[4] | 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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[5] | 37 | history |= (predictor_2_pht_history << _param._shift_5); |
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[4] | 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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[5] | 43 | history |= (predictor_2_bht_history << _param._shift_4); |
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[4] | 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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[5] | 54 | history |= (predictor_1_pht_history << _param._shift_3); |
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[4] | 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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[5] | 60 | history |= (predictor_1_bht_history << _param._shift_2) ; |
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[4] | 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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[5] | 66 | history |= (predictor_0_pht_history << _param._shift_1); |
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[4] | 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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[5] | 72 | history |= (predictor_0_bht_history << _param._shift_0); |
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[4] | 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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