Subversion Repositories sxp

#include <iostream.h>

#include <stdlib.h>

#include <stdio.h>

class reg_file

{

  public:

    reg_file(unsigned number);

    void write_reg (unsigned addr, unsigned data, bool data_vld);

    unsigned read_reg (unsigned addr);

    bool valid_reg (unsigned addr);

    void print_regs();

    ~reg_file();

  protected:

    bool *valid;

    unsigned *reg;

    unsigned num_regs;

};

reg_file::reg_file(unsigned number)

{

  cout << "Begin regfile init, size = " << number << "\n";

  num_regs = number;

  valid = new bool[number];

  reg = new unsigned[number];

  for (unsigned i=0;i<number;i += 1)

    valid[i] = false;

  cout << "End regfile init\n";

  return;

}

void reg_file::write_reg (unsigned addr, unsigned data, bool data_vld)

{

  if(addr >= num_regs) {

    cout << "Invalid write address, addr = " << addr << ", max = " << num_regs-1 << ".\n";

    // throw an exception

    return;

  }

  else {

    valid[addr] = data_vld;

    reg[addr] = data;

    return;

  }

}

unsigned reg_file::read_reg (unsigned addr)

{

  if(addr >= num_regs) {

    cout << "Invalid read address, addr = " << addr << ", max = " << num_regs-1 << ".\n";

    // throw an exception

    return (0);

  }

  else

    if (valid[addr] == false) {

      return (0);

    }

    else

      return (reg[addr]);

}

bool reg_file::valid_reg (unsigned addr)

{

  if (addr >= num_regs)

    return (false);

  else

    return (valid[addr]);

}

void reg_file::print_regs()

{

  for (unsigned i=0;i<num_regs;i += 1) {

    printf ("Register %d  = ",i);

    if (valid_reg(i))

      printf ("%.8x\n",reg[i]);

    else

      printf ("xxxxxxxx\n");

  }

  return;

}

reg_file::~reg_file()

{

  delete [] reg;

  delete [] valid;

}

/*

 *  $Id: reg_file.cc,v 1.1 2001-10-29 00:43:05 samg Exp $

 *  Program  : reg_file.cc

 *  Author   : Sam Gladstone

 *  Function : reg file behavioral class for SXP processor

 *  $Log: not supported by cvs2svn $

 */