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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29 | Tdepth_t depth = (_param->_have_port_max_depth )?PORT_READ(in_BRANCH_COMPLETE_DEPTH [i]):0; |
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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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