#include "../Iinstr.hpp"


class Cldw : public Iinstr {
	public:
		Cldw();
		void evalInstr();
		void execInstr();
		std::string toString();
		Iinstr* getNew();
};

/**
 * Name:      create_instruction
 * Purpose:   if compiled as shared library, this functions creates the 
              instruction object

 * Returns:   pointer to instruction object
 */
extern "C" Iinstr* create_instruction() {
    return new Cldw();
}

Iinstr* Cldw::getNew()
{
    return new Cldw();
}

/**
 * Name:      destroy_instruction
 * Purpose:   if compiled as shared library, this functions destoys the 
              instruction object

 * Parameter: IInstruction - the instruction object to delete
 */
extern "C" void destroy_instruction(Iinstr* p) {
    delete p;
}

Cldw::Cldw()
{
	opcode = B5(01110);
	name = "ldw";
}

void Cldw::evalInstr()
{
	this->m_s = true;

	dynamic_bitset<> immb = argbits;
	immb.resize(15);
	this->m_imm = this->generate15ImmSign(immb.to_ulong());

	argbits >>= 15;
	m_ra = this->getRegister(argbits);
	argbits >>= 4;
	m_rd = this->getRegister(argbits);

}

void Cldw::execInstr()
{
	cout << "should exec " << this->toString() << endl;
	CDat val = this->m_cpu->getRegister(this->m_ra);
	val += m_imm;
	val = this->m_cpu->getRAM(val);
	this->m_cpu->setRegister(this->m_rd,val);
}

std::string Cldw::toString()
{
	stringstream op;
	op << this->getName();

	op << this->getConditionFlag() << " r" << m_rd << ", " << m_imm << "(r" <<  m_ra << ")";

	return op.str();
}