Vcd var lookup

Signed-off-by: James Cherry <cherry@parallaxsw.com>

power/Power.i

@@ -122,4 +122,12 @@ report_vcd_waveforms(const char *filename)
   reportVcdWaveforms(filename, Sta::sta());
 }
 
+// debugging
+void
+report_vcd_var_values(const char *filename,
+                      const char *var_name)
+{
+  reportVcdVarValues(filename, var_name, Sta::sta());
+}
+
 %} // inline

power/ReadVcdActivities.cc

@@ -28,7 +28,6 @@
 namespace sta {
 
 using std::min;
-using std::swap;
 using std::to_string;
 
 class ReadVcdActivities : public StaState
@@ -41,9 +40,17 @@ public:
 
 private:
   void setActivities();
-  void findVarActivity(const char *pin_name,
+  void setVarActivity(const char *pin_name,
+                      const VcdValues &var_values,
+                      int value_bit);
+  void findVarActivity(const VcdValues &var_values,
                        int value_bit,
-                       const VcdValues &var_values);
+                       // Return values.
+                       int &transition_count,
+                       float &activity,
+                       float &duty);
+  void checkClkPeriod(const Pin *pin,
+                      int transition_count);
 
   const char *filename_;
   const char *scope_;
@@ -83,8 +90,6 @@ ReadVcdActivities::readActivities()
   for (Clock *clk : *sta_->sdc()->clocks())
     clk_period_ = min(clk->period(), clk_period_);
 
-  //checkClkPeriods();
-  
   setActivities();
 }
 
@@ -92,12 +97,12 @@ void
 ReadVcdActivities::setActivities()
 {
   size_t scope_length = strlen(scope_);
-  for (VcdVar &var : vcd_.vars()) {
+  for (VcdVar *var : vcd_.vars()) {
     const VcdValues &var_values = vcd_.values(var);
     if (!var_values.empty()
-        && (var.type() == VcdVarType::wire
-            || var.type() == VcdVarType::reg)) {
-      string var_name = var.name();
+        && (var->type() == VcdVarType::wire
+            || var->type() == VcdVarType::reg)) {
+      string var_name = var->name();
       // string::starts_with in c++20
       if (scope_length
           && var_name.substr(0, scope_length) == scope_)
@@ -106,8 +111,8 @@ ReadVcdActivities::setActivities()
         var_name += ' ';
       const char *sta_name = verilogToSta(var_name.c_str());
 
-      if (var.width() == 1)
-        findVarActivity(sta_name, 0, var_values);
+      if (var->width() == 1)
+        setVarActivity(sta_name, var_values, 0);
       else {
         char *bus_name;
         int from, to;
@@ -120,7 +125,7 @@ ReadVcdActivities::setActivities()
             pin_name += '[';
             pin_name += to_string(bus_bit);
             pin_name += ']';
-            findVarActivity(pin_name.c_str(), value_bit, var_values);
+            setVarActivity(pin_name.c_str(), var_values, value_bit);
             value_bit++;
           }
         }
@@ -130,7 +135,7 @@ ReadVcdActivities::setActivities()
             pin_name += '[';
             pin_name += to_string(bus_bit);
             pin_name += ']';
-            findVarActivity(pin_name.c_str(), value_bit, var_values);
+            setVarActivity(pin_name.c_str(), var_values, value_bit);
             value_bit++;
           }
         }
@@ -140,11 +145,39 @@ ReadVcdActivities::setActivities()
 }
 
 void
-ReadVcdActivities::findVarActivity(const char *pin_name,
-                                   int value_bit,
-                                   const VcdValues &var_values)
+ReadVcdActivities::setVarActivity(const char *pin_name,
+                                  const VcdValues &var_values,
+                                  int value_bit)
 {
-  int transition_count = 0;
+  const Pin *pin = network_->findPin(pin_name);
+  if (pin) {
+    int transition_count;
+    float activity, duty;
+    findVarActivity(var_values, value_bit,
+                    transition_count, activity, duty);
+    debugPrint(debug_, "read_vcd_activities", 1,
+               "%s transitions %d activity %.2f duty %.2f",
+               pin_name,
+               transition_count,
+               activity,
+               duty);
+    if (sdc_->isLeafPinClock(pin))
+      checkClkPeriod(pin, transition_count);
+    else
+      power_->setUserActivity(pin, activity, duty,
+                              PwrActivityOrigin::user);
+  }
+}
+
+void
+ReadVcdActivities::findVarActivity(const VcdValues &var_values,
+                                   int value_bit,
+                                   // Return values.
+                                   int &transition_count,
+                                   float &activity,
+                                   float &duty)
+{
+  transition_count = 0;
   char prev_value = var_values[0].value();
   VcdTime prev_time = var_values[0].time();
   VcdTime high_time = 0;
@@ -164,20 +197,23 @@ ReadVcdActivities::findVarActivity(const char *pin_name,
   VcdTime time_max = vcd_.timeMax();
   if (prev_value == '1')
     high_time += time_max - prev_time;
-  float duty = static_cast<float>(high_time) / time_max;
-  float activity = transition_count
+  duty = static_cast<float>(high_time) / time_max;
+  activity = transition_count
     / (time_max * vcd_.timeUnitScale() / clk_period_);
+}
 
-  Pin *pin = network_->findPin(pin_name);
-  if (pin) {
-    debugPrint(debug_, "read_vcd_activities", 1,
-               "%s transitions %d activity %.2f duty %.2f",
-               pin_name,
-               transition_count,
-               activity,
-               duty);
-    power_->setUserActivity(pin, activity, duty,
-                            PwrActivityOrigin::user);
+void
+ReadVcdActivities::checkClkPeriod(const Pin *pin,
+                                  int transition_count)
+{
+  VcdTime time_max = vcd_.timeMax();
+  float sim_period = time_max * vcd_.timeUnitScale() / ((transition_count - 1) / 2.0);
+
+  ClockSet *clks = sdc_->findLeafPinClocks(pin);
+  if (clks) {
+    for (Clock *clk : *clks) {
+      //printf("%.2e %.2e\n", clk->period(), sim_period);
+    }
   }
 }
 

power/Vcd.cc

@@ -29,7 +29,50 @@ Vcd::Vcd(StaState *sta) :
 {
 }
 
-////////////////////////////////////////////////////////////////
+Vcd::Vcd(const Vcd &vcd) :
+  StaState(vcd),
+  date_(vcd.date_),
+  comment_(vcd.comment_),
+  version_(vcd.version_),
+  time_scale_(vcd.time_scale_),
+  time_unit_(vcd.time_unit_),
+  time_unit_scale_(vcd.time_unit_scale_),
+  vars_(vcd.vars_),
+  var_name_map_(vcd.var_name_map_),
+  max_var_name_length_(vcd.max_var_name_length_),
+  max_var_width_(vcd.max_var_width_),
+  id_values_map_(vcd.id_values_map_),
+  min_delta_time_(vcd.min_delta_time_),
+  time_max_(vcd.time_max_)
+{
+}
+
+Vcd&
+Vcd::operator=(Vcd &&vcd1)
+{
+  date_ = vcd1.date_;
+  comment_ = vcd1.comment_;
+  version_ = vcd1.version_;
+  time_scale_ = vcd1.time_scale_;
+  time_unit_ = vcd1.time_unit_;
+  time_unit_scale_ = vcd1.time_unit_scale_;
+  vars_ = vcd1.vars_;
+  var_name_map_ = vcd1.var_name_map_;
+  max_var_name_length_ = vcd1.max_var_name_length_;
+  max_var_width_ = vcd1.max_var_width_;
+  id_values_map_ = vcd1.id_values_map_;
+  min_delta_time_ = vcd1.min_delta_time_;
+  time_max_ = vcd1.time_max_;
+
+  vcd1.vars_.clear();
+  return *this;
+}
+
+Vcd::~Vcd()
+{
+  for (VcdVar *var : vars_)
+    delete var;
+}
 
 void
 Vcd::setTimeUnit(const string &time_unit,
@@ -72,7 +115,7 @@ Vcd::setMinDeltaTime(VcdTime min_delta_time)
 void
 Vcd::setTimeMax(VcdTime time_max)
 {
-  time_max_ = time_max;
+ time_max_ = time_max;
 }
 
 void
@@ -81,13 +124,21 @@ Vcd::makeVar(string &name,
              int width,
              string &id)
 {
-  vars_.push_back(VcdVar(name, type, width, id));
+  VcdVar *var = new VcdVar(name, type, width, id);
+  vars_.push_back(var);
+  var_name_map_[name] = var;
   max_var_name_length_ = std::max(max_var_name_length_, name.size());
   max_var_width_ = std::max(max_var_width_, width);
   // Make entry for var ID.
   id_values_map_[id].clear();
 }
 
+VcdVar *
+Vcd::var(const string name)
+{
+  return var_name_map_[name];
+}
+
 bool
 Vcd::varIdValid(string &id)
 {
@@ -113,17 +164,17 @@ Vcd::varAppendBusValue(string &id,
 }
 
 VcdValues &
-Vcd::values(VcdVar &var)
+Vcd::values(VcdVar *var)
 {
-  if (id_values_map_.find(var.id()) ==  id_values_map_.end()) {
+  if (id_values_map_.find(var->id()) ==  id_values_map_.end()) {
     report_->error(805, "Unknown variable %s ID %s",
-                   var.name().c_str(),
-                   var.id().c_str());
+                   var->name().c_str(),
+                   var->id().c_str());
     static VcdValues empty;
     return empty;
   }
   else
-    return id_values_map_[var.id()];
+    return id_values_map_[var->id()];
 }
 
 ////////////////////////////////////////////////////////////////

power/Vcd.hh

@@ -36,6 +36,7 @@ class VcdValue;
 typedef vector<VcdValue> VcdValues;
 typedef int64_t VcdTime;
 typedef vector<string> VcdScope;
+typedef map<string, VcdVar*> VcdNameMap;
 
 enum class VcdVarType { wire, reg, parameter, real };
 
@@ -43,7 +44,12 @@ class Vcd : public StaState
 {
 public:
   Vcd(StaState *sta);
-  VcdValues &values(VcdVar &var);
+  Vcd(const Vcd &vcd);
+  // Move copy assignment.
+  Vcd& operator=(Vcd &&vcd1);
+  ~Vcd();
+  VcdVar *var(const string name);
+  VcdValues &values(VcdVar *var);
 
   const string &date() const { return date_; }
   void setDate(const string &date);
@@ -61,7 +67,7 @@ public:
   void setTimeMax(VcdTime time_max);
   VcdTime minDeltaTime() const { return min_delta_time_; }
   void setMinDeltaTime(VcdTime min_delta_time);
-  vector<VcdVar> vars() { return vars_; }
+  vector<VcdVar*> vars() { return vars_; }
   void makeVar(string &name,
                VcdVarType type,
                int width,
@@ -84,7 +90,8 @@ private:
   string time_unit_;
   double time_unit_scale_;
 
-  vector<VcdVar> vars_;
+  vector<VcdVar*> vars_;
+  VcdNameMap var_name_map_;
   size_t max_var_name_length_;
   int max_var_width_;
   map<string, VcdValues> id_values_map_;

power/VcdReader.cc

@@ -344,11 +344,11 @@ reportWaveforms(Vcd &vcd,
   int time_delta = vcd.minDeltaTime();
 
   int max_var_name_length = vcd.maxVarNameLength();
-  for (VcdVar &var : vcd.vars()) {
+  for (VcdVar *var : vcd.vars()) {
     string line;
     stringPrint(line, " %-*s",
                 static_cast<int>(max_var_name_length),
-                var.name().c_str());
+                var->name().c_str());
     const VcdValues &var_values = vcd.values(var);
     if (!var_values.empty()) {
       size_t value_index = 0;
@@ -367,7 +367,7 @@ reportWaveforms(Vcd &vcd,
           // 01UZX
           char value = var_value.value();
           char prev_value = prev_var_value.value();
-          if (var.width() == 1) {
+          if (var->width() == 1) {
             if (value == '0' || value == '1') {
               for (int z = 0; z < zoom; z++) {
                 if (z == 0
@@ -404,4 +404,25 @@ reportWaveforms(Vcd &vcd,
   }
 }
 
+void
+reportVcdVarValues(const char *filename,
+                   const char *var_name,
+                   StaState *sta)
+{
+  Vcd vcd = readVcdFile(filename, sta);
+  VcdVar *var = vcd.var(var_name);
+  if (var) {
+    Report *report = sta->report();
+    for (const VcdValue &var_value : vcd.values(var)) {
+      double time = var_value.time() * vcd.timeUnitScale();
+      char value = var_value.value();
+      if (value == '\0')
+        report->reportLine("%.2e %llu",
+                           time, var_value.busValue());
+      else
+        report->reportLine("%.2e %c", time, value);
+    }
+  }
+}
+
 }

power/VcdReader.hh

@@ -30,4 +30,10 @@ void
 reportVcdWaveforms(const char *filename,
                    StaState *sta);
 
-}
+void
+reportVcdVarValues(const char *filename,
+                   const char *var_name,
+                   StaState *sta);
+
+} // namespace
+