[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_decod" |
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| 22 | void Update_Prediction_Table::genMealy_decod (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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[81] | 26 | |
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[88] | 27 | // WARNING : One branch per context per cycle |
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[95] | 28 | if (PORT_READ(in_NRESET) != 0) |
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| 29 | { |
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[122] | 30 | // for each decod instruction |
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[81] | 31 | for (uint32_t i=0; i<_param->_nb_inst_decod; i++) |
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| 32 | { |
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[88] | 33 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * DECOD [%d]",i); |
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[81] | 34 | |
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[122] | 35 | // Read information |
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| 36 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_DECOD_CONTEXT_ID [i]):0; |
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| 37 | bool is_accurate = (_param->_always_accurate_decod or |
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| 38 | (_param->_can_accurate_decod and reg_IS_ACCURATE [context])); |
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| 39 | upt_event_state_t upt_event_state = reg_UPT_EVENT_STATE [context]; |
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| 40 | ufpt_event_state_t ufpt_event_state = reg_UFPT_EVENT_STATE [context]; |
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| 41 | uint32_t ptr_write = reg_UPT_TOP [context]; // One branch per context per cycle |
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| 42 | uint32_t ptr_write_next = (ptr_write+1)%_param->_size_upt_queue[context]; |
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| 43 | // Decod can continue until the next branch if next slot is empty, and no event |
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| 44 | Tcontrol_t can_continue = (reg_UPDATE_PREDICTION_TABLE [context][ptr_write_next]._state == UPDATE_PREDICTION_STATE_EMPTY); |
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[81] | 45 | |
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[122] | 46 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
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| 47 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * is_accurate : %d",is_accurate); |
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| 48 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ufpt_event_state : %s",toString(ufpt_event_state).c_str()); |
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| 49 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * upt_event_state : %s",toString(upt_event_state).c_str()); |
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| 50 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ptr_write : %d - %d",ptr_write,ptr_write_next); |
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| 51 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * upt_state : %s",toString(reg_UPDATE_PREDICTION_TABLE [context][ptr_write]._state).c_str()); |
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| 52 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * can_continue : %d",can_continue); |
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[88] | 53 | |
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[122] | 54 | // can decod (ack) if : |
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[88] | 55 | // * in all case (miss or hit), need empty slot |
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[122] | 56 | // * not previous event (state = ok) |
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[88] | 57 | // * is_accurate |
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| 58 | internal_DECOD_ACK [i] = ((reg_UPDATE_PREDICTION_TABLE [context][ptr_write]._state == UPDATE_PREDICTION_STATE_EMPTY) and |
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[122] | 59 | (ufpt_event_state == UFPT_EVENT_STATE_OK) and |
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| 60 | (upt_event_state == UPT_EVENT_STATE_OK ) and |
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| 61 | is_accurate); |
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[88] | 62 | internal_DECOD_UPT_PTR_WRITE [i] = ptr_write; |
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| 63 | |
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[122] | 64 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * ack : %d",internal_DECOD_ACK [i]); |
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[88] | 65 | |
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[110] | 66 | PORT_WRITE(out_DECOD_ACK [i], internal_DECOD_ACK [i]); |
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| 67 | PORT_WRITE(out_DECOD_CAN_CONTINUE [i], can_continue); |
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[81] | 68 | } |
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[95] | 69 | } |
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[123] | 70 | else |
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| 71 | { |
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| 72 | // RESET |
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| 73 | for (uint32_t i=0; i<_param->_nb_inst_decod; i++) |
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| 74 | PORT_WRITE(out_DECOD_ACK [i], 0); |
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| 75 | } |
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| 76 | |
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[88] | 77 | log_end(Update_Prediction_Table,FUNCTION); |
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[81] | 78 | }; |
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| 79 | |
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| 80 | }; // end namespace update_prediction_table |
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| 81 | }; // end namespace prediction_unit |
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| 82 | }; // end namespace front_end |
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| 83 | }; // end namespace multi_front_end |
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| 84 | }; // end namespace core |
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| 85 | |
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| 86 | }; // end namespace behavioural |
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| 87 | }; // end namespace morpheo |
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| 88 | #endif |
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