src/systemc/tests/systemc/misc/communication/channel/hwsw/hwsw.cpp

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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/*****************************************************************************

  hwsw.cpp -- 

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

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

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#include "systemc.h"

static int randa[] = { 3278, 3420, 1349, 13491, 9234028, 234902,
                       13971, 1498710, 1348179, 1389810, 190101, 92384 };
static int randb[] = { 1349, 20893, 2090092, 8813, 87472, 73231,
                       59413, 42713, 3192, 45653, 565643, 78931, 573231 };
static int randc[] = { 3419, 82093, 9013, 1831, 74372, 233861,
                       421313, 47823, 3902192, 93245653, 77565643, 77234, 10192 };

SC_MODULE( adder_sub )
{
  SC_HAS_PROCESS( adder_sub );

  sc_in_clk clk;

  sc_fifo<int>& Sa; //input
  sc_fifo<int>& Sb; //input
  sc_fifo<int>& Sc; //input
  sc_fifo<int>& Sd; //output
  sc_fifo<int>& Ssum; //output

  // constructor 
  adder_sub( sc_module_name NAME,
	     sc_clock& CLK,
	     sc_fifo<int>& SA,
	     sc_fifo<int>& SB,
	     sc_fifo<int>& SC,
	     sc_fifo<int>& SD,
	     sc_fifo<int>& SSUM )
    : Sa(SA), Sb(SB), Sc(SC), Sd(SD), Ssum(SSUM)
  {
    clk(CLK);
	SC_THREAD( entry );
	sensitive << clk.pos();
  }

  // Process functionality in member function below
  void entry();
};


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

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

  while (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
    Ssum.write(sum);
    Sd.write(d);
    // Loop back to do { wait(); } while . 
  }

} // end of entry function

SC_MODULE( testbench )
{
  SC_HAS_PROCESS( testbench );

  sc_in_clk clk;

  sc_fifo<int>& Ssum; //input
  sc_fifo<int>& Sdiff; //input
  sc_fifo<int>& Sa; //output
  sc_fifo<int>& Sb; //output
  sc_fifo<int>& Sc; //output

  // constructor 
  testbench( sc_module_name NAME,
	     sc_clock& CLK,
	     sc_fifo<int>& SSUM,
	     sc_fifo<int>& SDIFF,
	     sc_fifo<int>& SA,
	     sc_fifo<int>& SB,
	     sc_fifo<int>& SC )
    : Ssum(SSUM), Sdiff(SDIFF), Sa(SA), Sb(SB), Sc(SC)
  {
    clk(CLK);
	SC_THREAD( entry );
	sensitive << clk.pos();
  }

  // Process functionality in member function below
  void entry();
};


void testbench::entry()
{
  int a, b, c, d;
  int sum;
  int i;
  char buf[BUFSIZ];

  for (i=0; i < 10; i++) {
    a = randa[i % (sizeof(randa)/sizeof(randa[0]))] & 0x0ff;
    b = randb[i % (sizeof(randb)/sizeof(randb[0]))] & 0x0ff;
    c = randc[i % (sizeof(randc)/sizeof(randc[0]))] & 0x0ff;

    Sa.write(a);
    Sb.write(b);
    Sc.write(c);
    sum = Ssum.read();
    d = Sdiff.read();
    // printf("A = %d, B = %d, C = %d, D = %d, SUM = %d\n", a, b, c, d, sum);
    sprintf(buf, "A = %d, B = %d, C = %d, D = %d, SUM = %d\n", a, b, c, d, sum);
    cout << buf;
  }
  sc_stop();

} // end of entry function

// Main routine

int sc_main(int ac, char *av[])
{
  sc_fifo<int> a;
  sc_fifo<int> b;
  sc_fifo<int> c;
  sc_fifo<int> d;
  sc_fifo<int> sum;
  sc_clock clock("Clock", 10, SC_NS, 0.5, 0, SC_NS, 0);

  testbench T("TB", clock, sum, d, a, b, c);
  adder_sub AS("AS", clock, a, b, c, d, sum);

  sc_start();
  return 0;
}