[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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| 24 | log_printf(FUNC,Update_Prediction_Table,FUNCTION,"Begin"); |
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| 25 | |
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| 26 | for (uint32_t i=0; i<_param->_nb_inst_branch_complete; i++) |
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| 27 | { |
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| 28 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_BRANCH_COMPLETE_CONTEXT_ID [i]):0; |
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[82] | 29 | Tdepth_t depth = (_param->_have_port_max_depth )?PORT_READ(in_BRANCH_COMPLETE_DEPTH [i]):0; |
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[81] | 30 | Tcontrol_t miss = false; |
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| 31 | Tcontrol_t take = reg_UPDATE_PREDICTION_TABLE [context][depth]._last_take ; |
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| 32 | Taddress_t addr_dest = reg_UPDATE_PREDICTION_TABLE [context][depth]._address_dest; |
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| 33 | Tbranch_condition_t condition = reg_UPDATE_PREDICTION_TABLE [context][depth]._condition ; |
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| 34 | |
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| 35 | switch (condition) |
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| 36 | { |
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| 37 | case BRANCH_CONDITION_NONE_WITHOUT_WRITE_STACK : // l.j |
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| 38 | case BRANCH_CONDITION_NONE_WITH_WRITE_STACK : // l.jal |
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| 39 | { |
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| 40 | //miss : always hit |
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| 41 | //addr_dest : know in decod stage |
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| 42 | break; |
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| 43 | } |
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| 44 | case BRANCH_CONDITION_FLAG_UNSET : // l.bnf |
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| 45 | { |
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| 46 | Tcontrol_t take_good = PORT_READ(in_BRANCH_COMPLETE_FLAG [i]) == 0; |
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| 47 | miss = (take != take_good); |
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| 48 | take = take_good; |
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| 49 | //addr_dest : know in decod stage |
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| 50 | break; |
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| 51 | } |
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| 52 | case BRANCH_CONDITION_FLAG_SET : // l.bf |
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| 53 | { |
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| 54 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * BRANCH_CONDITION_FLAG_SET"); |
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| 55 | |
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| 56 | Tcontrol_t take_good = PORT_READ(in_BRANCH_COMPLETE_FLAG [i]) == 1; |
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| 57 | miss = (take != take_good); |
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| 58 | take = take_good; |
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| 59 | |
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| 60 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * flag : %d",PORT_READ(in_BRANCH_COMPLETE_FLAG [i])); |
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| 61 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * take_good : %d",take_good); |
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| 62 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss : %d",miss); |
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| 63 | |
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| 64 | //addr_dest : know in decod stage |
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| 65 | break; |
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| 66 | } |
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| 67 | case BRANCH_CONDITION_READ_REGISTER_WITHOUT_WRITE_STACK : // l.jr (rb!=r9) |
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| 68 | case BRANCH_CONDITION_READ_REGISTER_WITH_WRITE_STACK : // l.jalr |
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| 69 | case BRANCH_CONDITION_READ_STACK : // l.jr (rb==r9) |
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| 70 | { |
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| 71 | Taddress_t addr_good = PORT_READ(in_BRANCH_COMPLETE_ADDRESS [i]); |
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| 72 | miss = ((take == 1) and |
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| 73 | (addr_dest = addr_good)); |
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| 74 | take = 1; |
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| 75 | addr_dest = addr_good; |
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| 76 | break; |
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| 77 | } |
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| 78 | } |
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| 79 | |
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| 80 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * miss : %d",miss); |
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| 81 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * take : %d",take); |
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| 82 | // log_printf(TRACE,Update_Prediction_Table,FUNCTION," * address : %x",addr_dest); |
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| 83 | |
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| 84 | internal_BRANCH_COMPLETE_MISS_PREDICTION [i] = miss ; |
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| 85 | internal_BRANCH_COMPLETE_TAKE [i] = take ; |
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| 86 | internal_BRANCH_COMPLETE_ADDRESS_DEST [i] = addr_dest; |
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| 87 | |
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| 88 | PORT_WRITE(out_BRANCH_COMPLETE_MISS_PREDICTION [i], internal_BRANCH_COMPLETE_MISS_PREDICTION [i]); |
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| 89 | PORT_WRITE(out_BRANCH_COMPLETE_TAKE [i], internal_BRANCH_COMPLETE_TAKE [i]); |
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| 90 | PORT_WRITE(out_BRANCH_COMPLETE_ADDRESS_SRC [i], reg_UPDATE_PREDICTION_TABLE [context][depth]._address_src); |
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| 91 | PORT_WRITE(out_BRANCH_COMPLETE_ADDRESS_DEST [i], internal_BRANCH_COMPLETE_ADDRESS_DEST [i]); |
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| 92 | } |
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| 93 | |
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| 94 | log_printf(FUNC,Update_Prediction_Table,FUNCTION,"End"); |
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| 95 | }; |
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| 96 | |
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| 97 | }; // end namespace update_prediction_table |
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| 98 | }; // end namespace prediction_unit |
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| 99 | }; // end namespace front_end |
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| 100 | }; // end namespace multi_front_end |
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| 101 | }; // end namespace core |
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| 102 | |
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| 103 | }; // end namespace behavioural |
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| 104 | }; // end namespace morpheo |
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| 105 | #endif |
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