
double timeToSec = 1e-12;
double speedFactor = 1.0;
uint64_t allowedTime = 0;
string name;
uint64_t time = 0;
#ifdef TRACE
VerilatedFstC* tfp;
#endif
ofstream logTraces;
Workspace(string name){
this->name = name;
top = new T;
logTraces.open (name + ".logTrace");
}
virtual ~Workspace(){
delete top;
#ifdef TRACE
delete tfp;
#endif
for(auto* p : timeProcesses) delete p;
for(auto* p : checkProcesses) delete p;
}
Workspace* setSpeedFactor(double value){
speedFactor = value;
return this;
}
virtual void postReset() {}
virtual void checks(){}
virtual void pass(){ throw success();}
virtual void fail(){ throw std::exception();}
virtual void dump(uint64_t i){
#ifdef TRACE
if(i >= TRACE_START) tfp->dump(i);
#endif
}
Workspace* run(double timeout = 1e6){
// init trace dump
#ifdef TRACE
Verilated::traceEverOn(true);
tfp = new VerilatedFstC;
top->trace(tfp, 99);
tfp->open((string(name)+ ".fst").c_str());
#endif
struct timespec start_time,tick_time;
uint64_t tickLastSimTime = 0;
top->eval();
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &start_time);
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tick_time);
uint32_t flushCounter = 0;
try {
while(1){
uint64_t delay = ~0l;
for(TimeProcess* p : timeProcesses)
if(p->wakeEnable && p->wakeDelay < delay)
delay = p->wakeDelay;
if(time*timeToSec > timeout){
printf("Simulation timeout triggered (%f)\n", time*timeToSec);
fail();
}
if(delay == ~0l){
fail();
}
if(delay != 0){
dump(time);
}
for(TimeProcess* p : timeProcesses) {
p->wakeDelay -= delay;
if(p->wakeDelay == 0){
p->wakeEnable = false;
p->tick();
}
}
top->eval();
for(auto* p : checkProcesses) p->tick(time);
if(delay != 0){
if(time - tickLastSimTime > 1000*400000 || time - tickLastSimTime > 1.0*speedFactor/timeToSec){
struct timespec end_time;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_time);
uint64_t diffInNanos = end_time.tv_sec*1e9 + end_time.tv_nsec - tick_time.tv_sec*1e9 - tick_time.tv_nsec;
tick_time = end_time;
double dt = diffInNanos*1e-9;
#ifdef PRINT_PERF
printf("Simulation speed : %f ms/realTime\n",(time - tickLastSimTime)/dt*timeToSec*1e3);
#endif
tickLastSimTime = time;
}
time += delay;
while(allowedTime < delay){
struct timespec end_time;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_time);
uint64_t diffInNanos = end_time.tv_sec*1e9 + end_time.tv_nsec - start_time.tv_sec*1e9 - start_time.tv_nsec;
start_time = end_time;
double dt = diffInNanos*1e-9;
allowedTime += dt*speedFactor/timeToSec;
if(allowedTime > 0.01*speedFactor/timeToSec)
allowedTime = 0.01*speedFactor/timeToSec;
}
allowedTime-=delay;
flushCounter++;
if(flushCounter > 100000){
#ifdef TRACE
tfp->flush();
//printf("flush\n");
#endif
flushCounter = 0;
}
}
if (Verilated::gotFinish())
exit(0);
}
cout << "timeout" << endl;
fail();
} catch (const success e) {
cout <<"SUCCESS " << name << endl;
} catch (const std::exception& e) {
cout << "FAIL " << name << endl;
}
dump(time);
dump(time+10);
#ifdef TRACE
tfp->close();
#endif
return this;
}
};
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