source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Meta_Predictor_Glue/src/Meta_Predictor_Glue_genMealy_predict.cpp @ 111

Last change on this file since 111 was 111, checked in by rosiere, 15 years ago

1) Decod_queue : multi implementation (one_fifo, multi_fifo)
2) Issue_queue : multi implementation (in_order, out_of_order)
3) Direction : Add Meta predictor
4) Context_State : re add Branch_complete, More priority to Load miss (is not speculative)
5) Return_Address_Stack : update reg_PREDICT pointer on decod miss prediction
6) UPT : Fix bug in multi event
7) Prediction_glue : in read_stack case, insert in UPT pc_next
8) Rename select : when rob have an event (need flush), read_r{a,b,c} and write_r{d,e} is set at 0
  • Property svn:keywords set to Id
File size: 3.6 KB
Line 
1#ifdef SYSTEMC
2/*
3 * $Id: Meta_Predictor_Glue_genMealy_predict.cpp 111 2009-02-27 18:37:40Z rosiere $
4 *
5 * [ Description ]
6 *
7 */
8
9#include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Meta_Predictor_Glue/include/Meta_Predictor_Glue.h"
10
11namespace morpheo                    {
12namespace behavioural {
13namespace core {
14namespace multi_front_end {
15namespace front_end {
16namespace prediction_unit {
17namespace direction {
18namespace meta_predictor {
19namespace meta_predictor_glue {
20
21
22#undef  FUNCTION
23#define FUNCTION "Meta_Predictor_Glue::genMealy_predict"
24  void Meta_Predictor_Glue::genMealy_predict (void)
25  {
26    log_begin(Meta_Predictor_Glue,FUNCTION);
27    log_function(Meta_Predictor_Glue,FUNCTION,_name.c_str());
28
29    for (uint32_t i=0; i<_param->_nb_inst_predict; ++i)
30      {
31        Thistory_t history  ;
32        Tcontrol_t direction;
33
34        switch (_param->_nb_predictor)
35          {
36          case 1 :
37            {
38              history   = PORT_READ(in_PREDICT_PREDICTOR_HISTORY   [0][i]);
39              direction = PORT_READ(in_PREDICT_PREDICTOR_DIRECTION [0][i]);
40
41              if (_param->_predictor_update_on_prediction [0])
42                {
43                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION_VAL [0][i],true     );
44                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION     [0][i],direction);
45                }
46              break;
47            }
48          case 3 :
49            {
50              Thistory_t history_0   = PORT_READ(in_PREDICT_PREDICTOR_HISTORY   [0][i]);
51              Thistory_t history_1   = PORT_READ(in_PREDICT_PREDICTOR_HISTORY   [1][i]);
52              Thistory_t history_2   = PORT_READ(in_PREDICT_PREDICTOR_HISTORY   [2][i]);
53              Tcontrol_t direction_0 = PORT_READ(in_PREDICT_PREDICTOR_DIRECTION [0][i]);
54              Tcontrol_t direction_1 = PORT_READ(in_PREDICT_PREDICTOR_DIRECTION [1][i]);
55              Tcontrol_t direction_2 = PORT_READ(in_PREDICT_PREDICTOR_DIRECTION [2][i]);
56
57              history   = ((history_0 <<_param->_predictor_history_shift [0]) |
58                           (history_1 <<_param->_predictor_history_shift [1]) |
59                           (history_2 <<_param->_predictor_history_shift [2]));
60
61              direction = ((    direction_2 and direction_1) or
62                           (not direction_2 and direction_0));
63             
64              if (_param->_predictor_update_on_prediction [0])
65                {
66                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION_VAL [0][i],direction_2 == 0);
67                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION     [0][i],direction);
68                }
69              if (_param->_predictor_update_on_prediction [1])
70                {
71                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION_VAL [1][i],direction_2 == 1);
72                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION     [1][i],direction);
73                }
74              if (_param->_predictor_update_on_prediction [2])
75                {
76                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION_VAL [2][i],true);
77                  PORT_WRITE(out_PREDICT_PREDICTOR_DIRECTION     [2][i],direction_2);
78                }
79             
80              break;
81            }
82          default :
83            { 
84              break;
85            }
86          }
87
88        PORT_WRITE(out_PREDICT_HISTORY   [i],history  );
89        PORT_WRITE(out_PREDICT_DIRECTION [i],direction);
90      }
91
92    log_end(Meta_Predictor_Glue,FUNCTION);
93  };
94
95}; // end namespace meta_predictor_glue
96}; // end namespace meta_predictor
97}; // end namespace direction
98}; // end namespace prediction_unit
99}; // end namespace front_end
100}; // end namespace multi_front_end
101}; // end namespace core
102
103}; // end namespace behavioural
104}; // end namespace morpheo             
105#endif
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