1 | #ifdef SYSTEMC |
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2 | /* |
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3 | * $Id: Return_Address_Stack_genMealy_predict.cpp 100 2009-01-08 13:06:27Z rosiere $ |
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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/Return_Address_Stack/include/Return_Address_Stack.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 return_address_stack { |
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18 | |
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19 | |
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20 | #undef FUNCTION |
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21 | #define FUNCTION "Return_Address_Stack::genMealy_predict" |
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22 | void Return_Address_Stack::genMealy_predict (void) |
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23 | { |
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24 | log_begin(Return_Address_Stack,FUNCTION); |
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25 | log_function(Return_Address_Stack,FUNCTION,_name.c_str()); |
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26 | |
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27 | #ifdef DEBUG_TEST |
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28 | // just to test if have many transaction on a same context |
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29 | bool context_valid [_param->_nb_context]; |
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30 | for (uint32_t i=0; i<_param->_nb_context; i++) |
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31 | context_valid [i] = true; |
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32 | #endif |
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33 | |
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34 | for (uint32_t i=0; i<_param->_nb_inst_predict; i++) |
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35 | { |
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36 | // Read context number |
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37 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_PREDICT_CONTEXT_ID [i]):0; |
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38 | |
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39 | #ifdef DEBUG_TEST |
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40 | if (PORT_READ(in_PREDICT_VAL [i])) |
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41 | { |
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42 | if (context_valid[context] == false) |
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43 | ERRORMORPHEO(FUNCTION,"Can't have 2 transactions with the same context_id"); |
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44 | context_valid[context] = false; |
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45 | } |
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46 | #endif |
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47 | |
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48 | // Get top |
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49 | Tptr_t top = reg_PREDICT_TOP[context]; |
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50 | Tcontrol_t push = PORT_READ(in_PREDICT_PUSH [i]); |
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51 | |
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52 | // Hit : |
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53 | // * if push : value is hit |
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54 | // * if pop : no empty |
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55 | internal_PREDICT_HIT [i] = (push or (reg_PREDICT_NB_ELT[context]>0)); |
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56 | |
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57 | PORT_WRITE(out_PREDICT_HIT [i], internal_PREDICT_HIT [i]); |
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58 | |
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59 | // if pop : address_pop = stack [top] |
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60 | // if push : stock [top+1] = address_push; also stack [top+1] is erase ! save the old value in the update table |
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61 | if (push) |
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62 | top = (top+1)%_param->_size_queue[context]; |
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63 | |
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64 | PORT_WRITE(out_PREDICT_ADDRESS_POP [i], reg_stack[context][top]._address); |
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65 | PORT_WRITE(out_PREDICT_INDEX [i], top); |
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66 | } |
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67 | |
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68 | log_end(Return_Address_Stack,FUNCTION); |
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69 | }; |
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70 | |
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71 | }; // end namespace return_address_stack |
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72 | }; // end namespace prediction_unit |
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73 | }; // end namespace front_end |
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74 | }; // end namespace multi_front_end |
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75 | }; // end namespace core |
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76 | }; // end namespace behavioural |
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77 | }; // end namespace morpheo |
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78 | #endif |
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