source: trunk/IPs/systemC/processor/Morpheo/Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Rename_unit/Register_translation_unit/Register_Address_Translation_unit/src/Register_Address_Translation_unit_transition.cpp @ 78

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

#include "Behavioural/Core/Multi_OOO_Engine/OOO_Engine/Rename_unit/Register_translation_unit/Register_Address_Translation_unit/include/Register_Address_Translation_unit.h"

namespace morpheo                    {
namespace behavioural {
namespace core {
namespace multi_ooo_engine {
namespace ooo_engine {
namespace rename_unit {
namespace register_translation_unit {
namespace register_address_translation_unit {


#undef  FUNCTION
#define FUNCTION "Register_Address_Translation_unit::transition"
  void Register_Address_Translation_unit::transition (void)
  {
    log_printf(FUNC,Register_Address_Translation_unit,FUNCTION,"Begin");

    if (PORT_READ(in_NRESET) == 0)
      {
        uint32_t gpr = 1;
        uint32_t spr = 0;

        for (uint32_t i=0; i<_param->_nb_front_end; i++)
          for (uint32_t j=0; j<_param->_nb_context[i]; j++)
            {
              rat_gpr [i][j][0] = 0;

              for (uint32_t k=1; k<_param->_nb_general_register_logic; k++)
                rat_gpr [i][j][k] = gpr++;
              for (uint32_t k=0; k<_param->_nb_special_register_logic; k++)
                rat_spr [i][j][k] = spr++;
            }
      }
    else
      {
        // Note : GPR[0] is never write (in decod's stage : write_rd = 0 when num_reg_rd_log == 0)

        // =====================================================
        // ====[ INSERT ]=======================================
        // =====================================================
        // First : interface insert
        for (uint32_t i=0; i<_param->_nb_inst_insert; i++)
          // Test transaction
          if (PORT_READ(in_INSERT_VAL [i]) and internal_INSERT_ACK  [i])
            {
              Tcontext_t front_end_id = (_param->_have_port_front_end_id)?PORT_READ(in_RENAME_FRONT_END_ID [i]):0;
              Tcontext_t context_id   = (_param->_have_port_context_id  )?PORT_READ(in_RENAME_CONTEXT_ID   [i]):0;
              
              // Test if write
              if (PORT_READ(in_INSERT_WRITE_RD [i]) == 1)
                rat_gpr[front_end_id][context_id][PORT_READ(in_INSERT_NUM_REG_RD_LOG [i])] = PORT_READ(in_INSERT_NUM_REG_RD_PHY [i]);
              if (PORT_READ(in_INSERT_WRITE_RE [i]) == 1)
                rat_spr[front_end_id][context_id][PORT_READ(in_INSERT_NUM_REG_RE_LOG [i])] = PORT_READ(in_INSERT_NUM_REG_RE_PHY [i]);
            }

        // =====================================================
        // ====[ RETIRE ]=======================================
        // =====================================================
        // Second : interface retire
        //  (because if an event on the same thread : the instruction is already renamed)
        for (uint32_t i=0; i<_param->_nb_inst_retire; i++)
          if (PORT_READ(in_RETIRE_VAL [i]) and internal_RETIRE_ACK [i])
            {
              // if no event : no effect, because the RAT content the most recently register
              // but if they have a event (exception or miss speculation), the rat must restore the oldest value
              // To restore the oldest valid value, we use the rat_update_table. if the bit is unset, also they have none update on this register
              // the retire interface became of the Re Order Buffer, also is in program sequence !
              if (PORT_READ(in_RETIRE_EVENT_STATE [i]) != EVENT_STATE_NO_EVENT)
                {
                  Tcontext_t         front_end_id = (_param->_have_port_front_end_id)?PORT_READ(in_RETIRE_FRONT_END_ID [i]):0;
                  Tcontext_t         context_id   = (_param->_have_port_context_id  )?PORT_READ(in_RETIRE_CONTEXT_ID   [i]):0;

                  // Test if event have just occure
                  if (PORT_READ(in_RETIRE_EVENT_STATE [i]) == EVENT_STATE_EVENT)
                    {
                      // Reset update_table
                      for (uint32_t j=0; j<_param->_nb_general_register_logic; j++)
                        rat_gpr_update_table[front_end_id][context_id][j] = 0;
                      for (uint32_t j=0; j<_param->_nb_special_register_logic; j++)
                        rat_spr_update_table[front_end_id][context_id][j] = 0;
                    }

 
                  // Test if write and have not a previous update
                  if (PORT_READ(in_RETIRE_WRITE_RD [i]) == 1)
                    {
                      Tgeneral_address_t rd_log = PORT_READ(in_RETIRE_NUM_REG_RD_LOG [i]);
                      
                      log_printf(NONE,Register_Address_Translation_unit,FUNCTION,"retire[%d]",i);
                      log_printf(NONE,Register_Address_Translation_unit,FUNCTION," * front_end_id : %d",front_end_id);
                      log_printf(NONE,Register_Address_Translation_unit,FUNCTION," * context_id   : %d",context_id  );
                      log_printf(NONE,Register_Address_Translation_unit,FUNCTION," * rd_log       : %d",rd_log      );
                      
                      if (rat_gpr_update_table[front_end_id][context_id][rd_log] == 0)
                        {
                          rat_gpr             [front_end_id][context_id][rd_log] = PORT_READ(in_RETIRE_NUM_REG_RD_PHY_OLD [i]);
                          rat_gpr_update_table[front_end_id][context_id][rd_log] = 1;
                        }
                    }

                  if (PORT_READ(in_RETIRE_WRITE_RE [i]) == 1)
                    {
                      Tspecial_address_t re_log = PORT_READ(in_RETIRE_NUM_REG_RE_LOG [i]);

                      if (rat_spr_update_table[front_end_id][context_id][re_log] == 0)
                        {
                          rat_spr             [front_end_id][context_id][re_log] = PORT_READ(in_RETIRE_NUM_REG_RE_PHY_OLD [i]);
                          rat_spr_update_table[front_end_id][context_id][re_log] = 1;
                        }
                    }
                }
            }
      }

#if defined(STATISTICS) or defined(VHDL_TESTBENCH)
    end_cycle ();
#endif

    log_printf(FUNC,Register_Address_Translation_unit,FUNCTION,"End");
  };

}; // end namespace register_address_translation_unit
}; // end namespace register_translation_unit
}; // end namespace rename_unit
}; // end namespace ooo_engine
}; // end namespace multi_ooo_engine
}; // end namespace core

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