source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/src/Parameters.cpp @ 115

Last change on this file since 115 was 115, checked in by rosiere, 15 years ago

1) Write queue with mealy
2) Network : fix bug
3) leak memory
  • Property svn:keywords set to Id
File size: 7.2 KB
Line 
1/*
2 * $Id: Parameters.cpp 115 2009-04-20 21:29:17Z rosiere $
3 *
4 * [ Description ]
5 *
6 */
7
8#include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/include/Parameters.h"
9#include "Common/include/BitManipulation.h"
10
11namespace morpheo {
12namespace behavioural {
13namespace core {
14namespace multi_front_end {
15namespace front_end {
16namespace prediction_unit {
17namespace direction {
18namespace meta_predictor {
19namespace two_level_branch_predictor {
20
21
22#undef  FUNCTION
23#define FUNCTION "Two_Level_Branch_Predictor::Parameters"
24  Parameters::Parameters (uint32_t nb_inst_predict       ,
25                          uint32_t nb_inst_update        ,
26                          uint32_t size_address          ,
27                          bool     have_bht              ,
28                          uint32_t bht_size_shifter      ,
29                          uint32_t bht_nb_shifter        ,
30                          bool     have_pht              ,
31                          uint32_t pht_size_counter      ,
32                          uint32_t pht_nb_counter        ,
33                          uint32_t pht_size_address_share,
34                          bool     update_on_prediction  ,
35                          bool is_toplevel)
36  {
37    log_begin(Two_Level_Branch_Predictor,FUNCTION);
38
39    _nb_inst_predict         = nb_inst_predict       ;
40    _nb_inst_update          = nb_inst_update        ;
41    _size_address            = size_address          ;
42    _have_bht                = have_bht              ;
43    _bht_size_shifter        = (have_bht)?(bht_size_shifter):0;
44    _bht_nb_shifter          = (have_bht)?(bht_nb_shifter  ):0;
45    _have_pht                = have_pht              ;
46    _pht_size_counter        = (have_pht)?(pht_size_counter):0;
47    _pht_nb_counter          = (have_pht)?(pht_nb_counter  ):0;
48    _pht_size_address_share  = (have_bht and have_pht)?(pht_size_address_share):0;
49    _update_on_prediction    = update_on_prediction  ;
50                             
51    _bht_size_address        = (_have_bht)?log2(_bht_nb_shifter):0;
52    _pht_size_address        = (_have_pht)?log2(_pht_nb_counter):0;
53                             
54    test();                 
55
56    // history to update_prediction_table :
57    //  MSB : pht_history
58    //  LSB : bht_history
59    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _have_bht                 : %d",_have_bht        );
60    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_size_shifter         : %d",_bht_size_shifter);
61    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_nb_shifter           : %d",_bht_nb_shifter  );
62
63    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _have_pht                 : %d",_have_pht        );
64    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_size_counter         : %d",_pht_size_counter);
65    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_nb_counter           : %d",_pht_nb_counter  );
66                       
67    _size_history            = _bht_size_shifter + _pht_size_counter;
68    _bht_history_mask        = gen_mask<Thistory_t>(_bht_size_shifter);
69    _bht_history_shift       = 0;
70    _pht_history_mask        = gen_mask<Thistory_t>(_pht_size_counter);
71    _pht_history_shift       = _bht_size_shifter;
72                             
73    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _size_history             : %d",_size_history  );
74    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_history_mask         : 0x%x",_bht_history_mask  );
75    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_history_shift        : %d",_bht_history_shift );
76    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_history_mask         : 0x%x",_pht_history_mask  );
77    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_history_shift        : %d",_pht_history_shift );
78
79    _bht_init_take           = static_cast<Thistory_t>(-1)&_bht_history_mask;
80    _bht_init_ntake          = 0;
81    _pht_init_take           = (1<<(_pht_size_counter-1)); // size = 4 : 1000/2
82    _pht_init_ntake          = _pht_init_take-1;           // size = 4 : 0111/2
83
84    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_init_take            : 0x%x",_bht_init_take );
85    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_init_ntake           : 0x%x",_bht_init_ntake);
86    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_init_take            : 0x%x",_pht_init_take );
87    log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_init_ntake           : 0x%x",_pht_init_ntake);
88   
89    if (_have_bht)
90      {
91        _bht_address_mask        = gen_mask<Taddress_t>(_bht_size_address);
92
93        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _bht_address_mask         : 0x%x",_bht_address_mask  );
94      }
95
96    if (_have_pht)
97      {
98        _pht_counter_max         = (1<<_pht_size_counter)-1;
99       
100        _pht_size_bank           = (_have_bht)?(1<<_bht_size_shifter):1;
101        _pht_nb_bank             = _pht_nb_counter / _pht_size_bank;
102
103        // -------->|
104        //   +---+  |
105        //   |   |  |--->
106        // ---> --->|
107        //   |   |  |
108        //   +---+
109        //
110
111        _pht_address_share_mask  = gen_mask<Taddress_t>(_pht_size_address_share);
112        _pht_address_share_shift = _bht_size_shifter-_pht_size_address_share;
113        _pht_address_bank_mask   = gen_mask<Taddress_t>(log2(_pht_nb_bank));
114        _pht_address_bank_shift  = _pht_size_address_share;
115
116        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_nb_bank              : %d"  ,_pht_nb_bank   );
117        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_size_bank            : %d"  ,_pht_size_bank );
118        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_address_share_mask   : 0x%x",_pht_address_share_mask  );
119        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_address_share_shift  : %d"  ,_pht_address_share_shift );
120        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_address_bank_mask    : 0x%x",_pht_address_bank_mask   );
121        log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION,"  * _pht_address_bank_shift   : %d"  ,_pht_address_bank_shift  );
122      }
123
124    if (is_toplevel)
125      copy();
126
127    log_end(Two_Level_Branch_Predictor,FUNCTION);
128  };
129 
130// #undef  FUNCTION
131// #define FUNCTION "Two_Level_Branch_Predictor::Parameters (copy)"
132//   Parameters::Parameters (Parameters & param)
133//   {
134//     log_begin(Two_Level_Branch_Predictor,FUNCTION);
135//     test();
136//     log_end(Two_Level_Branch_Predictor,FUNCTION);
137//   };
138
139#undef  FUNCTION
140#define FUNCTION "Two_Level_Branch_Predictor::~Parameters"
141  Parameters::~Parameters (void) 
142  {
143    log_begin(Two_Level_Branch_Predictor,FUNCTION);
144    log_end(Two_Level_Branch_Predictor,FUNCTION);
145  };
146
147#undef  FUNCTION
148#define FUNCTION "Two_Level_Branch_Predictor::copy"
149  void Parameters::copy (void) 
150  {
151    log_begin(Two_Level_Branch_Predictor,FUNCTION);
152    log_end(Two_Level_Branch_Predictor,FUNCTION);
153  };
154
155}; // end namespace two_level_branch_predictor
156}; // end namespace meta_predictor
157}; // end namespace direction
158}; // end namespace prediction_unit
159}; // end namespace front_end
160}; // end namespace multi_front_end
161}; // end namespace core
162
163}; // end namespace behavioural
164}; // end namespace morpheo             
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