Changeset 117 for trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Rename_unit/Register_translation_unit/Stat_List_unit/include/Types.h

Timestamp:

May 16, 2009, 4:42:39 PM (15 years ago)

Author:

rosiere

Message:

1) Platforms : add new organization for test
2) Load_Store_Unit : add array to count nb_check in store_queue
3) Issue_queue and Core_Glue : rewrite the issue network
4) Special_Register_Unit : add reset value to register CID
5) Softwares : add multicontext test
6) Softwares : add SPECINT
7) Softwares : add MiBench?
7) Read_queue : inhib access for r0
8) Change Core_Glue (network) - dont yet support priority and load balancing scheme

File:

• trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Rename_unit/Register_translation_unit/Stat_List_unit/include/Types.h (modified) (6 diffs)

trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Rename_unit/Register_translation_unit/Stat_List_unit/include/Types.h

@@ -23 +23 @@
   class stat_list_entry_t
   {
-  public : bool     _is_free ; // set = is present in free list
-  public : bool     _is_link ; // set = is present in rat
-//public : bool     _is_valid; // set = an instruction have write in this register
-//public : uint32_t _counter ; // number of register that must read this register
+  public : bool     _is_free      ; // set = is present in free list
+  public : bool     _is_link      ; // set = is present in rat
+  public : bool     _is_use       ; // set = is present in ROB (used by an instruction as destination)
+                                    // not necesseray in single thread mode : because an thread can't rename when they have an event
+                                    // in multi thread, the renaming continue and an old register can be reused
 
   public :  stat_list_entry_t (void) {};
@@ -35 +36 @@
       _is_free  = 0;
       _is_link  = is_link;
-//    _is_valid = 1;
-//    _counter  = 0;
+      _is_use   = is_link;
     }
 
-//   public : void insert_read (void)
-//     {
-//    _counter ++;
-//     }
+  public : void insert_write_old (void)
+    {
+      // old is not in the rat, but is already used (if miss prediction or event)
+      _is_link  = 0;
+    }
 
-  public : void insert_write (void)
+  public : void insert_write_new (void)
     {
       _is_free  = 0;
       _is_link  = 1;
-//    _is_valid = 0;
+      _is_use   = 1;
     }
-
-//   public : void retire_read (void)
-//     {
-//    _counter --;
-//     }
 
   public : void retire_write_old (bool restore, bool restore_old)
@@ -62 +58 @@
       // 1       0           0       - event and previous update
       // 1       1           1       - event and first update
-      
-      _is_link = restore and restore_old;
+   
+      if (restore and restore_old)
+        {
+          _is_link = 1;
+//        _is_use  = 1; // already set
+        }
+      else
+        {
+//        _is_link = 0; // already unset
+          _is_use  = 0;
+        }
+        
     }
 
@@ -73 +79 @@
 
       if (restore)
-        _is_link = 0;
+        {
+          // test if is the actual mapping (in RAT)
+          if (_is_link)
+            _is_use = 0;
 
-      // in all case
-//    _is_valid = 1;
+          _is_link = 0;
+        }
     }
 
@@ -84 +93 @@
     }
 
-//   public : bool can_insert_read (uint32_t max_reader)
-//     {
-//    return ((_counter+1) < max_reader);
-//     }
-
   public : bool can_free (void)
     {
       return ((_is_free  == 0) and
-              (_is_link  == 0) // and
-//            (_is_valid == 1) and // if is_link <- 0, then retire_write_old or reset
-//            (_counter  == 0)
-              );
+              (_is_link  == 0) and
+              (_is_use   == 0));
     }
 
@@ -102 +104 @@
     {
       output << x._is_free  << " "
-             << x._is_link  // << " "
-//           << x._is_valid  << " "
-//              << x._counter
-        ;
+             << x._is_link  << " "
+             << x._is_use ;
       
       return output;