[81] | 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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[88] | 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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[122] | 29 | // For each prediction |
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[81] | 30 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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| 31 | { |
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[122] | 32 | // Read information |
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[81] | 33 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_PREDICT_CONTEXT_ID [i]):0; |
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[122] | 34 | uint32_t top = reg_UFPT_TOP[context]; // not multi branch prediction |
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[81] | 35 | |
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[88] | 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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[81] | 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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[122] | 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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[81] | 45 | |
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[88] | 46 | // Ack if : |
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[122] | 47 | // * no previous event (ufpt and upt is ok) |
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| 48 | // * top slot is empty |
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[88] | 49 | // * is_accurate |
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[122] | 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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[88] | 53 | is_accurate); |
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| 54 | |
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[122] | 55 | internal_PREDICT_UPDATE_PREDICTION_ID [i] = top; |
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[88] | 56 | |
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| 57 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ACK : %d",internal_PREDICT_ACK [i]); |
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[122] | 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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[81] | 61 | } |
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| 62 | |
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[88] | 63 | }//don't reset |
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[123] | 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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[88] | 72 | |
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[123] | 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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[88] | 76 | log_end(Update_Prediction_Table,FUNCTION); |
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[81] | 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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