1 | /* |
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2 | * $Id: Parameters.cpp 146 2011-02-01 20:57:54Z rosiere $ |
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3 | * |
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4 | * [ Description ] |
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5 | * |
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6 | */ |
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7 | |
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8 | #include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/include/Parameters.h" |
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9 | #include "Common/include/BitManipulation.h" |
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10 | |
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11 | namespace morpheo { |
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12 | namespace behavioural { |
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13 | namespace core { |
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14 | namespace multi_front_end { |
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15 | namespace front_end { |
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16 | namespace prediction_unit { |
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17 | namespace direction { |
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18 | namespace meta_predictor { |
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19 | namespace two_level_branch_predictor { |
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20 | |
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21 | |
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22 | #undef FUNCTION |
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23 | #define FUNCTION "Two_Level_Branch_Predictor::Parameters" |
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24 | Parameters::Parameters (uint32_t nb_inst_predict , |
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25 | uint32_t nb_inst_update , |
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26 | uint32_t size_address , |
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27 | bool have_bht , |
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28 | uint32_t bht_size_shifter , |
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29 | uint32_t bht_nb_shifter , |
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30 | bool have_pht , |
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31 | uint32_t pht_size_counter , |
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32 | uint32_t pht_nb_counter , |
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33 | uint32_t pht_size_address_share, |
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34 | Tpht_scheme_t pht_scheme , |
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35 | bool update_on_prediction , |
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36 | bool is_toplevel) |
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37 | { |
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38 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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39 | |
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40 | _nb_inst_predict = nb_inst_predict ; |
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41 | _nb_inst_update = nb_inst_update ; |
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42 | _size_address = size_address ; |
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43 | _have_bht = have_bht ; |
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44 | _bht_size_shifter = (have_bht)?(bht_size_shifter):0; |
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45 | _bht_nb_shifter = (have_bht)?(bht_nb_shifter ):0; |
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46 | _have_pht = have_pht ; |
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47 | _pht_size_counter = (have_pht)?(pht_size_counter):0; |
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48 | _pht_nb_counter = (have_pht)?(pht_nb_counter ):0; |
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49 | _pht_size_address_share = (have_bht and have_pht)?(pht_size_address_share):0; |
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50 | _pht_scheme = pht_scheme ; |
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51 | _update_on_prediction = update_on_prediction ; |
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52 | |
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53 | _bht_size_address = (_have_bht)?log2(_bht_nb_shifter):0; |
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54 | _pht_size_address = (_have_pht)?log2(_pht_nb_counter):0; |
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55 | |
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56 | test(); |
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57 | |
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58 | // history to update_prediction_table : |
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59 | // MSB : pht_history |
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60 | // LSB : bht_history |
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61 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_bht : %d",_have_bht ); |
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62 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_size_shifter : %d",_bht_size_shifter); |
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63 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_nb_shifter : %d",_bht_nb_shifter ); |
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64 | |
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65 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _have_pht : %d",_have_pht ); |
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66 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_counter : %d",_pht_size_counter); |
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67 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_counter : %d",_pht_nb_counter ); |
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68 | |
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69 | _size_history = _bht_size_shifter + _pht_size_counter; |
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70 | _bht_history_mask = gen_mask<Thistory_t>(_bht_size_shifter); |
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71 | _bht_history_shift = 0; |
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72 | _pht_history_mask = gen_mask<Thistory_t>(_pht_size_counter); |
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73 | _pht_history_shift = _bht_size_shifter; |
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74 | |
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75 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _size_history : %d",_size_history ); |
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76 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_mask : 0x%llx",_bht_history_mask ); |
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77 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_history_shift : %lld",_bht_history_shift ); |
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78 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_mask : 0x%llx",_pht_history_mask ); |
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79 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_history_shift : %lld",_pht_history_shift ); |
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80 | |
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81 | _bht_init_take = static_cast<Thistory_t>(-1)&_bht_history_mask; |
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82 | _bht_init_ntake = 0; |
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83 | _pht_init_take = (1<<(_pht_size_counter-1)); // size = 4 : 1000/2 |
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84 | _pht_init_ntake = _pht_init_take-1; // size = 4 : 0111/2 |
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85 | |
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86 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_take : 0x%llx",_bht_init_take ); |
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87 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_init_ntake : 0x%llx",_bht_init_ntake); |
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88 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_take : 0x%llx",_pht_init_take ); |
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89 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_init_ntake : 0x%llx",_pht_init_ntake); |
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90 | |
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91 | if (_have_bht) |
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92 | { |
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93 | _bht_address_mask = gen_mask<Taddress_t>(_bht_size_address); |
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94 | |
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95 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _bht_address_mask : 0x%x",_bht_address_mask ); |
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96 | } |
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97 | |
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98 | if (_have_pht) |
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99 | { |
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100 | _pht_counter_max = (1<<_pht_size_counter)-1; |
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101 | _pht_threshold_up = (1<<(_pht_size_counter-1))+1; |
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102 | _pht_threshold_down = (1<<(_pht_size_counter-1))-1; |
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103 | |
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104 | _pht_size_bank = (_have_bht)?(1<<_bht_size_shifter):1; |
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105 | _pht_nb_bank = _pht_nb_counter / _pht_size_bank; |
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106 | |
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107 | // -------->| |
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108 | // +---+ | |
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109 | // | | |---> |
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110 | // ---> --->| |
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111 | // | | | |
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112 | // +---+ |
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113 | // |
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114 | |
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115 | _pht_address_share_mask = gen_mask<Taddress_t>(_pht_size_address_share); |
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116 | _pht_address_share_shift = _bht_size_shifter-_pht_size_address_share; |
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117 | _pht_address_bank_mask = gen_mask<Taddress_t>(log2(_pht_nb_bank)); |
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118 | _pht_address_bank_shift = _pht_size_address_share; |
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119 | |
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120 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_nb_bank : %d" ,_pht_nb_bank ); |
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121 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_size_bank : %d" ,_pht_size_bank ); |
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122 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_mask : 0x%x",_pht_address_share_mask ); |
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123 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_share_shift : %d" ,_pht_address_share_shift ); |
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124 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_mask : 0x%x",_pht_address_bank_mask ); |
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125 | log_printf(TRACE,Two_Level_Branch_Predictor,FUNCTION," * _pht_address_bank_shift : %d" ,_pht_address_bank_shift ); |
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126 | } |
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127 | |
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128 | if (is_toplevel) |
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129 | copy(); |
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130 | |
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131 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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132 | }; |
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133 | |
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134 | // #undef FUNCTION |
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135 | // #define FUNCTION "Two_Level_Branch_Predictor::Parameters (copy)" |
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136 | // Parameters::Parameters (Parameters & param) |
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137 | // { |
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138 | // log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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139 | // test(); |
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140 | // log_end(Two_Level_Branch_Predictor,FUNCTION); |
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141 | // }; |
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142 | |
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143 | #undef FUNCTION |
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144 | #define FUNCTION "Two_Level_Branch_Predictor::~Parameters" |
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145 | Parameters::~Parameters (void) |
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146 | { |
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147 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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148 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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149 | }; |
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150 | |
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151 | #undef FUNCTION |
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152 | #define FUNCTION "Two_Level_Branch_Predictor::copy" |
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153 | void Parameters::copy (void) |
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154 | { |
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155 | log_begin(Two_Level_Branch_Predictor,FUNCTION); |
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156 | log_end(Two_Level_Branch_Predictor,FUNCTION); |
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157 | }; |
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158 | |
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159 | }; // end namespace two_level_branch_predictor |
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160 | }; // end namespace meta_predictor |
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161 | }; // end namespace direction |
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162 | }; // end namespace prediction_unit |
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163 | }; // end namespace front_end |
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164 | }; // end namespace multi_front_end |
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165 | }; // end namespace core |
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166 | |
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167 | }; // end namespace behavioural |
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168 | }; // end namespace morpheo |
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