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/Stage_1_Ifetch/Predictor/Meta_Predictor/Meta_Predictor_Glue/include/Meta_Predictor_Glue.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 stage_1_ifetch { |
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14 | namespace predictor { |
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15 | namespace meta_predictor { |
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16 | namespace meta_predictor_glue { |
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17 | |
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18 | |
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19 | void Meta_Predictor_Glue::genMealy_predict_history (void) |
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20 | { |
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21 | log_printf(FUNC,Meta_Predictor_Glue,"genMealy_predict_history","Begin"); |
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22 | |
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23 | for (uint32_t i=0; i<_param._nb_prediction; i++) |
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24 | { |
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25 | Thistory_t history = 0; |
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26 | Tpht_history_t predictor_0_pht_history =0, predictor_1_pht_history =0, predictor_2_pht_history =0; |
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27 | Tbht_history_t predictor_0_bht_history =0, predictor_1_bht_history =0, predictor_2_bht_history =0; |
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28 | Tcontrol_t predictor_0_pht_direction=0, predictor_1_pht_direction=0, predictor_2_pht_direction=0; |
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29 | Tcontrol_t predictor_0_bht_direction=0, predictor_1_bht_direction=0, predictor_2_bht_direction=0; |
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30 | Tcontrol_t predictor_0_direction, predictor_1_direction, predictor_2_direction; |
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31 | Tcontrol_t predictor_direction; |
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32 | |
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33 | if (_param._predictor_2_have_pht) |
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34 | { |
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35 | predictor_2_pht_history = PORT_READ(in_PREDICT_PREDICTOR_2_PHT_HISTORY [i]); |
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36 | predictor_2_pht_direction = predictor_2_pht_history >> (_param._predictor_2_pht_size_counter-1); |
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37 | history |= (predictor_2_pht_history << _param._shift_5); |
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38 | } |
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39 | if (_param._predictor_2_have_bht) |
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40 | { |
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41 | predictor_2_bht_history = PORT_READ(in_PREDICT_PREDICTOR_2_BHT_HISTORY [i]); |
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42 | predictor_2_bht_direction = predictor_2_bht_history >> (_param._predictor_2_bht_size_shifter-1); |
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43 | history |= (predictor_2_bht_history << _param._shift_4); |
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44 | } |
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45 | |
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46 | predictor_2_direction = (_param._predictor_2_have_pht==true)?predictor_2_pht_direction:predictor_2_bht_direction; |
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47 | |
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48 | if (_param._have_meta_predictor) |
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49 | { |
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50 | if (_param._predictor_1_have_pht) |
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51 | { |
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52 | predictor_1_pht_history = PORT_READ(in_PREDICT_PREDICTOR_1_PHT_HISTORY [i]); |
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53 | predictor_1_pht_direction = predictor_1_pht_history >> (_param._predictor_1_pht_size_counter-1); |
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54 | history |= (predictor_1_pht_history << _param._shift_3); |
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55 | } |
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56 | if (_param._predictor_1_have_bht) |
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57 | { |
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58 | predictor_1_bht_history = PORT_READ(in_PREDICT_PREDICTOR_1_BHT_HISTORY [i]); |
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59 | predictor_1_bht_direction = predictor_1_bht_history >> (_param._predictor_1_bht_size_shifter-1); |
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60 | history |= (predictor_1_bht_history << _param._shift_2) ; |
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61 | } |
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62 | if (_param._predictor_0_have_pht) |
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63 | { |
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64 | predictor_0_pht_history = PORT_READ(in_PREDICT_PREDICTOR_0_PHT_HISTORY [i]); |
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65 | predictor_0_pht_direction = predictor_0_pht_history >> (_param._predictor_0_pht_size_counter-1); |
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66 | history |= (predictor_0_pht_history << _param._shift_1); |
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67 | } |
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68 | if (_param._predictor_0_have_bht) |
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69 | { |
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70 | predictor_0_bht_history = PORT_READ(in_PREDICT_PREDICTOR_0_BHT_HISTORY [i]); |
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71 | predictor_0_bht_direction = predictor_0_bht_history >> (_param._predictor_0_bht_size_shifter-1); |
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72 | history |= (predictor_0_bht_history << _param._shift_0); |
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73 | } |
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74 | |
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75 | predictor_0_direction = (_param._predictor_0_have_pht==true)?predictor_0_pht_direction:predictor_0_bht_direction; |
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76 | predictor_1_direction = (_param._predictor_1_have_pht==true)?predictor_1_pht_direction:predictor_1_bht_direction; |
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77 | |
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78 | // Meta predictor : take direction of prediction_2 and select the good predictor. |
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79 | predictor_direction = (predictor_2_direction==0)?predictor_0_direction:predictor_1_direction; |
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80 | |
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81 | log_printf(TRACE,Meta_Predictor_Glue,"genMealy_predict_history","predict_direction = %d - predictor(_0 %d, _1 %d, _2 %d)",predictor_direction,predictor_0_direction,predictor_1_direction,predictor_2_direction); |
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82 | } |
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83 | else |
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84 | { |
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85 | predictor_direction = predictor_2_direction; |
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86 | log_printf(TRACE,Meta_Predictor_Glue,"genMealy_predict_history","predict_direction = %d - predictor_2 %d",predictor_direction,predictor_2_direction); |
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87 | } |
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88 | |
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89 | PORT_WRITE(out_PREDICT_DIRECTION [i], predictor_direction); |
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90 | PORT_WRITE(out_PREDICT_HISTORY [i], history ); |
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91 | } |
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92 | |
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93 | log_printf(FUNC,Meta_Predictor_Glue,"genMealy_predict_history","End"); |
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94 | }; |
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95 | |
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96 | }; // end namespace meta_predictor_glue |
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97 | }; // end namespace meta_predictor |
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98 | }; // end namespace predictor |
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99 | }; // end namespace stage_1_ifetch |
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100 | }; // end namespace behavioural |
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101 | }; // end namespace morpheo |
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102 | #endif |
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