Changeset 110 for trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Prediction_unit_Glue/src/Prediction_unit_Glue_genMealy_decod.cpp

Timestamp:

Feb 19, 2009, 5:31:47 PM (15 years ago)

Author:

rosiere

Message:

1) OOO_egine : add stat to depiste low perf source
2) Commit : add stat
3) LSU_Pointer : retire - always ack (else combinatory loop). insert - max nb_inst_memory
4) TopLevel? : add debug_idle_time to stop combinatory loop.
5) Issue_queue : add reexecute_queue, new implementation (routage after issue_queue)
6) Decod / Predictor : add "can_continue"

File:

• trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Prediction_unit_Glue/src/Prediction_unit_Glue_genMealy_decod.cpp (modified) (12 diffs)

trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Prediction_unit_Glue/src/Prediction_unit_Glue_genMealy_decod.cpp

@@ -78 +78 @@
           //   * branch was not detected
           Tcontrol_t        miss_decod            = (branch_state == BRANCH_STATE_NONE);
+          Tcontrol_t        can_continue          = false;
 
           log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"  * DECOD [%d][%d]          : valid",decod_unit,i);
@@ -90 +91 @@
             {
               Tbranch_condition_t condition    = PORT_READ(in_DECOD_BRANCH_CONDITION            [decod_unit][i]);
-              Tcontrol_t          direction    = PORT_READ(in_DECOD_BRANCH_DIRECTION            [decod_unit][i]);
+              Tcontrol_t          take;
               Taddress_t          address_src  = PORT_READ(in_DECOD_ADDRESS_SRC                 [decod_unit][i]);
               Taddress_t          address_dest = PORT_READ(in_DECOD_ADDRESS_DEST                [decod_unit][i]);
@@ -105 +106 @@
                     log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"      * BRANCH_CONDITION_NONE_WITH_WRITE_STACK");
 
+                    take        = true ;
                     is_accurate = true ;//PORT_READ(in_DECOD_RAS_HIT [port]);
                     use_ras     = true ;
@@ -119 +121 @@
                     log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"      * BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK");
 
+                    take        = true ;
                     is_accurate = false; // address unknow : in a register
                     use_ras     = true;
@@ -132 +135 @@
                     log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"      * BRANCH_CONDITION_READ_STACK");
 
+                    take        = true ;
                     is_accurate = PORT_READ(in_DECOD_RAS_HIT [port]);
                     use_ras     = true;
@@ -146 +150 @@
 
                     //   * READ_REGISTER_WITHOUT_WRITE_STACK : Take but destination is unknow - don't continue
+                    take        = true ;
                     is_accurate = false; // address unknow : in a register
 
@@ -158 +163 @@
                     log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"      * BRANCH_CONDITION_FLAG");
 
+                    take        = PORT_READ(in_DECOD_BRANCH_DIRECTION [decod_unit][i]);
                     is_accurate = true; // address dest is know
 
@@ -168 +174 @@
                     log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"      * BRANCH_CONDITION_NONE_WITHOUT_WRITE_STACK");
 
+                    take        = true;
                     is_accurate = true;
 
@@ -173 +180 @@
                   }
                 }
+
+              log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * take         : %d",take);
 
               if (use_btb)
@@ -181 +190 @@
                   PORT_WRITE(out_DECOD_BTB_ADDRESS_DEST    [port],address_dest);
                   PORT_WRITE(out_DECOD_BTB_CONDITION       [port],condition);
-                  PORT_WRITE(out_DECOD_BTB_LAST_TAKE       [port],direction);
+                  PORT_WRITE(out_DECOD_BTB_LAST_TAKE       [port],take);
                   PORT_WRITE(out_DECOD_BTB_MISS_PREDICTION [port],1);
                   PORT_WRITE(out_DECOD_BTB_IS_ACCURATE     [port],is_accurate);
@@ -198 +207 @@
                   PORT_WRITE(out_DECOD_UPT_BTB_ADDRESS_DEST[port],address_dest);
                   PORT_WRITE(out_DECOD_UPT_BTB_CONDITION   [port],condition);
-                  PORT_WRITE(out_DECOD_UPT_BTB_LAST_TAKE   [port],direction);
+                  PORT_WRITE(out_DECOD_UPT_BTB_LAST_TAKE   [port],take);
                   PORT_WRITE(out_DECOD_UPT_RAS_ADDRESS     [port],PORT_READ(in_DECOD_RAS_ADDRESS_POP [port]));
                   PORT_WRITE(out_DECOD_UPT_IS_ACCURATE     [port],is_accurate);
                 }
+
+              can_continue = false; // need update upt
             }
-//        else
-//          {
-//               log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * hit");
+          else
+            {
+              log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * hit");
+
+              if (branch_state == BRANCH_STATE_SPEC_NTAKE)
+                can_continue = PORT_READ(in_DECOD_UPT_CAN_CONTINUE [port]);
+              else
+                // BRANCH_STATE_NONE       -> miss
+                // BRANCH_STATE_NSPEC_TAKE -> take
+                // BRANCH_STATE_SPEC_TAKE  -> take
+                can_continue = false;
 
 //            miss_decod = false;
 //            // Hit speculation
-//          }
+            }
           
-
           // in all case
-          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_btb : %d",use_btb);
-          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_ras : %d",use_ras);
-          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_upt : %d",use_upt);
+          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * can_continue : %d",can_continue);
+          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_btb      : %d",use_btb);
+          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_ras      : %d",use_ras);
+          log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * use_upt      : %d",use_upt);
           log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * btb_ack [%d] : %d",port,PORT_READ(in_DECOD_BTB_ACK [port]));
           log_printf(TRACE,Prediction_unit_Glue,FUNCTION,"    * ras_ack [%d] : %d",port,PORT_READ(in_DECOD_RAS_ACK [port]));
@@ -250 +269 @@
           if (_param->_have_port_depth)
           PORT_WRITE(out_DECOD_UPT_UPDATE_PREDICTION_ID [port],depth);
-          
+          PORT_WRITE(out_DECOD_CAN_CONTINUE [decod_unit][i], can_continue);
+
           port ++; // have find port
         }