[78] | 1 | #ifdef SYSTEMC |
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| 2 | /* |
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| 3 | * $Id: Return_Address_Stack_genMealy_decod.cpp 81 2008-04-15 18:40:01Z 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_decod" |
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| 22 | void Return_Address_Stack::genMealy_decod (void) |
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| 23 | { |
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| 24 | log_printf(FUNC,Return_Address_Stack,FUNCTION,"Begin"); |
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| 25 | |
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| 26 | #ifdef DEBUG_TEST |
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| 27 | bool context_valid [_param->_nb_context]; |
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| 28 | for (uint32_t i=0; i<_param->_nb_context; i++) |
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| 29 | context_valid [i] = true; |
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| 30 | #endif |
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| 31 | |
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| 32 | for (uint32_t i=0; i<_param->_nb_inst_decod; i++) |
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| 33 | { |
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| 34 | Tcontext_t context = (_param->_have_port_context_id)?PORT_READ(in_DECOD_CONTEXT_ID [i]):0; |
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| 35 | |
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| 36 | #ifdef DEBUG_TEST |
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| 37 | if (PORT_READ(in_DECOD_VAL [i])) |
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| 38 | { |
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| 39 | if (context_valid[context] == false) |
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| 40 | ERRORMORPHEO(FUNCTION,"Can't have 2 transactions with the same context_id"); |
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| 41 | context_valid[context] = false; |
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| 42 | } |
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| 43 | #endif |
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| 44 | |
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| 45 | Tptr_t top = reg_TOP[context]; |
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| 46 | Tcontrol_t push = PORT_READ(in_DECOD_PUSH [i]); |
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| 47 | |
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| 48 | // if push : value is hit |
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| 49 | // if pop : val and not miss |
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[81] | 50 | // when the predictor : if hit = 0, wait (is not accurate) |
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| 51 | internal_DECOD_HIT [i] = (push or (reg_stack[context][top]._val and not reg_stack[context][top]._miss and (reg_NB_ELT[context]>0))); |
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[78] | 52 | PORT_WRITE(out_DECOD_HIT [i], internal_DECOD_HIT [i]); |
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| 53 | |
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| 54 | // if pop : address_pop = stack [top] |
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| 55 | // if push : stock [top+1] = address_push; also stock [top+1] is erase ! give the old value at the update table |
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| 56 | if (push) |
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| 57 | top = (top+1)%_param->_size_queue[context]; |
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| 58 | |
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| 59 | PORT_WRITE(out_DECOD_ADDRESS_POP [i], reg_stack[context][top]._address); |
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| 60 | PORT_WRITE(out_DECOD_INDEX [i], top); |
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| 61 | } |
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| 62 | |
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| 63 | log_printf(FUNC,Return_Address_Stack,FUNCTION,"End"); |
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| 64 | }; |
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| 65 | |
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| 66 | }; // end namespace return_address_stack |
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| 67 | }; // end namespace prediction_unit |
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| 68 | }; // end namespace front_end |
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| 69 | }; // end namespace multi_front_end |
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| 70 | }; // end namespace core |
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| 71 | }; // end namespace behavioural |
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| 72 | }; // end namespace morpheo |
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| 73 | #endif |
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