1 | #ifdef SYSTEMC |
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2 | /* |
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3 | * $Id: Update_Prediction_Table_transition.cpp 128 2009-06-26 08:43:23Z rosiere $ |
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4 | * |
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5 | * [ Description ] |
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6 | * |
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7 | */ |
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8 | |
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9 | #include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Update_Prediction_Table/include/Update_Prediction_Table.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 update_prediction_table { |
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18 | |
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19 | #undef FUNCTION |
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20 | #define FUNCTION "Update_Prediction_Table::transition" |
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21 | void Update_Prediction_Table::transition (void) |
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22 | { |
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23 | log_begin(Update_Prediction_Table,FUNCTION); |
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24 | log_function(Update_Prediction_Table,FUNCTION,_name.c_str()); |
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25 | |
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26 | if (PORT_READ(in_NRESET) == 0) |
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27 | { |
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28 | // Initialisation |
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29 | |
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30 | reg_UPDATE_PRIORITY = 0; |
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31 | |
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32 | // All pointer is set at 0 |
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33 | for (uint32_t i=0; i<_param->_nb_context; i++) |
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34 | { |
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35 | for (uint32_t j=0; j<_param->_size_ufpt_queue[i]; ++j) |
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36 | { |
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37 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._state = UPDATE_FETCH_PREDICTION_STATE_EMPTY; |
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38 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._condition = 0; // not necessary |
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39 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_src = 0; // not necessary |
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40 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_dest = 0; // not necessary |
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41 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._last_take = 0; // not necessary |
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42 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._is_accurate = 0; // not necessary |
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43 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._history = 0; // not necessary |
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44 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_ras = 0; // not necessary |
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45 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._index_ras = 0; // not necessary |
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46 | } |
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47 | reg_UFPT_BOTTOM [i] = 0; |
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48 | reg_UFPT_TOP [i] = 0; |
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49 | reg_UFPT_UPDATE [i] = 0; |
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50 | reg_UFPT_NB_NEED_UPDATE [i] = 0; |
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51 | reg_UFPT_NB_UPDATE [i] = 0; |
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52 | |
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53 | for (uint32_t j=0; j<_param->_size_upt_queue[i]; ++j) |
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54 | { |
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55 | reg_UPDATE_PREDICTION_TABLE [i][j]._state = UPDATE_PREDICTION_STATE_EMPTY; |
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56 | reg_UPDATE_PREDICTION_TABLE [i][j]._condition = 0; // not necessary |
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57 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_src = 0; // not necessary |
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58 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_dest = 0; // not necessary |
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59 | reg_UPDATE_PREDICTION_TABLE [i][j]._last_take = 0; // not necessary |
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60 | reg_UPDATE_PREDICTION_TABLE [i][j]._good_take = 0; // not necessary |
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61 | reg_UPDATE_PREDICTION_TABLE [i][j]._is_accurate = 0; // not necessary |
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62 | reg_UPDATE_PREDICTION_TABLE [i][j]._history = 0; // not necessary |
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63 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_ras = 0; // not necessary |
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64 | reg_UPDATE_PREDICTION_TABLE [i][j]._index_ras = 0; // not necessary |
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65 | reg_UPDATE_PREDICTION_TABLE [i][j]._ifetch_prediction= 0; // not necessary |
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66 | reg_UPDATE_PREDICTION_TABLE [i][j]._miss_commit = 0; // not necessary |
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67 | reg_UPDATE_PREDICTION_TABLE [i][j]._retire_ok = 0; // not necessary |
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68 | reg_UPDATE_PREDICTION_TABLE [i][j]._miss_prediction = 0; // not necessary |
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69 | } |
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70 | reg_UPT_BOTTOM [i] = 0; |
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71 | reg_UPT_TOP [i] = 0; |
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72 | reg_UPT_TOP_EVENT [i] = 0; |
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73 | reg_UPT_UPDATE [i] = 0; |
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74 | reg_UPT_EMPTY [i] = true; |
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75 | |
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76 | reg_IS_ACCURATE [i] = true; |
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77 | |
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78 | reg_UFPT_EVENT_STATE [i] = UFPT_EVENT_STATE_OK; |
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79 | reg_UPT_EVENT_STATE [i] = UPT_EVENT_STATE_OK; |
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80 | |
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81 | reg_EVENT_UPT_PTR [i] = 0; // not necessary |
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82 | reg_EVENT_UPT_FULL [i] = 0; // not necessary |
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83 | |
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84 | // reg_EVENT_STATE [i] = EVENT_STATE_OK; // not necessary |
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85 | // reg_EVENT_IS_BRANCH [i] = true ; // not necessary |
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86 | |
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87 | reg_EVENT_DEPTH [i] = 0; // not necessary |
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88 | reg_EVENT_ADDRESS_SRC [i] = 0; // not necessary |
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89 | reg_EVENT_ADDRESS_DEST_VAL [i] = 0; // not necessary |
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90 | reg_EVENT_ADDRESS_DEST [i] = 0; // not necessary |
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91 | reg_EVENT_CAN_CONTINUE [i] = 0; // not necessary |
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92 | |
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93 | } |
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94 | } |
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95 | else |
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96 | { |
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97 | bool flush_UFPT [_param->_nb_context]; |
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98 | for (uint32_t i=0; i<_param->_nb_context; i++) |
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99 | { |
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100 | flush_UFPT [i] = false; |
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101 | } |
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102 | |
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103 | // =================================================================== |
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104 | // =====[ GARBAGE COLLECTOR ]========================================= |
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105 | // =================================================================== |
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106 | |
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107 | // Each cycle, if the most lastest branch have update all prediction struction (state = end), free this slot |
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108 | // * Update state -> new status is "empty" |
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109 | // * Update pointer (bottom and accurate) |
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110 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * GARBAGE COLLECTOR (BEGIN)"); |
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111 | for (uint32_t i=0; i<_param->_nb_context; i++) |
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112 | { |
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113 | // ----------------------------- |
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114 | // UPDATE_FETCH_PREDICTION_TABLE |
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115 | // ----------------------------- |
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116 | { |
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117 | uint32_t bottom = reg_UFPT_BOTTOM [i]; |
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118 | bool end = (reg_UPDATE_FETCH_PREDICTION_TABLE [i][bottom]._state == UPDATE_FETCH_PREDICTION_STATE_END); |
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119 | |
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120 | // Test if bottom slot can be remove |
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121 | if (end) |
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122 | { |
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123 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT [%d][%d]",i,bottom); |
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124 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT [%d][%d].state = UPDATE_FETCH_PREDICTION_STATE_EMPTY",i,bottom); |
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125 | |
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126 | // Free slot |
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127 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][bottom]._state = UPDATE_FETCH_PREDICTION_STATE_EMPTY; |
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128 | // Update pointer |
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129 | bottom = (bottom+1)%_param->_size_ufpt_queue[i]; |
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130 | |
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131 | reg_UFPT_BOTTOM [i] = bottom; |
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132 | } |
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133 | } |
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134 | |
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135 | // ----------------------- |
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136 | // UPDATE_PREDICTION_TABLE |
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137 | // ----------------------- |
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138 | { |
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139 | uint32_t bottom = reg_UPT_BOTTOM [i]; |
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140 | |
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141 | // if (reg_UPT_EVENT_STATE [i] == UPT_EVENT_STATE_OK) |
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142 | { |
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143 | bool end = (reg_UPDATE_PREDICTION_TABLE [i][bottom]._state == UPDATE_PREDICTION_STATE_END); |
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144 | |
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145 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_BOTTOM (before) : %d",bottom); |
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146 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * state is STATE_END : %d",end); |
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147 | |
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148 | if (end) |
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149 | { |
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150 | #if defined(DEBUG) and defined(DEBUG_Update_Prediction_Table) and (DEBUG_Update_Prediction_Table == true) |
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151 | if (reg_UPDATE_PREDICTION_TABLE [i][bottom]._retire_ok) |
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152 | { |
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153 | uint32_t num_thread = _param->_translate_num_context_to_num_thread [i]; |
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154 | branchement_log_file [num_thread] |
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155 | << std::hex |
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156 | << "0x" << std::setfill('0') << std::setw(_param->_size_general_data/4) << reg_UPDATE_PREDICTION_TABLE [i][bottom]._address_src << " " |
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157 | << "0x" << std::setfill('0') << std::setw(_param->_size_general_data/4) << reg_UPDATE_PREDICTION_TABLE [i][bottom]._address_dest << " " |
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158 | << std::dec |
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159 | << reg_UPDATE_PREDICTION_TABLE [i][bottom]._good_take << " - " |
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160 | << "[" << simulation_cycle() << "] " << " " |
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161 | << reg_UPDATE_PREDICTION_TABLE [i][bottom]._miss_prediction << " " |
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162 | << reg_UPDATE_PREDICTION_TABLE [i][bottom]._ifetch_prediction << " " |
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163 | << "(" << toString(reg_UPDATE_PREDICTION_TABLE [i][bottom]._condition) << ")" |
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164 | << std::endl; |
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165 | } |
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166 | #endif |
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167 | |
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168 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d]",i,bottom); |
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169 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d]._state = UPDATE_PREDICTION_STATE_EMPTY",i,bottom); |
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170 | // Free slot |
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171 | reg_UPDATE_PREDICTION_TABLE [i][bottom]._state = UPDATE_PREDICTION_STATE_EMPTY; |
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172 | |
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173 | // Update pointer |
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174 | reg_UPT_BOTTOM [i] = (bottom+1)%_param->_size_upt_queue[i]; |
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175 | |
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176 | // Free a slot, test if bottom pointer overtake the top pointer |
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177 | if (reg_UPT_BOTTOM [i] == reg_UPT_TOP [i]) |
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178 | reg_UPT_EMPTY [i] = true; // free a slot |
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179 | |
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180 | reg_EVENT_UPT_FULL [i] = false; |
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181 | } |
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182 | |
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183 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_BOTTOM (after ) : %d",reg_UPT_BOTTOM [i]); |
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184 | } |
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185 | } |
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186 | } |
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187 | |
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188 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * GARBAGE COLLECTOR (END)"); |
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189 | |
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190 | // =================================================================== |
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191 | // =====[ PREDICT ]=================================================== |
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192 | // =================================================================== |
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193 | |
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194 | // An ifetch_unit compute next cycle and have an branch : predict_val is set |
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195 | // * Alloc new entry -> new status is "wait decod" |
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196 | // * Save input (to restore in miss or error) |
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197 | // * Update pointer |
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198 | |
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199 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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200 | // Test if have a transaction |
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201 | if (PORT_READ(in_PREDICT_VAL[i]) and internal_PREDICT_ACK [i]) |
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202 | { |
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203 | // get transaction information |
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204 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_PREDICT_CONTEXT_ID [i]):0; |
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205 | uint32_t top = internal_PREDICT_UPDATE_PREDICTION_ID [i]; |
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206 | Tbranch_condition_t condition = PORT_READ(in_PREDICT_BTB_CONDITION [i]); |
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207 | bool is_accurate = (_param->_always_accurate_predict or |
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208 | (_param->_can_accurate_predict and PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i]))); |
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209 | |
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210 | |
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211 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * PREDICT[%d] - Accepted",i); |
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212 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
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213 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * top : %d",top); |
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214 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * condition : %d",condition); |
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215 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * is_accurate : %d",is_accurate); |
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216 | |
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217 | #ifdef DEBUG_TEST |
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218 | if (reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state != UPDATE_FETCH_PREDICTION_STATE_EMPTY) |
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219 | throw ERRORMORPHEO(FUNCTION,_("Predict : invalid state.")); |
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220 | #endif |
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221 | |
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222 | // Ifetch unit have fetch an instruction bundle with a branchement. |
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223 | // Insert in UFPT |
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224 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT [%d][%d].state <- UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD (predict)",context,top); |
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225 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state = UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD; |
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226 | |
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227 | // Write information |
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228 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._condition = condition; |
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229 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._address_src = PORT_READ(in_PREDICT_BTB_ADDRESS_SRC [i]); |
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230 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._address_dest = PORT_READ(in_PREDICT_BTB_ADDRESS_DEST [i]); |
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231 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._last_take = PORT_READ(in_PREDICT_BTB_LAST_TAKE [i]); |
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232 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._is_accurate = is_accurate; |
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233 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._history = (_param->_have_port_history)?PORT_READ(in_PREDICT_DIR_HISTORY [i]):0; |
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234 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._address_ras = PORT_READ(in_PREDICT_RAS_ADDRESS [i]); |
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235 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._index_ras = PORT_READ(in_PREDICT_RAS_INDEX [i]); |
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236 | |
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237 | // Update pointer |
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238 | reg_UFPT_TOP [context] = (top+1)%_param->_size_ufpt_queue [context]; |
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239 | |
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240 | // Test if this branchement need update |
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241 | if (need_update(condition)) |
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242 | { |
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243 | reg_UFPT_NB_NEED_UPDATE [context] ++; |
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244 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE (after) : %d",reg_UFPT_NB_NEED_UPDATE [context]); |
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245 | } |
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246 | } |
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247 | |
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248 | // =================================================================== |
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249 | // =====[ DECOD ]===================================================== |
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250 | // =================================================================== |
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251 | |
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252 | |
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253 | // An decod is detected by decod stage |
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254 | // 1) Hit prediction : The instruction bundle have a branch predicted in ifetch stage and it is this branch |
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255 | // * Update state, wait_decod -> wait_end |
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256 | // * Pop ufpt -> push upt |
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257 | // * Update accurate register : if the predict stage have tagged this branch as not accurate, stop decod |
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258 | // 2) Miss : The instruction bundle have a branch but it is not predicted |
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259 | // * Flush ufpt |
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260 | // * decod information is write in upt |
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261 | |
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262 | for (uint32_t i=0; i<_param->_nb_inst_decod; i++) |
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263 | // Test if have a decod transaction |
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264 | if (PORT_READ(in_DECOD_VAL[i]) and internal_DECOD_ACK [i]) |
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265 | { |
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266 | // Read information |
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267 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_DECOD_CONTEXT_ID [i]):0; |
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268 | Tcontrol_t miss_ifetch = PORT_READ(in_DECOD_MISS_IFETCH [i]); |
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269 | Tcontrol_t miss_decod = PORT_READ(in_DECOD_MISS_DECOD [i]); |
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270 | uint32_t upt_ptr_write = internal_DECOD_UPT_PTR_WRITE [i]; |
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271 | uint32_t top_next = (upt_ptr_write+1)%_param->_size_upt_queue [context]; |
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272 | Tbranch_condition_t condition ; |
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273 | Tcontrol_t is_accurate; |
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274 | Taddress_t address_src = PORT_READ(in_DECOD_BTB_ADDRESS_SRC [i]); |
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275 | Taddress_t address_dest = PORT_READ(in_DECOD_BTB_ADDRESS_DEST [i]); |
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276 | Tcontrol_t direction = PORT_READ(in_DECOD_BTB_LAST_TAKE [i]); |
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277 | |
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278 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * DECOD[%d] - Accepted",i); |
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279 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
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280 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss_ifetch : %d",miss_ifetch); |
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281 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss_decod : %d",miss_decod); |
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282 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * upt_ptr_write : %d",upt_ptr_write); |
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283 | |
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284 | // In decod step, two miss type : |
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285 | // miss_ifetch = branch is previously predict (predict interface), but it's not the good |
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286 | // miss_decod = branch was not detected |
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287 | if (not (miss_ifetch or miss_decod)) |
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288 | { |
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289 | // Normal case : branch is previous predicted, change state of branch |
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290 | |
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291 | // Read ufpt_ptr (send in predic step) |
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292 | uint32_t ufpt_ptr_read = (_param->_have_port_depth)?PORT_READ(in_DECOD_UPDATE_PREDICTION_ID [i]):0; |
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293 | |
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294 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ufpt_ptr_read : %d",ufpt_ptr_read); |
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295 | |
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296 | #ifdef DEBUG_TEST |
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297 | if (reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._state != UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD) |
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298 | throw ERRORMORPHEO(FUNCTION,_("Decod : invalid ufpt state.")); |
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299 | #endif |
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300 | // Change state |
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301 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT [%d][%d].state <- UPDATE_FETCH_PREDICTION_STATE_END (decod - hit)",context,ufpt_ptr_read); |
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302 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._state = UPDATE_FETCH_PREDICTION_STATE_END; |
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303 | |
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304 | // Push upt (from Pop ufpt) |
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305 | condition = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._condition; |
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306 | is_accurate = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._is_accurate; |
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307 | |
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308 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._condition = condition; |
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309 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_src = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._address_src ; |
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310 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_dest = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._address_dest; |
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311 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._last_take = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._last_take ; |
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312 | // reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._good_take; |
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313 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._is_accurate = is_accurate; |
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314 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._history = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._history ; |
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315 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_ras = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._address_ras ; |
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316 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._index_ras = reg_UPDATE_FETCH_PREDICTION_TABLE [context][ufpt_ptr_read]._index_ras ; |
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317 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._ifetch_prediction = true ; // prediction from ifetch |
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318 | |
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319 | // Update pointer (now, this instruction is not in ufpt) |
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320 | if (need_update(condition)) |
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321 | { |
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322 | reg_UFPT_NB_NEED_UPDATE [context] --; |
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323 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE (after) : %d",reg_UFPT_NB_NEED_UPDATE [context]); |
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324 | } |
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325 | } |
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326 | else |
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327 | { |
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328 | // Have a miss !!! |
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329 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss !!!"); |
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330 | |
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331 | condition = PORT_READ(in_DECOD_BTB_CONDITION [i]); |
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332 | is_accurate = (_param->_always_accurate_decod or |
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333 | (_param->_can_accurate_decod and PORT_READ(in_DECOD_IS_ACCURATE [i]))); |
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334 | |
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335 | // if can_continue, don't wait the end of all instruction |
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336 | // (can_continue = not miss_commit and the destination is accurate (know)) |
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337 | Tcontrol_t can_continue = is_accurate; |
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338 | |
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339 | #ifdef DEBUG_TEST |
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340 | if (reg_UPT_EVENT_STATE [context] != UPT_EVENT_STATE_OK) |
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341 | throw ERRORMORPHEO(FUNCTION,_("Decod : invalid upt event state.")); |
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342 | if (reg_UFPT_EVENT_STATE [context] != UFPT_EVENT_STATE_OK) |
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343 | throw ERRORMORPHEO(FUNCTION,_("Decod : invalid ufpt event state.")); |
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344 | #endif |
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345 | |
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346 | // miss_ifetch -> need flush ufpt |
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347 | // miss_decod -> not necessary |
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348 | // if can_continue (destination is know) and direction is not take (instruction in ifetch_queue can be valid) |
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349 | bool flush_ufpt = (not (can_continue and not direction and not miss_ifetch)); |
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350 | |
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351 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * can_continue: %d",can_continue); |
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352 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * direction : %d",direction ); |
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353 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss_ifetch : %d",miss_ifetch ); |
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354 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * flush_ufpt: %d",flush_ufpt ); |
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355 | |
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356 | // Test if can continue without flushing the ufpt (and ifetch_queue) |
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357 | if (flush_ufpt) |
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358 | { |
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359 | // // Optimisation : Test if ufpt have entry that need update prediction struction (as Return Address Stack) |
---|
360 | // if (reg_UFPT_NB_NEED_UPDATE [context] == 0) |
---|
361 | // { |
---|
362 | // // Change state |
---|
363 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT_EVENT [%d] <- UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT (decod - miss - no flush ufpt)",context); |
---|
364 | // reg_UPT_EVENT_STATE [context] = UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT; |
---|
365 | |
---|
366 | // // @@@ |
---|
367 | // // // Have an actual event ? |
---|
368 | // // if (not reg_EVENT_VAL [context]) |
---|
369 | // // reg_EVENT_UPT_PTR [context] = upt_ptr_write; |
---|
370 | // } |
---|
371 | // else |
---|
372 | // { |
---|
373 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT [%d] <- UPT_EVENT_STATE_KO_MISS_WAIT_UFPT (decod - miss - flush ufpt)",context); |
---|
374 | // // just wait ufpt, don't flush upt |
---|
375 | // reg_UPT_EVENT_STATE [context] = UPT_EVENT_STATE_KO_MISS_WAIT_UFPT; |
---|
376 | // } |
---|
377 | |
---|
378 | reg_UPT_EVENT_STATE [context] = UPT_EVENT_STATE_KO_DECODE_UPDATE_CONTEXT; |
---|
379 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT_EVENT_STATE [%d] <- %s (decod, miss)",context,toString(reg_UPT_EVENT_STATE [context]).c_str()); |
---|
380 | |
---|
381 | // Need Flush UPFT |
---|
382 | flush_UFPT [context] = true; |
---|
383 | |
---|
384 | // Write information |
---|
385 | // reg_EVENT_IS_BRANCH [context] = true; |
---|
386 | reg_EVENT_DEPTH [context] = upt_ptr_write; |
---|
387 | reg_EVENT_ADDRESS_SRC [context] = address_src; // delay_slot is compute in Context_State |
---|
388 | reg_EVENT_ADDRESS_DEST_VAL[context] = direction; |
---|
389 | reg_EVENT_ADDRESS_DEST [context] = address_dest; |
---|
390 | reg_EVENT_CAN_CONTINUE [context] = can_continue; |
---|
391 | } |
---|
392 | // else can continue |
---|
393 | |
---|
394 | // Push upt (from decod interface) |
---|
395 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._condition = condition; |
---|
396 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_src = address_src ; |
---|
397 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_dest = address_dest; |
---|
398 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._last_take = direction ; |
---|
399 | // reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._good_take; |
---|
400 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._is_accurate = is_accurate; |
---|
401 | // reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._history = ; // static prediction |
---|
402 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._address_ras = PORT_READ(in_DECOD_RAS_ADDRESS [i]); |
---|
403 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._index_ras = PORT_READ(in_DECOD_RAS_INDEX [i]); |
---|
404 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._ifetch_prediction = false; // static prediction |
---|
405 | } |
---|
406 | |
---|
407 | // In all case !!! |
---|
408 | #ifdef DEBUG_TEST |
---|
409 | if (reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._state != UPDATE_PREDICTION_STATE_EMPTY) |
---|
410 | throw ERRORMORPHEO(FUNCTION,_("Decod : invalid upt state.")); |
---|
411 | #endif |
---|
412 | |
---|
413 | // Change state |
---|
414 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_WAIT_END (decod - hit)",context,upt_ptr_write); |
---|
415 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._state = UPDATE_PREDICTION_STATE_WAIT_END; |
---|
416 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._retire_ok = false; |
---|
417 | reg_UPDATE_PREDICTION_TABLE [context][upt_ptr_write]._miss_commit = false; |
---|
418 | |
---|
419 | // Write new accurate |
---|
420 | #ifdef DEBUG_TEST |
---|
421 | if (not reg_IS_ACCURATE [context] and not is_accurate) |
---|
422 | throw ERRORMORPHEO(FUNCTION,_("Decod : invalid accurate flag.")); |
---|
423 | #endif |
---|
424 | |
---|
425 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * is_accurate : %d",is_accurate); |
---|
426 | |
---|
427 | reg_IS_ACCURATE [context] = is_accurate; |
---|
428 | |
---|
429 | // Update pointer |
---|
430 | reg_UPT_TOP [context] = top_next; |
---|
431 | reg_UPT_EMPTY [context] = false; // new instruction |
---|
432 | } |
---|
433 | |
---|
434 | // =================================================================== |
---|
435 | // =====[ UPDATE ]==================================================== |
---|
436 | // =================================================================== |
---|
437 | { |
---|
438 | bool can_continue [_param->_nb_context]; |
---|
439 | for (uint32_t i=0; i<_param->_nb_context; ++i) |
---|
440 | can_continue [i] = true; |
---|
441 | |
---|
442 | // For each updated instruction |
---|
443 | for (uint32_t i=0; i<_param->_nb_inst_update; i++) |
---|
444 | { |
---|
445 | Tcontext_t context = internal_UPDATE_CONTEXT_ID [i]; |
---|
446 | |
---|
447 | // Test if transaction |
---|
448 | // (an val_with_out is an update and don't need update prediction structure |
---|
449 | if ((internal_UPDATE_VAL[i] and PORT_READ(in_UPDATE_ACK [i])) or |
---|
450 | (internal_UPDATE_VAL_WITHOUT_ACK [i] and can_continue [context])) |
---|
451 | { |
---|
452 | Tdepth_t depth = internal_UPDATE_DEPTH [i]; |
---|
453 | |
---|
454 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPDATE[%d] - Accepted",i); |
---|
455 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
---|
456 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * depth : %d",depth); |
---|
457 | |
---|
458 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [context]; |
---|
459 | |
---|
460 | // One interface to two source : |
---|
461 | // * from ufpt -> newest prediction |
---|
462 | // * from upt -> oldest prediction |
---|
463 | if (internal_UPDATE_FROM_UFPT [i]) |
---|
464 | { |
---|
465 | // if free a slot, also all queue is updated |
---|
466 | // Last slot ? |
---|
467 | if ((--reg_UFPT_NB_UPDATE [context])==0) |
---|
468 | { |
---|
469 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT_EVENT [%d] <- UFPT_EVENT_STATE_OK (update - end flush ufpt)",context); |
---|
470 | reg_UFPT_EVENT_STATE [context] = UFPT_EVENT_STATE_OK; |
---|
471 | reg_UFPT_NB_NEED_UPDATE [context] = 0; |
---|
472 | |
---|
473 | // // Test upt event to change state |
---|
474 | // // test if upt wait ufpt |
---|
475 | // switch (upt_event_state) |
---|
476 | // { |
---|
477 | // // this case when don't need flush upt (miss decod and can continue) |
---|
478 | // case UPT_EVENT_STATE_KO_MISS_WAIT_UFPT : upt_event_state = UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT; break; |
---|
479 | // case UPT_EVENT_STATE_KO_EVENT_WAIT_UFPT : upt_event_state = UPT_EVENT_STATE_OK ; break; |
---|
480 | // default : break; |
---|
481 | // } |
---|
482 | |
---|
483 | // reg_UPT_EVENT_STATE [context] = upt_event_state; |
---|
484 | } |
---|
485 | |
---|
486 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Update Fetch Prediction Table"); |
---|
487 | |
---|
488 | // Change state |
---|
489 | #ifdef DEBUG_TEST |
---|
490 | if (reg_UPDATE_FETCH_PREDICTION_TABLE [context][depth]._state != UPDATE_FETCH_PREDICTION_STATE_EVENT) |
---|
491 | throw ERRORMORPHEO(FUNCTION,_("Update : invalid ufpt state.")); |
---|
492 | #endif |
---|
493 | |
---|
494 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UFPT [%d][%d].state <- UPDATE_FETCH_PREDICTION_STATE_END (update)",context,depth); |
---|
495 | |
---|
496 | reg_UPDATE_FETCH_PREDICTION_TABLE [context][depth]._state = UPDATE_FETCH_PREDICTION_STATE_END; |
---|
497 | |
---|
498 | // Update pointer |
---|
499 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_UPDATE (before) : %d",reg_UFPT_UPDATE [context]); |
---|
500 | reg_UFPT_UPDATE [context] = ((depth==0)?_param->_size_ufpt_queue[context]:depth)-1; |
---|
501 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_UPDATE (after ) : %d",reg_UFPT_UPDATE [context]); |
---|
502 | } |
---|
503 | else |
---|
504 | { |
---|
505 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Update Prediction Table"); |
---|
506 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_UPDATE (before) : %d",reg_UPT_UPDATE [context]); |
---|
507 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s",toString(upt_event_state).c_str()); |
---|
508 | |
---|
509 | // Change state |
---|
510 | #ifdef DEBUG_TEST |
---|
511 | if (internal_UPDATE_RAS [i]) |
---|
512 | { |
---|
513 | if ((reg_UPDATE_PREDICTION_TABLE [context][depth]._state != UPDATE_PREDICTION_STATE_EVENT) and |
---|
514 | (reg_UPDATE_PREDICTION_TABLE [context][depth]._state != UPDATE_PREDICTION_STATE_KO ) ) |
---|
515 | throw ERRORMORPHEO(FUNCTION,_("Update : invalid upt state.")); |
---|
516 | } |
---|
517 | else |
---|
518 | { |
---|
519 | if (reg_UPDATE_PREDICTION_TABLE [context][depth]._state != UPDATE_PREDICTION_STATE_OK ) |
---|
520 | throw ERRORMORPHEO(FUNCTION,_("Update : invalid upt state.")); |
---|
521 | } |
---|
522 | #endif |
---|
523 | |
---|
524 | #ifdef STATISTICS |
---|
525 | Tbranch_condition_t condition = reg_UPDATE_PREDICTION_TABLE [context][depth]._condition; |
---|
526 | #endif |
---|
527 | bool ok = (reg_UPDATE_PREDICTION_TABLE [context][depth]._state == UPDATE_PREDICTION_STATE_OK); |
---|
528 | bool ko = (reg_UPDATE_PREDICTION_TABLE [context][depth]._state == UPDATE_PREDICTION_STATE_KO); |
---|
529 | |
---|
530 | // Test if branch is valid (prediction can be incorrect) |
---|
531 | if (ok or ko) |
---|
532 | { |
---|
533 | reg_UPDATE_PREDICTION_TABLE [context][depth]._retire_ok = true; |
---|
534 | reg_UPDATE_PREDICTION_TABLE [context][depth]._miss_prediction = ko; |
---|
535 | |
---|
536 | #ifdef STATISTICS |
---|
537 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
538 | { |
---|
539 | if (reg_UPDATE_PREDICTION_TABLE [context][depth]._ifetch_prediction) |
---|
540 | (*_stat_nb_branch_ifetch_prediction [context])++; |
---|
541 | if (reg_UPDATE_PREDICTION_TABLE [context][depth]._is_accurate) |
---|
542 | (*_stat_nb_branch_accurate [context])++; |
---|
543 | } |
---|
544 | #endif |
---|
545 | } |
---|
546 | |
---|
547 | // Have an update, test the state to transiste to the good state |
---|
548 | if (ko) |
---|
549 | { |
---|
550 | // Ko |
---|
551 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_END_KO (update)",context,depth); |
---|
552 | |
---|
553 | // Wait update of context_state |
---|
554 | reg_UPDATE_PREDICTION_TABLE [context][depth]._state = UPDATE_PREDICTION_STATE_END_KO; |
---|
555 | |
---|
556 | reg_EVENT_UPT_PTR [context] = depth; |
---|
557 | |
---|
558 | #ifdef STATISTICS |
---|
559 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
560 | (*_stat_nb_branch_miss [context][condition])++; |
---|
561 | #endif |
---|
562 | } |
---|
563 | else |
---|
564 | { |
---|
565 | // ok or event |
---|
566 | |
---|
567 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_END (update)",context,depth); |
---|
568 | reg_UPDATE_PREDICTION_TABLE [context][depth]._state = UPDATE_PREDICTION_STATE_END; |
---|
569 | |
---|
570 | #ifdef STATISTICS |
---|
571 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
572 | { |
---|
573 | if (ok) |
---|
574 | (*_stat_nb_branch_hit [context][condition]) ++; |
---|
575 | else |
---|
576 | (*_stat_nb_branch_unused [context]) ++; |
---|
577 | } |
---|
578 | #endif |
---|
579 | } |
---|
580 | |
---|
581 | // Test if freeing the branch with no accurate ? |
---|
582 | if ((reg_UPDATE_PREDICTION_TABLE [context][depth]._is_accurate == false) and not ko) |
---|
583 | reg_IS_ACCURATE [context] = true; |
---|
584 | |
---|
585 | // Update pointer |
---|
586 | // * if update RAS : update pointer is decreaste until it equal at top pointer |
---|
587 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * internal_UPDATE_RAS [%d] : %d",i,internal_UPDATE_RAS [i]); |
---|
588 | |
---|
589 | if (internal_UPDATE_RAS [i]) |
---|
590 | { |
---|
591 | // if end_event, restart too bottom, else decrease pointer |
---|
592 | bool end_event = (reg_UPT_UPDATE [context] == reg_UPT_TOP [context]); |
---|
593 | |
---|
594 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * end_event : %d",end_event); |
---|
595 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * bottom : %d",reg_UPT_BOTTOM[context]); |
---|
596 | |
---|
597 | if (end_event) |
---|
598 | { |
---|
599 | reg_UPT_UPDATE [context] = (end_event)?reg_UPT_BOTTOM[context]:(((depth==0)?_param->_size_upt_queue[context]:depth)-1); |
---|
600 | // reg_UPT_UPDATE [context] = reg_UPT_BOTTOM[context]; |
---|
601 | |
---|
602 | switch (upt_event_state) |
---|
603 | { |
---|
604 | // this case when don't need flush upt (miss decod and can continue) |
---|
605 | case UPT_EVENT_STATE_KO_MISS_FLUSH_UPT : upt_event_state = UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT; break; |
---|
606 | case UPT_EVENT_STATE_KO_EVENT_FLUSH_UPT : |
---|
607 | { |
---|
608 | upt_event_state = UPT_EVENT_STATE_OK; |
---|
609 | reg_UPT_TOP [context] = reg_UPT_TOP_EVENT [context]; |
---|
610 | reg_UPT_UPDATE [context] = reg_UPT_TOP_EVENT [context]; |
---|
611 | |
---|
612 | break; |
---|
613 | } |
---|
614 | default : break; |
---|
615 | } |
---|
616 | |
---|
617 | } |
---|
618 | else |
---|
619 | { |
---|
620 | // else, decrease update pointer |
---|
621 | reg_UPT_UPDATE [context] = (((depth==0)?_param->_size_upt_queue[context]:depth)-1); |
---|
622 | } |
---|
623 | } |
---|
624 | else |
---|
625 | { |
---|
626 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * next update"); |
---|
627 | |
---|
628 | // increase pointer |
---|
629 | reg_UPT_UPDATE [context] = (depth+1)%_param->_size_upt_queue[context]; |
---|
630 | } |
---|
631 | |
---|
632 | // special case : |
---|
633 | if ((upt_event_state == UPT_EVENT_STATE_KO_COMMIT_WAIT_END_UPDATE) and |
---|
634 | (reg_UPT_UPDATE [context] == reg_EVENT_UPT_PTR [context])) |
---|
635 | { |
---|
636 | reg_UPT_TOP [context] = reg_UPT_TOP_EVENT [context]; |
---|
637 | reg_UPT_UPDATE [context] = reg_UPT_TOP_EVENT [context]; |
---|
638 | reg_IS_ACCURATE [context] = true; |
---|
639 | |
---|
640 | upt_event_state = UPT_EVENT_STATE_OK; |
---|
641 | } |
---|
642 | |
---|
643 | reg_UPT_EVENT_STATE [context] = upt_event_state; |
---|
644 | |
---|
645 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_UPDATE (after ) : %d",reg_UPT_UPDATE[context]); |
---|
646 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s",toString(reg_UPT_EVENT_STATE [context]).c_str()); |
---|
647 | } |
---|
648 | } |
---|
649 | else |
---|
650 | can_continue [context] = false; |
---|
651 | } |
---|
652 | |
---|
653 | // Round robin |
---|
654 | reg_UPDATE_PRIORITY = (reg_UPDATE_PRIORITY+1)%_param->_nb_context; |
---|
655 | } |
---|
656 | |
---|
657 | // =================================================================== |
---|
658 | // =====[ BRANCH_COMPLETE ]=========================================== |
---|
659 | // =================================================================== |
---|
660 | |
---|
661 | // The branch is complete |
---|
662 | // * Hit prediction : |
---|
663 | // * update status |
---|
664 | // * Miss prediction : |
---|
665 | { |
---|
666 | bool branch_complete_miss [_param->_nb_context]; |
---|
667 | for (uint32_t i=0; i<_param->_nb_context; ++i) |
---|
668 | branch_complete_miss [i] = false; |
---|
669 | |
---|
670 | for (uint32_t i=0; i<_param->_nb_inst_branch_complete; i++) |
---|
671 | if (PORT_READ(in_BRANCH_COMPLETE_VAL[i]) and internal_BRANCH_COMPLETE_ACK [i]) |
---|
672 | { |
---|
673 | // Read information |
---|
674 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_BRANCH_COMPLETE_CONTEXT_ID [i]):0; |
---|
675 | Tdepth_t depth = (_param->_have_port_depth )?PORT_READ(in_BRANCH_COMPLETE_DEPTH [i]):0; |
---|
676 | Tcontrol_t miss = internal_BRANCH_COMPLETE_MISS_PREDICTION [i]; |
---|
677 | Tcontrol_t good_take = internal_BRANCH_COMPLETE_TAKE [i]; |
---|
678 | Taddress_t good_addr = internal_BRANCH_COMPLETE_ADDRESS_DEST [i]; |
---|
679 | |
---|
680 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [context]; |
---|
681 | |
---|
682 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_COMPLETE[%d] - Accepted",i); |
---|
683 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
---|
684 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * depth : %d",depth); |
---|
685 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss : %d",miss); |
---|
686 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s",toString(upt_event_state).c_str()); |
---|
687 | |
---|
688 | // Test if the completed branch is a speculation miss |
---|
689 | if (miss) |
---|
690 | { |
---|
691 | // special case : two branch complete on the same context. |
---|
692 | // when the re order keep the order, the branch complete j is most speculative that the branch comple i if i < j |
---|
693 | if (not branch_complete_miss [context]) |
---|
694 | { |
---|
695 | branch_complete_miss [context] = true; |
---|
696 | // Flush UPT |
---|
697 | // get information |
---|
698 | uint32_t top = reg_UPT_TOP [context]; |
---|
699 | uint32_t new_update = ((top==0)?_param->_size_upt_queue[context]:top)-1; |
---|
700 | |
---|
701 | Taddress_t address_src = reg_UPDATE_PREDICTION_TABLE [context][depth]._address_src; |
---|
702 | upt_state_t top_state = reg_UPDATE_PREDICTION_TABLE [context][top]._state; |
---|
703 | |
---|
704 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * upt_event_state : %s",toString(upt_event_state).c_str()); |
---|
705 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * top_state : %s",toString(top_state).c_str()); |
---|
706 | |
---|
707 | bool previous_ufpt_event = (reg_UFPT_EVENT_STATE [context] == UFPT_EVENT_STATE_KO_FLUSH); |
---|
708 | |
---|
709 | |
---|
710 | bool previous_upt_event = (false |
---|
711 | or (upt_event_state == UPT_EVENT_STATE_KO_MISS_WAIT_UFPT ) |
---|
712 | or (upt_event_state == UPT_EVENT_STATE_KO_MISS_FLUSH_UPT ) |
---|
713 | or (upt_event_state == UPT_EVENT_STATE_KO_EVENT_WAIT_UFPT) |
---|
714 | or (upt_event_state == UPT_EVENT_STATE_KO_EVENT_FLUSH_UPT) |
---|
715 | or (upt_event_state == UPT_EVENT_STATE_KO_COMMIT_WAIT_END_UPDATE) |
---|
716 | or (top_state == UPDATE_PREDICTION_STATE_END_KO ) |
---|
717 | or (top_state == UPDATE_PREDICTION_STATE_KO ) |
---|
718 | ); |
---|
719 | |
---|
720 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * top : %d",top); |
---|
721 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * new_update : %d",new_update); |
---|
722 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * previous_upt_event : %d",previous_upt_event); |
---|
723 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * previous_ufpt_event : %d",previous_ufpt_event); |
---|
724 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_UPDATE : %d",reg_UPT_UPDATE [context]); |
---|
725 | |
---|
726 | // Have a miss !!! |
---|
727 | // Flush UPFT |
---|
728 | flush_UFPT [context] |= not previous_ufpt_event; |
---|
729 | |
---|
730 | // Test if the entry wait the branchment (else, they have a previous event) |
---|
731 | if (reg_UPDATE_PREDICTION_TABLE [context][depth]._state == UPDATE_PREDICTION_STATE_WAIT_END) |
---|
732 | { |
---|
733 | // All instruction between the instruction and the top is disable |
---|
734 | for (uint32_t j=(depth+1)%_param->_size_upt_queue[context]; |
---|
735 | j!=top; |
---|
736 | j=(j+1)%_param->_size_upt_queue[context]) |
---|
737 | { |
---|
738 | reg_UPDATE_PREDICTION_TABLE [context][j]._state = UPDATE_PREDICTION_STATE_EVENT; |
---|
739 | reg_UPDATE_PREDICTION_TABLE [context][j]._retire_ok = false; // event |
---|
740 | } |
---|
741 | |
---|
742 | // New top |
---|
743 | reg_UPT_TOP [context] = depth; |
---|
744 | |
---|
745 | if (not previous_upt_event) |
---|
746 | { |
---|
747 | reg_UPT_TOP_EVENT [context] = top; |
---|
748 | reg_UPT_UPDATE [context] = new_update; |
---|
749 | } |
---|
750 | else |
---|
751 | { |
---|
752 | // Have event. Top index this slot |
---|
753 | reg_UPDATE_PREDICTION_TABLE [context][top]._retire_ok = false; |
---|
754 | |
---|
755 | switch (top_state) |
---|
756 | { |
---|
757 | case UPDATE_PREDICTION_STATE_END_KO : |
---|
758 | case UPDATE_PREDICTION_STATE_END : |
---|
759 | { |
---|
760 | // Have already update predictor |
---|
761 | reg_UPDATE_PREDICTION_TABLE [context][top]._state = UPDATE_PREDICTION_STATE_END; |
---|
762 | reg_UPT_UPDATE [context] = new_update; |
---|
763 | break; |
---|
764 | } |
---|
765 | case UPDATE_PREDICTION_STATE_KO : |
---|
766 | { |
---|
767 | // Doesn't have update predictor |
---|
768 | reg_UPDATE_PREDICTION_TABLE [context][top]._state = UPDATE_PREDICTION_STATE_EVENT; |
---|
769 | break; |
---|
770 | } |
---|
771 | default : |
---|
772 | { |
---|
773 | // reg_UPDATE_PREDICTION_TABLE [context][top]._state = UPDATE_PREDICTION_STATE_EVENT; |
---|
774 | // break; |
---|
775 | |
---|
776 | #ifdef DEBUG_TEST |
---|
777 | throw ERRORMORPHEO(FUNCTION,_("Branch complete : invalid upt state.")); |
---|
778 | #endif |
---|
779 | } |
---|
780 | } |
---|
781 | } |
---|
782 | |
---|
783 | if (reg_UPT_BOTTOM [context] == reg_UPT_TOP [context]) |
---|
784 | reg_UPT_EMPTY [context] = true; |
---|
785 | |
---|
786 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_KO (branch_complete, ifetch hit)",context,depth); |
---|
787 | reg_UPDATE_PREDICTION_TABLE [context][depth]._state = UPDATE_PREDICTION_STATE_KO; |
---|
788 | |
---|
789 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE [%d] : %d",context,reg_UFPT_NB_NEED_UPDATE [context]); |
---|
790 | |
---|
791 | // if ( (reg_UFPT_NB_NEED_UPDATE [context] > 0) or |
---|
792 | // (reg_UFPT_NB_UPDATE [context] > 0)) |
---|
793 | // { |
---|
794 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT [%d] <- EVENT_STATE_MISS_FLUSH_UFPT_AND_UPT (branch_complete - miss)",context); |
---|
795 | // reg_EVENT_STATE [context] = EVENT_STATE_MISS_FLUSH_UFPT_AND_UPT; |
---|
796 | // } |
---|
797 | // else |
---|
798 | // { |
---|
799 | // // if (not previous_update_ras) |
---|
800 | // { |
---|
801 | // // have ras prediction ? |
---|
802 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT [%d] <- EVENT_STATE_MISS_FLUSH_UPT (branch_complete - miss)",context); |
---|
803 | |
---|
804 | // reg_EVENT_STATE [context] = EVENT_STATE_MISS_FLUSH_UPT; |
---|
805 | |
---|
806 | // } |
---|
807 | // } |
---|
808 | |
---|
809 | reg_UPT_EVENT_STATE [context] = UPT_EVENT_STATE_KO_MISS_FLUSH_UPT; |
---|
810 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT_EVENT_STATE [%d] <- %s (branch_complete, ifetch hit)",context,toString(reg_UPT_EVENT_STATE [context]).c_str()); |
---|
811 | |
---|
812 | // reg_EVENT_SOURCE [context] = EVENT_SOURCE_UPT; |
---|
813 | |
---|
814 | // else no update |
---|
815 | |
---|
816 | // reg_EVENT_IS_BRANCH [context] = true; |
---|
817 | reg_EVENT_DEPTH [context] = depth; |
---|
818 | reg_EVENT_ADDRESS_SRC [context] = address_src; // delay_slot is compute in Context_State |
---|
819 | reg_EVENT_ADDRESS_DEST_VAL[context] = good_take; |
---|
820 | reg_EVENT_ADDRESS_DEST [context] = good_addr; |
---|
821 | reg_EVENT_CAN_CONTINUE [context] = false; |
---|
822 | |
---|
823 | } |
---|
824 | |
---|
825 | reg_UPDATE_PREDICTION_TABLE [context][depth]._miss_commit = true; |
---|
826 | } |
---|
827 | } |
---|
828 | else |
---|
829 | { |
---|
830 | // Hit case |
---|
831 | |
---|
832 | // #ifdef DEBUG_TEST |
---|
833 | // if (reg_UPDATE_PREDICTION_TABLE [context][depth]._state != UPDATE_PREDICTION_STATE_WAIT_END) |
---|
834 | // throw ERRORMORPHEO(FUNCTION,_("Branch complete : invalid upt state.")); |
---|
835 | // #endif |
---|
836 | |
---|
837 | // In same cycle, can have a previous branch_complete |
---|
838 | if (reg_UPDATE_PREDICTION_TABLE [context][depth]._state == UPDATE_PREDICTION_STATE_WAIT_END) |
---|
839 | { |
---|
840 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_OK (branch_complete, ifetch hit)",context,depth); |
---|
841 | reg_UPDATE_PREDICTION_TABLE [context][depth]._state = UPDATE_PREDICTION_STATE_OK; |
---|
842 | } |
---|
843 | } |
---|
844 | |
---|
845 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s",toString(reg_UPT_EVENT_STATE [context]).c_str()); |
---|
846 | |
---|
847 | // In all case : update good_take |
---|
848 | reg_UPDATE_PREDICTION_TABLE [context][depth]._good_take = good_take; |
---|
849 | |
---|
850 | // Write address_dest if need read register |
---|
851 | Tbranch_condition_t condition = reg_UPDATE_PREDICTION_TABLE [context][depth]._condition; |
---|
852 | |
---|
853 | if ((condition == BRANCH_CONDITION_READ_REGISTER_WITHOUT_WRITE_STACK) or |
---|
854 | (condition == BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK ) or |
---|
855 | (condition == BRANCH_CONDITION_READ_STACK ) ) |
---|
856 | reg_UPDATE_PREDICTION_TABLE [context][depth]._address_dest = good_addr; |
---|
857 | } |
---|
858 | } |
---|
859 | |
---|
860 | // =================================================================== |
---|
861 | // =====[ BRANCH_EVENT ]============================================== |
---|
862 | // =================================================================== |
---|
863 | for (uint32_t i=0; i<_param->_nb_context; i++) |
---|
864 | if (internal_BRANCH_EVENT_VAL [i] and PORT_READ(in_BRANCH_EVENT_ACK [i])) |
---|
865 | { |
---|
866 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_EVENT [%d] - Accepted",i); |
---|
867 | |
---|
868 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [i]; |
---|
869 | |
---|
870 | switch (upt_event_state) |
---|
871 | { |
---|
872 | case UPT_EVENT_STATE_KO_DECODE_UPDATE_CONTEXT : upt_event_state = UPT_EVENT_STATE_KO_DECODE_WAIT_END_EVENT; break; |
---|
873 | case UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT : upt_event_state = UPT_EVENT_STATE_KO_COMMIT_WAIT_END_EVENT; break; |
---|
874 | default : break; // an other branch is occured |
---|
875 | } |
---|
876 | |
---|
877 | reg_UPT_EVENT_STATE [i] = upt_event_state; |
---|
878 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s (branch_event)",toString(upt_event_state).c_str()); |
---|
879 | } |
---|
880 | |
---|
881 | // =================================================================== |
---|
882 | // =====[ EVENT ]===================================================== |
---|
883 | // =================================================================== |
---|
884 | for (uint32_t i=0; i<_param->_nb_context; ++i) |
---|
885 | if (PORT_READ(in_EVENT_VAL [i]) and internal_EVENT_ACK [i]) |
---|
886 | { |
---|
887 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT"); |
---|
888 | |
---|
889 | //---------------------------------------------------------------- |
---|
890 | // Cases |
---|
891 | //---------------------------------------------------------------- |
---|
892 | // * EVENT_TYPE_NONE - nothing |
---|
893 | // * EVENT_TYPE_MISS_SPECULATION - Change state, reset pointer |
---|
894 | // * EVENT_TYPE_EXCEPTION - Flush upft and upt, Change state, reset pointer |
---|
895 | // * EVENT_TYPE_BRANCH_NO_ACCURATE - nothing : manage in decod and update |
---|
896 | // * EVENT_TYPE_SPR_ACCESS - nothing |
---|
897 | // * EVENT_TYPE_MSYNC - nothing |
---|
898 | // * EVENT_TYPE_PSYNC - nothing |
---|
899 | // * EVENT_TYPE_CSYNC - nothing |
---|
900 | |
---|
901 | Tevent_type_t event_type = PORT_READ(in_EVENT_TYPE [i]); |
---|
902 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [i]; |
---|
903 | |
---|
904 | // Test if end of miss -> all previous branch is complete |
---|
905 | // -> all next branch is finish |
---|
906 | |
---|
907 | switch (event_type) |
---|
908 | { |
---|
909 | case EVENT_TYPE_BRANCH_MISS_SPECULATION : |
---|
910 | { |
---|
911 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * type : EVENT_TYPE_BRANCH_MISS_SPECULATION"); |
---|
912 | |
---|
913 | switch (upt_event_state) |
---|
914 | { |
---|
915 | case UPT_EVENT_STATE_KO_COMMIT_WAIT_END_EVENT : |
---|
916 | { |
---|
917 | Tdepth_t depth = reg_EVENT_UPT_PTR [i]; |
---|
918 | Tdepth_t update = reg_UPT_UPDATE [i]; |
---|
919 | |
---|
920 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * depth : %d",depth); |
---|
921 | |
---|
922 | if (reg_UPDATE_PREDICTION_TABLE [i][depth]._state == UPDATE_PREDICTION_STATE_END_KO) |
---|
923 | { |
---|
924 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d][%d].state <- UPDATE_PREDICTION_STATE_END (event)",i,depth); |
---|
925 | |
---|
926 | reg_UPDATE_PREDICTION_TABLE [i][depth]._state = UPDATE_PREDICTION_STATE_END; |
---|
927 | } |
---|
928 | |
---|
929 | // Special case : branch_complete a speculative branch and the context_state signal the end of this event before the complete of previous branch |
---|
930 | if (depth != update) |
---|
931 | { |
---|
932 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT [%d] <- EVENT_STATE_COMMIT_WAIT_END_UPDATE (event)",i); |
---|
933 | upt_event_state = UPT_EVENT_STATE_KO_COMMIT_WAIT_END_UPDATE; |
---|
934 | |
---|
935 | break; // stop here |
---|
936 | } |
---|
937 | |
---|
938 | reg_UPT_TOP [i] = reg_UPT_TOP_EVENT [i]; |
---|
939 | reg_UPT_UPDATE [i] = reg_UPT_TOP_EVENT [i]; |
---|
940 | |
---|
941 | // break; continue |
---|
942 | } |
---|
943 | case UPT_EVENT_STATE_KO_DECODE_WAIT_END_EVENT : |
---|
944 | { |
---|
945 | // Change state |
---|
946 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * EVENT [%d] <- EVENT_STATE_OK (event)",i); |
---|
947 | |
---|
948 | upt_event_state = UPT_EVENT_STATE_OK; |
---|
949 | reg_IS_ACCURATE [i] = true; |
---|
950 | |
---|
951 | break; |
---|
952 | } |
---|
953 | default : break; // an other branch is occured |
---|
954 | } |
---|
955 | |
---|
956 | break; |
---|
957 | } |
---|
958 | case EVENT_TYPE_LOAD_MISS_SPECULATION : |
---|
959 | case EVENT_TYPE_EXCEPTION : |
---|
960 | { |
---|
961 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * type : EVENT_TYPE_LOAD_MISS_SPECULATION"); |
---|
962 | |
---|
963 | // Have a miss !!! |
---|
964 | // Flush UPFT |
---|
965 | flush_UFPT [i] = true; |
---|
966 | |
---|
967 | if (upt_event_state == UPT_EVENT_STATE_KO_COMMIT_WAIT_END_UPDATE) |
---|
968 | { |
---|
969 | reg_UPT_TOP [i] = reg_UPT_TOP_EVENT [i]; |
---|
970 | reg_UPT_UPDATE [i] = reg_UPT_TOP_EVENT [i]; |
---|
971 | reg_IS_ACCURATE [i] = true; |
---|
972 | |
---|
973 | upt_event_state = UPT_EVENT_STATE_OK; |
---|
974 | } |
---|
975 | |
---|
976 | // Flush UPT |
---|
977 | uint32_t bottom = reg_UPT_BOTTOM [i]; |
---|
978 | |
---|
979 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * bottom : %d",bottom); |
---|
980 | |
---|
981 | // event_state_t event_state = reg_EVENT_STATE [i]; |
---|
982 | // bool previous_update_ras = ((event_state == EVENT_STATE_MISS_FLUSH_UFPT_AND_UPT ) or |
---|
983 | // (event_state == EVENT_STATE_MISS_FLUSH_UPT ) or |
---|
984 | // (event_state == EVENT_STATE_EVENT_FLUSH_UFPT_AND_UPT) or |
---|
985 | // (event_state == EVENT_STATE_EVENT_FLUSH_UPT)); |
---|
986 | |
---|
987 | bool find = false; // have slot to update ??? |
---|
988 | bool find_top = false; |
---|
989 | Tdepth_t top = bottom; |
---|
990 | Tdepth_t update = bottom; |
---|
991 | bool empty = reg_UPT_EMPTY [i]; |
---|
992 | |
---|
993 | // flush all slot, because this event is in head of rob |
---|
994 | for (uint32_t j=0; j<_param->_size_upt_queue[i]; ++j) |
---|
995 | { |
---|
996 | Tdepth_t x = (bottom+j)%_param->_size_upt_queue[i]; |
---|
997 | |
---|
998 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT [%d] : %s",x,toString(reg_UPDATE_PREDICTION_TABLE [i][x]._state).c_str()); |
---|
999 | |
---|
1000 | if ((reg_UPDATE_PREDICTION_TABLE [i][x]._state != UPDATE_PREDICTION_STATE_END) and |
---|
1001 | (reg_UPDATE_PREDICTION_TABLE [i][x]._state != UPDATE_PREDICTION_STATE_EMPTY)) |
---|
1002 | { |
---|
1003 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * find at UPT[%d]",x); |
---|
1004 | |
---|
1005 | find = true; // find a not empty slot |
---|
1006 | reg_UPDATE_PREDICTION_TABLE [i][x]._state = UPDATE_PREDICTION_STATE_EVENT; |
---|
1007 | reg_UPDATE_PREDICTION_TABLE [i][x]._retire_ok = false; |
---|
1008 | update = x; |
---|
1009 | } |
---|
1010 | |
---|
1011 | if (reg_UPDATE_PREDICTION_TABLE [i][x]._state != UPDATE_PREDICTION_STATE_EMPTY) |
---|
1012 | if (not find_top) |
---|
1013 | { |
---|
1014 | top = x; |
---|
1015 | find_top = true; |
---|
1016 | } |
---|
1017 | } |
---|
1018 | |
---|
1019 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * find : %d",find); |
---|
1020 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * top : %d",top); |
---|
1021 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * update : %d",update); |
---|
1022 | |
---|
1023 | // Test if have update slot |
---|
1024 | reg_UPT_TOP_EVENT [i] = reg_UPT_TOP[i]; |
---|
1025 | if (find) |
---|
1026 | { |
---|
1027 | // TODO : special case : event is an exception on branch, also depth is not valid |
---|
1028 | reg_UPT_TOP [i] = top; // depth is again valid |
---|
1029 | |
---|
1030 | if (bottom == reg_UPT_TOP [i]) |
---|
1031 | reg_UPT_EMPTY [i] = true; |
---|
1032 | |
---|
1033 | reg_UPT_UPDATE [i] = update; |
---|
1034 | } |
---|
1035 | |
---|
1036 | // new state : |
---|
1037 | // * test if ufpt is empty |
---|
1038 | // * ok : flush upft and upt |
---|
1039 | // * ko : test if have previous flush upt |
---|
1040 | // * ok : nothing |
---|
1041 | // * ko : flush upt |
---|
1042 | // reg_EVENT_VAL [i] = find; |
---|
1043 | // reg_EVENT_IS_BRANCH [i] = false; |
---|
1044 | // reg_EVENT_UPT_PTR [i] = ((top==0)?_param->_size_upt_queue[i]:top)-1; ///// ZE MODIF |
---|
1045 | reg_EVENT_UPT_PTR [i] = top; |
---|
1046 | reg_EVENT_UPT_FULL [i] = (not empty and (bottom == reg_UPT_TOP [i])); |
---|
1047 | // reg_EVENT_DEPTH [i] = PORT_READ(in_EVENT_DEPTH [i]);//(top+1)%_param->_size_upt_queue[i]; |
---|
1048 | reg_EVENT_DEPTH [i] = top; |
---|
1049 | |
---|
1050 | // reg_EVENT_ADDRESS_SRC [i] = address_src; // delay_slot is compute in I_State |
---|
1051 | // reg_EVENT_ADDRESS_DEST_VAL[i] = good_take; |
---|
1052 | // reg_EVENT_ADDRESS_DEST [i] = good_addr; |
---|
1053 | |
---|
1054 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_BOTTOM : %d",reg_UPT_BOTTOM [i]); |
---|
1055 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_TOP : %d",reg_UPT_TOP [i]); |
---|
1056 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EMPTY : %d",reg_UPT_EMPTY [i]); |
---|
1057 | |
---|
1058 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_VAL : %d",reg_EVENT_VAL [i]); |
---|
1059 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UPT_PTR : %d",reg_EVENT_UPT_PTR [i]); |
---|
1060 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UPT_FULL : %d",reg_EVENT_UPT_FULL [i]); |
---|
1061 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE : %d",reg_UFPT_NB_NEED_UPDATE [i]); |
---|
1062 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_UPDATE : %d",reg_UFPT_NB_UPDATE [i]); |
---|
1063 | |
---|
1064 | if (find) |
---|
1065 | { |
---|
1066 | // have ras prediction ? |
---|
1067 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT_EVENT [%d] <- UPT_EVENT_STATE_KO_EVENT_FLUSH_UPT (event - find)",i); |
---|
1068 | |
---|
1069 | upt_event_state = UPT_EVENT_STATE_KO_EVENT_FLUSH_UPT; |
---|
1070 | } |
---|
1071 | else |
---|
1072 | { |
---|
1073 | // special case : nothing |
---|
1074 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * UPT_EVENT [%d] <- UPT_EVENT_STATE_KO_EVENT_WAIT_UFPT (event - not find)",i); |
---|
1075 | |
---|
1076 | // reg_EVENT_VAL [i] = false; |
---|
1077 | |
---|
1078 | upt_event_state = UPT_EVENT_STATE_KO_EVENT_WAIT_UFPT; |
---|
1079 | } |
---|
1080 | |
---|
1081 | break; |
---|
1082 | } |
---|
1083 | default : |
---|
1084 | { |
---|
1085 | // nothing |
---|
1086 | break; |
---|
1087 | } |
---|
1088 | } |
---|
1089 | |
---|
1090 | reg_UPT_EVENT_STATE [i] = upt_event_state; |
---|
1091 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EVENT_STATE : %s (branch_event)",toString(upt_event_state).c_str()); |
---|
1092 | } |
---|
1093 | |
---|
1094 | // =================================================================== |
---|
1095 | // =====[ FLUSH ]===================================================== |
---|
1096 | // =================================================================== |
---|
1097 | |
---|
1098 | for (uint32_t i=0; i<_param->_nb_context; ++i) |
---|
1099 | { |
---|
1100 | if (flush_UFPT [i]) |
---|
1101 | { |
---|
1102 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Flush Update Fetch Prediction Table"); |
---|
1103 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",i); |
---|
1104 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE : %d",reg_UFPT_NB_NEED_UPDATE [i]); |
---|
1105 | |
---|
1106 | // It's to accelerate miss speculation -> associative access |
---|
1107 | if (reg_UFPT_NB_NEED_UPDATE [i] == 0) |
---|
1108 | { |
---|
1109 | // No entry need prediction, flush all entry -> Reset |
---|
1110 | for (uint32_t j=0; j<_param->_size_ufpt_queue[i]; ++j) |
---|
1111 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._state = UPDATE_FETCH_PREDICTION_STATE_EMPTY; |
---|
1112 | reg_UFPT_BOTTOM [i] = 0; |
---|
1113 | reg_UFPT_TOP [i] = 0; |
---|
1114 | } |
---|
1115 | else |
---|
1116 | { |
---|
1117 | uint32_t bottom = reg_UFPT_BOTTOM [i]; |
---|
1118 | for (uint32_t j=0; j<_param->_size_ufpt_queue[i]; ++j) |
---|
1119 | { |
---|
1120 | uint32_t index = (bottom+j)%_param->_size_ufpt_queue[i]; |
---|
1121 | // EMPTY : no event |
---|
1122 | // END : already update |
---|
1123 | // EVENT : previous event |
---|
1124 | if (reg_UPDATE_FETCH_PREDICTION_TABLE [i][index]._state == UPDATE_FETCH_PREDICTION_STATE_WAIT_DECOD) |
---|
1125 | { |
---|
1126 | reg_UFPT_UPDATE [i] = index; |
---|
1127 | reg_UFPT_NB_UPDATE [i] ++; |
---|
1128 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][index]._state = UPDATE_FETCH_PREDICTION_STATE_EVENT; |
---|
1129 | } |
---|
1130 | } |
---|
1131 | |
---|
1132 | // Change state |
---|
1133 | reg_UFPT_EVENT_STATE [i] = UFPT_EVENT_STATE_KO_FLUSH; |
---|
1134 | } |
---|
1135 | |
---|
1136 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_UPDATE (after ) : %d",reg_UFPT_UPDATE [i]); |
---|
1137 | |
---|
1138 | } |
---|
1139 | |
---|
1140 | // Change state on UPT |
---|
1141 | { |
---|
1142 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [i]; |
---|
1143 | ufpt_event_state_t ufpt_event_state = reg_UFPT_EVENT_STATE [i]; |
---|
1144 | |
---|
1145 | // Test upt event to change state |
---|
1146 | // test if upt wait ufpt |
---|
1147 | if (ufpt_event_state == UFPT_EVENT_STATE_OK) |
---|
1148 | switch (upt_event_state) |
---|
1149 | { |
---|
1150 | // this case when don't need flush upt (miss decod and can continue) |
---|
1151 | case UPT_EVENT_STATE_KO_MISS_WAIT_UFPT : upt_event_state = UPT_EVENT_STATE_KO_COMMIT_UPDATE_CONTEXT; break; |
---|
1152 | case UPT_EVENT_STATE_KO_EVENT_WAIT_UFPT : upt_event_state = UPT_EVENT_STATE_OK ; break; |
---|
1153 | default : break; |
---|
1154 | } |
---|
1155 | |
---|
1156 | reg_UPT_EVENT_STATE [i] = upt_event_state; |
---|
1157 | } |
---|
1158 | } |
---|
1159 | |
---|
1160 | #ifdef STATISTICS |
---|
1161 | if (usage_is_set(_usage,USE_STATISTICS)) |
---|
1162 | for (uint32_t i=0; i<_param->_nb_context; i++) |
---|
1163 | { |
---|
1164 | for (uint32_t j=0; j<_param->_size_ufpt_queue[i]; j++) |
---|
1165 | if (reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._state != UPDATE_FETCH_PREDICTION_STATE_EMPTY) |
---|
1166 | (*_stat_ufpt_queue_nb_elt [i]) ++; |
---|
1167 | for (uint32_t j=0; j<_param->_size_upt_queue[i]; j++) |
---|
1168 | if (reg_UPDATE_PREDICTION_TABLE [i][j]._state != UPDATE_PREDICTION_STATE_EMPTY) |
---|
1169 | (*_stat_upt_queue_nb_elt [i]) ++; |
---|
1170 | } |
---|
1171 | #endif |
---|
1172 | |
---|
1173 | // =================================================================== |
---|
1174 | // =====[ PRINT ]===================================================== |
---|
1175 | // =================================================================== |
---|
1176 | |
---|
1177 | #if (DEBUG >= DEBUG_TRACE) |
---|
1178 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Dump Update_Prediction_Table"); |
---|
1179 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPDATE_PRIORITY : %d",reg_UPDATE_PRIORITY); |
---|
1180 | for (uint32_t i=0; i<_param->_nb_context; i++) |
---|
1181 | { |
---|
1182 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_IS_ACCURATE : %d",reg_IS_ACCURATE [i]); |
---|
1183 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UFPT_STATE : %s" ,toString(reg_UFPT_EVENT_STATE [i]).c_str()); |
---|
1184 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UPT_STATE : %s" ,toString(reg_UPT_EVENT_STATE [i]).c_str()); |
---|
1185 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_VAL : %d" ,reg_EVENT_VAL [i]); |
---|
1186 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UPT_PTR : %d" ,reg_EVENT_UPT_PTR [i]); |
---|
1187 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_UPT_FULL : %d" ,reg_EVENT_UPT_FULL [i]); |
---|
1188 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_IS_BRANCH : %d" ,reg_EVENT_IS_BRANCH [i]); |
---|
1189 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_DEPTH : %d" ,reg_EVENT_DEPTH [i]); |
---|
1190 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_ADDRESS_SRC : %.8x (%.8x)",reg_EVENT_ADDRESS_SRC [i],reg_EVENT_ADDRESS_SRC [i]<<2); |
---|
1191 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_ADDRESS_DEST_VAL: %d" ,reg_EVENT_ADDRESS_DEST_VAL[i]); |
---|
1192 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_ADDRESS_DEST : %.8x (%.8x)",reg_EVENT_ADDRESS_DEST [i],reg_EVENT_ADDRESS_DEST [i]<<2); |
---|
1193 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_EVENT_CAN_CONTINUE : %d" ,reg_EVENT_CAN_CONTINUE [i]); |
---|
1194 | |
---|
1195 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Dump UFPT [%d] (Update_Fetch_Prediction_Table)",i); |
---|
1196 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_BOTTOM : %d",reg_UFPT_BOTTOM [i]); |
---|
1197 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_TOP : %d",reg_UFPT_TOP [i]); |
---|
1198 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_UPDATE : %d",reg_UFPT_UPDATE [i]); |
---|
1199 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_NEED_UPDATE : %d",reg_UFPT_NB_NEED_UPDATE [i]); |
---|
1200 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UFPT_NB_UPDATE : %d",reg_UFPT_NB_UPDATE [i]); |
---|
1201 | for (uint32_t j=0; j<_param->_size_ufpt_queue[i]; j++) |
---|
1202 | { |
---|
1203 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," [%d] %.4d, %.8x (%.8x) %.8x (%.8x), %.1d %.1d, %.8lld %.8x (%.8x) %.4d - %s", |
---|
1204 | j, |
---|
1205 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._condition, |
---|
1206 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_src, |
---|
1207 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_src<<2, |
---|
1208 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_dest, |
---|
1209 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_dest<<2, |
---|
1210 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._last_take, |
---|
1211 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._is_accurate, |
---|
1212 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._history, |
---|
1213 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_ras, |
---|
1214 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._address_ras<<2, |
---|
1215 | reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._index_ras, |
---|
1216 | toString(reg_UPDATE_FETCH_PREDICTION_TABLE [i][j]._state).c_str() |
---|
1217 | ); |
---|
1218 | } |
---|
1219 | |
---|
1220 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * Dump UPT [%d] (Update_Prediction_Table)",i); |
---|
1221 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_BOTTOM : %d",reg_UPT_BOTTOM [i]); |
---|
1222 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_TOP : %d",reg_UPT_TOP [i]); |
---|
1223 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_TOP_EVENT : %d",reg_UPT_TOP_EVENT [i]); |
---|
1224 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_UPDATE : %d",reg_UPT_UPDATE [i]); |
---|
1225 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * reg_UPT_EMPTY : %d",reg_UPT_EMPTY [i]); |
---|
1226 | for (uint32_t j=0; j<_param->_size_upt_queue[i]; j++) |
---|
1227 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," [%d] %.4d, %.8x (%.8x) %.8x (%.8x), %.1d %.1d %.1d, %.8lld %.8x (%.8x) %.4d - %s", |
---|
1228 | j, |
---|
1229 | reg_UPDATE_PREDICTION_TABLE [i][j]._condition, |
---|
1230 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_src, |
---|
1231 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_src<<2, |
---|
1232 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_dest, |
---|
1233 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_dest<<2, |
---|
1234 | reg_UPDATE_PREDICTION_TABLE [i][j]._last_take, |
---|
1235 | reg_UPDATE_PREDICTION_TABLE [i][j]._good_take, |
---|
1236 | reg_UPDATE_PREDICTION_TABLE [i][j]._is_accurate, |
---|
1237 | reg_UPDATE_PREDICTION_TABLE [i][j]._history, |
---|
1238 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_ras, |
---|
1239 | reg_UPDATE_PREDICTION_TABLE [i][j]._address_ras<<2, |
---|
1240 | reg_UPDATE_PREDICTION_TABLE [i][j]._index_ras, |
---|
1241 | toString(reg_UPDATE_PREDICTION_TABLE [i][j]._state).c_str() |
---|
1242 | ); |
---|
1243 | } |
---|
1244 | #endif |
---|
1245 | |
---|
1246 | #ifdef DEBUG_TEST |
---|
1247 | for (uint32_t i=0; i<_param->_nb_context; i++) |
---|
1248 | { |
---|
1249 | if (reg_UFPT_NB_NEED_UPDATE [i] > _param->_size_ufpt_queue[i]) |
---|
1250 | throw ERRORMORPHEO(FUNCTION,toString(_("reg_UFPT_NB_NEED_UPDATE [%d] (%d) is > at size_ufpt_queue (%d).\n"),i,reg_UFPT_NB_NEED_UPDATE [i],_param->_size_ufpt_queue[i])); |
---|
1251 | if (reg_UFPT_NB_UPDATE [i] > _param->_size_ufpt_queue[i]) |
---|
1252 | throw ERRORMORPHEO(FUNCTION,toString(_("reg_UFPT_NB_UPDATE [%d] (%d) is > at size_ufpt_queue (%d).\n"),i,reg_UFPT_NB_UPDATE [i],_param->_size_ufpt_queue[i])); |
---|
1253 | } |
---|
1254 | #endif |
---|
1255 | |
---|
1256 | } |
---|
1257 | |
---|
1258 | |
---|
1259 | #if defined(STATISTICS) or defined(VHDL_TESTBENCH) |
---|
1260 | end_cycle (); |
---|
1261 | #endif |
---|
1262 | |
---|
1263 | log_end(Update_Prediction_Table,FUNCTION); |
---|
1264 | }; |
---|
1265 | |
---|
1266 | }; // end namespace update_prediction_table |
---|
1267 | }; // end namespace prediction_unit |
---|
1268 | }; // end namespace front_end |
---|
1269 | }; // end namespace multi_front_end |
---|
1270 | }; // end namespace core |
---|
1271 | |
---|
1272 | }; // end namespace behavioural |
---|
1273 | }; // end namespace morpheo |
---|
1274 | #endif |
---|