src/systemc/tests/systemc/misc/user_guide/chpt7.2/adder_sub.cpp

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/*****************************************************************************

  adder_sub.cpp -- 

  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15

 *****************************************************************************/

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/* Filename adder_sub.cc */
/* This is the implementation file for synchronous process `adder_sub' */

#include "adder_sub.h"

int add(int a, int b)
{
  return (a + b);
}

void adder_sub::entry()
{
  int sum;
  int a, b, c, d;

  while (true) {
    // Wait until you get signal to go
    do { wait(); } while (adder_sub_ready != true);
    // Read inputs
    a = Sa.read();
    b = Sb.read();
    c = Sc.read();
    
    // Perform the computation.
    sum = add(a, b);
    sum = add(sum, c);
    d = a - b;

    // Write outputs
    adder_sub_done.write(true);
    Ssum.write(sum);
    Sd.write(d);
    wait();
    adder_sub_done.write(false);
    // Loop back to do { wait(); } while . 
  }

} // end of entry function