source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/Two_Level_Branch_Predictor_Glue/src/Two_Level_Branch_Predictor_Glue_vhdl_body.cpp @ 48

#ifdef VHDL
/*
 * $Id$
 *
 * [ Description ]
 * 
 */

#include "Behavioural/Core/Multi_Front_end/Front_end/Prediction_unit/Direction/Meta_Predictor/Two_Level_Branch_Predictor/Two_Level_Branch_Predictor_Glue/include/Two_Level_Branch_Predictor_Glue.h"

namespace morpheo                    {
namespace behavioural {
namespace core {
namespace multi_front_end {
namespace front_end {
namespace prediction_unit {
namespace direction {

namespace meta_predictor {
namespace two_level_branch_predictor {
namespace two_level_branch_predictor_glue {


  void Two_Level_Branch_Predictor_Glue::vhdl_body (Vhdl * & vhdl)
  {
    log_printf(FUNC,Two_Level_Branch_Predictor_Glue,"vhdl_body","Begin");

    vhdl->set_body ("-- ack output");
    for (uint32_t i=0; i<_param._nb_prediction; i++)
      {
        string bht_ack, pht_ack;

        if (_param._have_bht)
          bht_ack = "in_PREDICT_"+toString(i)+"_BHT_ACK";
        else
          bht_ack = "'1'";

        if (_param._have_pht)
          pht_ack = "in_PREDICT_"+toString(i)+"_PHT_ACK";
        else
          pht_ack = "'1'";

        vhdl->set_body ("out_PREDICT_"+toString(i)+"_ACK         <= "+bht_ack+" and "+pht_ack+";");
      }

    for (uint32_t i=0; i<_param._nb_branch_complete; i++)
      {
        string bht_ack, pht_ack;

        if (_param._have_bht)
          bht_ack = "in_BRANCH_COMPLETE_"+toString(i)+"_BHT_ACK";
        else
          bht_ack = "'1'";

        if (_param._have_pht)
          pht_ack = "in_BRANCH_COMPLETE_"+toString(i)+"_PHT_ACK";
        else
          pht_ack = "'1'";

        vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_ACK <= "+bht_ack+" and "+pht_ack+";");
      }
    
    vhdl->set_body ("");
    vhdl->set_body ("-- address output");

    for (uint32_t i=0; i<_param._nb_prediction; i++)
      {
        // The address is higher than the address size of bht
        if (_param._have_bht)
          vhdl->set_body ("out_PREDICT_"+toString(i)+"_BHT_ADDRESS <= in_PREDICT_"+toString(i)+"_ADDRESS"+std_logic_range(_param._bht_size_address)+";");

        if (_param._have_pht)
          {
            // For pht : 2 cases
            if (_param._have_bht)
              {
                uint32_t min = 0;
                uint32_t max = _param._pht_size_address;

                // A lot of case :
                //
                //      pht_size_addr
                // addr             bht_history
                //
                // ---------] |
                //            |[---------
                //
                // -----------|----]               share
                //            |  [-------
                //
                // -----------|----]            no share
                //            |     [-----
                //
                
                // Test if address is share 
                if (_param._pht_size_address_shift > 0)
                  {
                    min = _param._pht_size_address_shift;
                    vhdl->set_body ("out_PREDICT_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(min) + " <=  in_PREDICT_"+toString(i)+"_BHT_HISTORY"+std_logic_range(min)+";");
                  }

                if (_param._bht_size_history < _param._pht_size_address)
                  {
                    max = _param._bht_size_history;
                    vhdl->set_body ("out_PREDICT_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(_param._pht_size_address-1,max) + " <=  in_PREDICT_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address-1-_param._pht_size_address_shift, _param._pht_size_address_share)+";");
                  }
                
                // intersection
                if (_param._pht_size_address_share > 0)
                  vhdl->set_body ("out_PREDICT_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(max-1,min) + " <=  in_PREDICT_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address_share-1,0)+" xor in_PREDICT_"+toString(i)+"_BHT_HISTORY"+std_logic_range(max-1,min)+";");
              }
            else
              vhdl->set_body ("out_PREDICT_"+toString(i)+"_PHT_ADDRESS <=  in_PREDICT_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address)+";");
          }
      }

    for (uint32_t i=0; i<_param._nb_branch_complete; i++)
      {
        // The address is higher than the address size of bht
        if (_param._have_bht)
          vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_BHT_ADDRESS <= in_BRANCH_COMPLETE_"+toString(i)+"_ADDRESS"+std_logic_range(_param._bht_size_address)+";");

        if (_param._have_pht)
          {
            // For pht : 2 cases
            if (_param._have_bht)
              {
                uint32_t min = 0;
                uint32_t max = _param._pht_size_address;

                // Test if address is share 
                if (_param._pht_size_address_shift > 0)
                  {
                    min = _param._pht_size_address_shift;
                    vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(min) + " <=  in_BRANCH_COMPLETE_"+toString(i)+"_BHT_HISTORY"+std_logic_range(min)+";");
                  }

                if (_param._bht_size_history < _param._pht_size_address)
                  {
                    max = _param._bht_size_history;
                    vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(_param._pht_size_address-1,max) + " <=  in_BRANCH_COMPLETE_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address-1-_param._pht_size_address_shift, _param._pht_size_address_share)+";");
                  }
                
                // intersection
                if (_param._pht_size_address_share > 0)
                  vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_PHT_ADDRESS"+std_logic_range(max-1,min) + " <=  in_BRANCH_COMPLETE_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address_share-1,0)+" xor in_BRANCH_COMPLETE_"+toString(i)+"_BHT_HISTORY"+std_logic_range(max-1,min)+";");
              }
            else
              vhdl->set_body ("out_BRANCH_COMPLETE_"+toString(i)+"_PHT_ADDRESS <=  in_BRANCH_COMPLETE_"+toString(i)+"_ADDRESS"+std_logic_range(_param._pht_size_address)+";");
          }
      }

    log_printf(FUNC,Two_Level_Branch_Predictor_Glue,"vhdl_body","End");
  };

}; // end namespace two_level_branch_predictor_glue
}; // end namespace two_level_branch_predictor
}; // end namespace meta_predictor

}; // end namespace core
}; // end namespace multi_front_end
}; // end namespace front_end
}; // end namespace prediction_unit
}; // end namespace direction


}; // end namespace behavioural
}; // end namespace morpheo              
#endif