#include "systemc.h"
#include "sr.h"

void sr::shift()
{
	sc_int<4> t_r;

	r.write(0);
	while (1) {
		wait(); // wait for any signal on sensitivity list
		t_r = r;

		t_r[3] = t_r[2];
		t_r[2] = t_r[1];
		t_r[1] = t_r[0];
		t_r[0] = din;
		wait(2, SC_NS); // delay to produce outputs.
		r.write(t_r);
	}
}