1 | #ifdef SYSTEMC |
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2 | /* |
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3 | * $Id$ |
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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 | |
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20 | #undef FUNCTION |
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21 | #define FUNCTION "Update_Prediction_Table::genMealy_predict" |
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22 | void Update_Prediction_Table::genMealy_predict (void) |
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23 | { |
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24 | log_begin(Update_Prediction_Table,FUNCTION); |
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25 | log_function(Update_Prediction_Table,FUNCTION,_name.c_str()); |
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26 | |
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27 | if (PORT_READ(in_NRESET) != 0) |
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28 | { |
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29 | // For each prediction |
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30 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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31 | { |
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32 | // Read information |
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33 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_PREDICT_CONTEXT_ID [i]):0; |
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34 | uint32_t top = reg_UFPT_TOP[context]; // not multi branch prediction |
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35 | |
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36 | log_printf(TRACE,Update_Prediction_Table,FUNCTION,"PREDICT [%d] (genMealy)",i); |
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37 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
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38 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * top : %d",top); |
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39 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * state : %s",toString(reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state).c_str()); |
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40 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * is accurate : %d",PORT_READ(in_PREDICT_BTB_IS_ACCURATE [i])); |
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41 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * need update : %d",reg_NB_ELT_NEED_UPDATE [context]); |
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42 | |
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43 | bool is_accurate = (_param->_always_accurate_predict or |
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44 | (_param->_can_accurate_predict and reg_IS_ACCURATE [context])); |
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45 | |
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46 | // Ack if : |
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47 | // * no previous event (ufpt and upt is ok) |
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48 | // * top slot is empty |
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49 | // * is_accurate |
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50 | internal_PREDICT_ACK [i] = ((reg_UFPT_EVENT_STATE [context] == UFPT_EVENT_STATE_OK) and |
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51 | (reg_UPT_EVENT_STATE [context] == UPT_EVENT_STATE_OK ) and |
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52 | (reg_UPDATE_FETCH_PREDICTION_TABLE [context][top]._state == UPDATE_FETCH_PREDICTION_STATE_EMPTY) and |
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53 | is_accurate); |
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54 | |
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55 | internal_PREDICT_UPDATE_PREDICTION_ID [i] = top; |
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56 | |
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57 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ACK : %d",internal_PREDICT_ACK [i]); |
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58 | |
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59 | if (_param->_have_port_depth) |
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60 | PORT_WRITE(out_PREDICT_UPDATE_PREDICTION_ID [i], internal_PREDICT_UPDATE_PREDICTION_ID [i]); |
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61 | } |
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62 | |
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63 | }//don't reset |
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64 | else |
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65 | { |
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66 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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67 | { |
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68 | internal_PREDICT_ACK [i] = 0; |
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69 | // internal_PREDICT_UPDATE_PREDICTION_ID [i] = top; |
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70 | } |
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71 | } |
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72 | |
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73 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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74 | PORT_WRITE(out_PREDICT_ACK [i], internal_PREDICT_ACK [i]); |
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75 | |
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76 | log_end(Update_Prediction_Table,FUNCTION); |
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77 | }; |
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78 | |
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79 | }; // end namespace update_prediction_table |
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80 | }; // end namespace prediction_unit |
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81 | }; // end namespace front_end |
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82 | }; // end namespace multi_front_end |
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83 | }; // end namespace core |
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84 | |
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85 | }; // end namespace behavioural |
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86 | }; // end namespace morpheo |
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87 | #endif |
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