Changeset 88 for trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Update_Prediction_Table/src/Update_Prediction_Table_genMealy_predict.cpp

Timestamp:

Dec 10, 2008, 7:31:39 PM (16 years ago)

Author:

rosiere

Message:

Almost complete design
with Test and test platform

File:

• trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Update_Prediction_Table/src/Update_Prediction_Table_genMealy_predict.cpp (modified) (1 diff)

trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Update_Prediction_Table/src/Update_Prediction_Table_genMealy_predict.cpp

@@ -22 +22 @@
   void Update_Prediction_Table::genMealy_predict (void)
   {
-    log_printf(FUNC,Update_Prediction_Table,FUNCTION,"Begin");
-    
+    log_begin(Update_Prediction_Table,FUNCTION);
+    log_function(Update_Prediction_Table,FUNCTION,_name.c_str());
+
+    if (PORT_READ(in_NRESET) != 0)
+      {
+
     for (uint32_t i=0; i<_param->_nb_inst_predict; i++)
       {
         Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_PREDICT_CONTEXT_ID [i]):0;
-        uint32_t   top     = reg_TOP[context];
+        uint32_t   top     = reg_UFPT_TOP[context];
 
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"PREDICT [%d] (genMealy)",i);
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * context     : %d",context);
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * top         : %d",top);
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * state       : %s",toString(reg_UPDATE_PREDICTION_TABLE [context][top]._state).c_str());
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * is accurate : %d",PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i]));
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"PREDICT [%d] (genMealy)",i);
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * context     : %d",context);
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * top         : %d",top);
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * state       : %s",toString(reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state).c_str());
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * is accurate : %d",PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i]));
 //      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * need update : %d",reg_NB_ELT_NEED_UPDATE [context]);
 
-        // Not Full, accurate and no previous miss
-        // Optimisation to restart faster :
-        //   don't counter nb_elt_ko, but just nb_elt that need a update (change branch structure)
-        internal_PREDICT_ACK [i] = ((reg_UPDATE_PREDICTION_TABLE [context][top]._state == UPDATE_PREDICTION_STATE_EMPTY) and
-                                    PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i]) and
-                                    (reg_NB_ELT_NEED_UPDATE [context] == 0));
+        internal_PREDICT_UPDATE_PREDICTION_ID [i] = top;
 
-//      log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * ACK         : %d",internal_PREDICT_ACK [i]);
+        if (_param->_have_port_depth)
+        PORT_WRITE(out_PREDICT_UPDATE_PREDICTION_ID [i], internal_PREDICT_UPDATE_PREDICTION_ID [i]);
 
+        bool is_accurate = not _param->_not_accurate_block_predict or reg_IS_ACCURATE[context];
+
+        // Ack if :
+        //  * slot is empty
+        //  * no previous miss
+        //  * is_accurate
+        internal_PREDICT_ACK [i] = ((reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state == UPDATE_FETCH_PREDICTION_STATE_EMPTY) and
+//                                  PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i]) and
+                                    (reg_EVENT_STATE [context] == EVENT_STATE_OK) and
+                                    is_accurate);
+
+
+        log_printf(TRACE,Update_Prediction_Table,FUNCTION,"  * ACK         : %d",internal_PREDICT_ACK [i]);
         PORT_WRITE(out_PREDICT_ACK [i], internal_PREDICT_ACK [i]);
       }
 
-    log_printf(FUNC,Update_Prediction_Table,FUNCTION,"End");
+      }//don't reset
+
+    log_end(Update_Prediction_Table,FUNCTION);
   };