[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_branch_complete" |
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| 22 | void Update_Prediction_Table::genMealy_branch_complete (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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[123] | 26 | |
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| 27 | if (PORT_READ(in_NRESET)) |
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| 28 | { |
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[81] | 29 | for (uint32_t i=0; i<_param->_nb_inst_branch_complete; i++) |
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[88] | 30 | #ifdef DEBUG_TEST |
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| 31 | // just to don't have exception in not transaction |
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| 32 | if (PORT_READ(in_BRANCH_COMPLETE_VAL [i])) |
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| 33 | #endif |
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[81] | 34 | { |
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[88] | 35 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_COMPLETE [%d]",i); |
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| 36 | |
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[122] | 37 | // Read information |
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| 38 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_BRANCH_COMPLETE_CONTEXT_ID [i]):0; |
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| 39 | Tdepth_t depth = (_param->_have_port_depth )?PORT_READ(in_BRANCH_COMPLETE_DEPTH [i]):0; |
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| 40 | Tcontrol_t miss = false; // init |
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| 41 | Tcontrol_t take = reg_UPDATE_PREDICTION_TABLE [context][depth]._last_take ; |
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| 42 | Taddress_t addr_dest = reg_UPDATE_PREDICTION_TABLE [context][depth]._address_dest; |
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| 43 | Tbranch_condition_t condition = reg_UPDATE_PREDICTION_TABLE [context][depth]._condition ; |
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[81] | 44 | |
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[98] | 45 | Tcontrol_t no_sequence = PORT_READ(in_BRANCH_COMPLETE_NO_SEQUENCE [i]); |
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[122] | 46 | Taddress_t addr_good = PORT_READ(in_BRANCH_COMPLETE_ADDRESS [i]); |
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[88] | 47 | |
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| 48 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * context : %d",context); |
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| 49 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * depth : %d",depth ); |
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| 50 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * condition : %s",toString(condition).c_str()); |
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[98] | 51 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * no_sequence : %d",no_sequence); |
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[88] | 52 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * address_good : %.8x",addr_good); |
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| 53 | |
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| 54 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * (before)"); |
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| 55 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss : %d",miss); |
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| 56 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * take : %d",take); |
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| 57 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * address_dest : %.8x",addr_dest); |
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| 58 | |
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[122] | 59 | // Test branch condition |
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[81] | 60 | switch (condition) |
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| 61 | { |
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| 62 | case BRANCH_CONDITION_NONE_WITHOUT_WRITE_STACK : // l.j |
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| 63 | case BRANCH_CONDITION_NONE_WITH_WRITE_STACK : // l.jal |
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| 64 | { |
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| 65 | //miss : always hit |
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[88] | 66 | //addr_dest : compute in decod stage |
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[94] | 67 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_NONE_WITHOUT_WRITE_STACK"); |
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| 68 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_NONE_WITH_WRITE_STACK "); |
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[88] | 69 | |
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| 70 | #ifdef DEBUG_TEST |
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| 71 | if (take != 1) |
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| 72 | throw ERRORMORPHEO(FUNCTION,toString("Branch_complete[%d] (condition %s) : bad direction.",i,toString(condition).c_str())); |
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[97] | 73 | // if (addr_dest != addr_good) |
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| 74 | // throw ERRORMORPHEO(FUNCTION,toString("Branch_complete[%d] (condition %s) : bad destination address.",i,toString(condition).c_str())); |
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[88] | 75 | #endif |
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| 76 | |
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[81] | 77 | break; |
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| 78 | } |
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| 79 | case BRANCH_CONDITION_FLAG_UNSET : // l.bnf |
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| 80 | case BRANCH_CONDITION_FLAG_SET : // l.bf |
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| 81 | { |
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[88] | 82 | //addr_dest : compute in decod stage |
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| 83 | //miss if the direction is bad |
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[98] | 84 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_FLAG"); |
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[94] | 85 | |
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[98] | 86 | Tcontrol_t take_good = no_sequence; |
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[88] | 87 | |
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[81] | 88 | miss = (take != take_good); |
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| 89 | take = take_good; |
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| 90 | |
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[88] | 91 | #ifdef DEBUG_TEST |
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[97] | 92 | // if (addr_dest != addr_good) |
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| 93 | // throw ERRORMORPHEO(FUNCTION,toString("Branch_complete[%d] (condition %s) : bad destination address.",i,toString(condition).c_str())); |
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[88] | 94 | #endif |
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| 95 | |
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[81] | 96 | break; |
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| 97 | } |
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| 98 | case BRANCH_CONDITION_READ_REGISTER_WITHOUT_WRITE_STACK : // l.jr (rb!=r9) |
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| 99 | case BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK : // l.jalr |
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| 100 | case BRANCH_CONDITION_READ_STACK : // l.jr (rb==r9) |
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| 101 | { |
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[94] | 102 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_READ_REGISTER_WITHOUT_WRITE_STACK"); |
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| 103 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK "); |
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| 104 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_READ_STACK "); |
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| 105 | |
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[88] | 106 | // miss if destination address is bad |
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| 107 | miss = (addr_dest != addr_good); |
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[81] | 108 | addr_dest = addr_good; |
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[88] | 109 | |
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| 110 | #ifdef DEBUG_TEST |
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| 111 | if (take != 1) |
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| 112 | throw ERRORMORPHEO(FUNCTION,toString("Branch_complete[%d] (condition %s) : bad direction.",i,toString(condition).c_str())); |
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| 113 | #endif |
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| 114 | |
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[81] | 115 | break; |
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| 116 | } |
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| 117 | } |
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| 118 | |
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[88] | 119 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * (after)"); |
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| 120 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss : %d",miss); |
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| 121 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * take : %d",take); |
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| 122 | log_printf(TRACE,Update_Prediction_Table,FUNCTION," * address_dest : %.8x",addr_dest); |
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| 123 | |
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[81] | 124 | internal_BRANCH_COMPLETE_MISS_PREDICTION [i] = miss ; |
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| 125 | internal_BRANCH_COMPLETE_TAKE [i] = take ; |
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| 126 | internal_BRANCH_COMPLETE_ADDRESS_DEST [i] = addr_dest; |
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[88] | 127 | |
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[81] | 128 | PORT_WRITE(out_BRANCH_COMPLETE_MISS_PREDICTION [i], internal_BRANCH_COMPLETE_MISS_PREDICTION [i]); |
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[111] | 129 | // PORT_WRITE(out_BRANCH_COMPLETE_TAKE [i], internal_BRANCH_COMPLETE_TAKE [i]); |
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| 130 | // PORT_WRITE(out_BRANCH_COMPLETE_ADDRESS_SRC [i], reg_UPDATE_PREDICTION_TABLE [context][depth]._address_src); |
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| 131 | // PORT_WRITE(out_BRANCH_COMPLETE_ADDRESS_DEST [i], internal_BRANCH_COMPLETE_ADDRESS_DEST [i]); |
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[81] | 132 | } |
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[123] | 133 | } |
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[88] | 134 | log_end(Update_Prediction_Table,FUNCTION); |
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[81] | 135 | }; |
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| 136 | |
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| 137 | }; // end namespace update_prediction_table |
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| 138 | }; // end namespace prediction_unit |
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| 139 | }; // end namespace front_end |
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| 140 | }; // end namespace multi_front_end |
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| 141 | }; // end namespace core |
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| 142 | |
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| 143 | }; // end namespace behavioural |
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| 144 | }; // end namespace morpheo |
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| 145 | #endif |
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