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/*****************************************************************************
Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
more contributor license agreements. See the NOTICE file distributed
with this work for additional information regarding copyright ownership.
Accellera licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with the
License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. See the License for the specific language governing
permissions and limitations under the License.
*****************************************************************************/
/*****************************************************************************
popc.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:
*****************************************************************************/
#include "systemc.h"
/*
* Test bench
*/
SC_MODULE( proc1 )
{
SC_HAS_PROCESS( proc1 );
sc_in_clk clk;
// Inputs
sc_in<bool> data_ack;
sc_in<int> popc;
// Outputs
sc_out<bool> reset;
sc_out<bool> data_ready;
sc_out<int> in;
// Constructor
proc1( sc_module_name NAME,
sc_clock& CLK,
sc_signal<bool>& DATA_ACK,
sc_signal<int>& POPC,
sc_signal<bool>& RESET,
sc_signal<bool>& DATA_READY,
sc_signal<int>& IN_ )
{
clk(CLK);
data_ack(DATA_ACK); popc(POPC);
reset(RESET); data_ready(DATA_READY); in(IN_);
SC_CTHREAD( entry, clk.pos() );
}
// Process functionality goes here
void entry();
};
/*
* popc - The process doing the population count
*
*/
SC_MODULE( proc2 )
{
SC_HAS_PROCESS( proc2 );
sc_in_clk clk;
// Inputs
sc_in<bool> reset;
sc_in<bool> data_ready;
sc_in<int> in;
// Outputs
sc_out<bool> data_ack;
sc_out<int> popc;
// Internal variables
int c;
int t;
int no;
proc2( sc_module_name NAME,
sc_clock& CLK,
sc_signal<bool>& RESET,
sc_signal<bool>& DATA_READY,
sc_signal<int>& IN_,
sc_signal<bool>& DATA_ACK,
sc_signal<int>& POPC )
{
clk(CLK);
reset(RESET);
data_ready(DATA_READY);
in(IN_);
data_ack(DATA_ACK);
popc(POPC);
SC_CTHREAD( entry, clk.pos() );
reset_signal_is(reset,true);
c = 0;
t = 0;
}
// Process functionality
void entry();
};
/*
* Testbench functionality
*/
void proc1::entry()
{
int i;
int j;
j = 1;
i = 0;
data_ready.write(false);
reset.write(false);
wait();
while(true){
in.write(j);
data_ready.write(true);
do { wait(); } while (data_ack == false);
data_ready.write(false);
do { wait(); } while (data_ack == true);
char buf[BUFSIZ];
sprintf( buf, "Input: %7d Population Count: %3d", j, popc.read() );
cout << buf << endl;
i++;
if( i == 3){
reset.write(true);
wait();
reset.write(false);
wait(2);
}
if( i == 16)
sc_stop();
j = (j<<1)|1;
}
}
/*
* popc - functionality
*/
void proc2::entry()
{
// Reset behavior
no = 0;
data_ack.write(false);
wait();
while (true) {
do { wait(); } while (data_ready == false);
t = in.read();
c = 0;
while( t ){
c++;
t &= (t-1);
wait();
}
no++;
popc.write(c);
data_ack.write(true);
do { wait(); } while (data_ready == true);
data_ack.write(false);
}
}
int
sc_main(int argc, char *argv[])
{
sc_signal<bool> data_ready("Ready");
sc_signal<bool> data_ack("Ack");
sc_signal<int> in;
sc_signal<int> popc;
sc_signal<bool> reset;
sc_clock clock("CLOCK", 10, SC_NS, 0.5, 0.0, SC_NS);
proc1 TestBench("TestBench", clock, data_ack, popc, reset, data_ready, in);
proc2 Popc("Popc", clock, reset, data_ready, in, data_ack, popc);
// Create trace file
sc_trace_file *tf = sc_create_vcd_trace_file("tracefile");
// Trace signals
sc_trace(tf, data_ready, "data_ready");
sc_trace(tf, data_ack, "data_ack");
sc_trace(tf, in, "in");
sc_trace(tf, popc, "popc");
sc_trace(tf, reset, "reset");
// sc_trace(tf, clock.signal(), "Clock");
sc_trace(tf, clock, "Clock");
// Trace internal variables
sc_trace(tf, Popc.t, "Popc.t");
sc_trace(tf, Popc.c, "Popc.c");
sc_trace(tf, Popc.no, "Popc.no");
sc_start();
return 0;
}
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