forward.h

SystemC 实现 MIPS 处理器 源代码

#ifndef FORWARD_H
#define FORWARD_H

#include "STDAFX.h"

SC_MODULE(Forward)
{
	sc_in<sc_uint<5> > EX_MEM_RegRd,MEM_WB_RegRd;
	sc_in<sc_uint<5> > rs,rt;
	sc_in<bool> ALUSrc;
	sc_in<bool> MemtoReg;

	sc_out<sc_uint<2> > ForwardA,ForwardB;

	void entry()
	{
		ForwardA.write(0);
		if (rs.read()==EX_MEM_RegRd.read()) 
			ForwardA.write(1);
		if (rs.read()==MEM_WB_RegRd.read())
		{
			if (MemtoReg==1)
				ForwardA.write(2);
			else 
				ForwardA.write(3);
		}

		ForwardB.write(0);
		if (rt.read()==EX_MEM_RegRd.read() && ALUSrc.read()==0) 
			ForwardB.write(1);
		if (rt.read()==MEM_WB_RegRd.read() && ALUSrc.read()==0)
		{
			if (MemtoReg==1)
				ForwardB.write(2);
			else
				ForwardB.write(3);
		}
	}

	SC_CTOR(Forward)
	{
		SC_METHOD(entry);
		sensitive<<rs<<rt<<EX_MEM_RegRd<<MEM_WB_RegRd;
	}
};




#endif