For project 2 you are provided with a C++ class file ALU.cpp/.h which uses the enum function. Look at the source code and list the possible values that you can use for ALU_OP.

ALU.h:

#ifndef __ALU_H

#define __ALU_H

#include

#include

#include

#include

#include "Debug.h"

using namespace std;

enum ALU_OP { ADD, AND, SHF_L, SHF_R, CMP_LT, MUL, DIV };

class ALU {

private:

uint32_t upper, lower;

public:

uint32_t op(ALU_OP op, uint32_t src1, uint32_t src2);

uint32_t getUpper() const { return upper; }

uint32_t getLower() const { return lower; }

};

#endif

ALU.CPP:

#include "ALU.h"

uint32_t ALU::op(ALU_OP op, uint32_t src1, uint32_t src2) {

switch(op) {

case ADD : return (signed)src1 + (signed)src2;

case AND : return src1 & src2;

case SHF_L : return src1 << src2;

case SHF_R : return (signed)src1 >> src2;

case CMP_LT: return ((signed)src1 < (signed)src2) ? 1 : 0;

case MUL : {

uint64_t wide = (uint64_t)src1 * (uint64_t)src2;

lower = wide & 0xffffffff;

upper = wide >> 32;

}

break;

case DIV : if(src2 == 0) {

cerr << "division by zero!" << endl;

exit(-1);

}

lower = src1 / src2;

upper = src1 % src2;

break;

default: cerr << "unimplemented ALU operation: op = " << dec << op << endl;

}

return 0;

}