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alu.cpp
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#include "alu.h"
#include "constants.h"
#include "logger.h"
ALU::ALU(Controller* cont,QObject &appMgr) : controller(cont)
{
doAnimations = true;
continueAnim = false;
idle = false;
QObject::connect(this,SIGNAL(setGuiProperty(QString,QVariant)), &appMgr, SLOT(setGuiProperty(QString,QVariant)));
QObject::connect(&appMgr, SIGNAL(stepAnimation()), this, SLOT(stepAnimation()));
}
void ALU::add(sint value) {
setOperator("+");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
long long int precAccval = accval;
long long int precResult = precAccval + value;
sint result = accval + value;
sint flag = 0;
if(result == 0) flag += Constants::FLA_ZERO;
if(result < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
flag += getOfCaFlags(result, precResult);
setResult(result);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, result);
}
void ALU::subtract(sint value) {
setOperator("-");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
long long int precAccval = accval;
long long int precResult = precAccval - value;
sint result = accval - value;
sint flag = 0;
if(result == 0) flag += Constants::FLA_ZERO;
if(result < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
flag += getOfCaFlags(result,precResult);
setResult(result);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, result);
}
void ALU::multiply(sint value) {
setOperator("*");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
long long int precAccval = accval;
long long int precResult = precAccval * value;
sint result = accval * value;
sint flag = 0;
if(result == 0) flag += Constants::FLA_ZERO;
if(result < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
flag += getOfCaFlags(result,precResult);
setResult(result);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, result);
}
void ALU::divide(sint value) {
setOperator("/");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
long long int precAccval = accval;
long long int precResult = precAccval / value;
sint result = accval / value;
sint flag = 0;
if(result == 0) flag += Constants::FLA_ZERO;
if(result < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
flag += getOfCaFlags(result, precResult);
setResult(accval/value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval / value);
}
void ALU::And(sint value) {
setOperator("&");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint flag = 0;
if((accval & value) == 0) flag += Constants::FLA_ZERO;
if((accval & value) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(accval & value) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(accval & value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval & value);
}
void ALU::Or(sint value) {
setOperator("|");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint flag = 0;
if((accval | value) == 0) flag += Constants::FLA_ZERO;
if((accval | value) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(accval | value) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(accval | value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval | value);
}
void ALU::Xor(sint value) {
setOperator("^");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint flag = 0;
if((accval ^ value) == 0) flag += Constants::FLA_ZERO;
if((accval ^ value) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(accval ^ value) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(accval ^ value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval ^ value);
}
void ALU::rotL(sint value) {
setOperator("|<<|");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint s = value >= 0 ? value % 32 : -((-value)%32);
sint overflow = (accval >> (32 - s)) & (~(-1 << s));
sint result = (accval << s) | overflow;
sint flag = 0;
if((result) == 0) flag += Constants::FLA_ZERO;
if((result) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(result);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, result);
}
void ALU::rotR(sint value) {
setOperator("|>>|");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint s = value >= 0 ? value % 32 : -((-value)%32);
sint overflow = (accval << (32 - s));
sint result = ((accval >> s) & (~(-1 << (32 - s)))) | overflow;
sint flag = 0;
if((result) == 0) flag += Constants::FLA_ZERO;
if((result) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(result) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(result);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, result);
}
void ALU::shiL(sint value) {
setOperator("<<");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint flag = Constants::FLA_OVERFLOW;
if((accval << value) == 0) flag += Constants::FLA_ZERO;
if((accval << value) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(accval << value) % 2 == 1) flag += Constants::FLA_PARITY;
if(value < 33 && ((1 << (32 - value)) & accval) != 0) flag += Constants::FLA_CARRY;
setResult(accval << value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval << value);
}
void ALU::shiR(sint value) {
setOperator(">>");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
sint flag = 0;
if((accval >> value) == 0) flag += Constants::FLA_ZERO;
if((accval >> value) < 0) flag += Constants::FLA_SIGN;
if(this->countBits(accval & value) % 2 == 1) flag += Constants::FLA_PARITY;
setResult(accval >> value);
controller->setRegisterVal(Constants::REG_FLA,flag);
controller->setRegisterVal(Constants::REG_ACC, accval >> value);
}
void ALU::comp(sint value) {
setOperator("?");
setArg(value);
sint accval = controller->getRegisterVal(Constants::REG_ACC);
if(accval > value) {
controller->setLastCmp(Constants::CMP_LESS);
setResult(1);
} else if(accval < value){
controller->setLastCmp(Constants::CMP_GREATER);
setResult(-1);
} else if(accval == value) {
controller->setLastCmp(Constants::CMP_EQUAL);
setResult(0);
}
}
void ALU::toggleAnimations(bool newState) {
this->doAnimations = newState;
}
void ALU::setOperator(std::string op) {
emit setGuiProperty("operation",QVariant::fromValue(QString::fromStdString(op)));
}
void ALU::setArg(sint arg) {
if(doAnimations) emit setGuiProperty("busToAluActive",QVariant::fromValue(true));
sleep
emit setGuiProperty("operand",QVariant::fromValue(arg));
sleep
if(doAnimations) emit setGuiProperty("busToAluActive",QVariant::fromValue(false));
}
void ALU::setResult(sint res) {
if(doAnimations) emit setGuiProperty("aluActive",QVariant::fromValue(true));
sleep
emit setGuiProperty("result",QVariant::fromValue(res));
sleep
if(doAnimations) emit setGuiProperty("aluActive",QVariant::fromValue(false));
if(doAnimations) emit setGuiProperty("busFromAluActive",QVariant::fromValue(true));
sleep
if(doAnimations) emit setGuiProperty("busFromAluActive",QVariant::fromValue(false));
}
sint ALU::countBits(sint value) {
sint count = 0;
for(int i = 0; i < 32; ++i) {
if((value & (1 << i)) != 0) ++count;
}
return count;
}
sint ALU::getOfCaFlags(sint result, long long int realResult) {
sint flags = 0;
Logger::loggerInst->debug("Result: ", result);
Logger::loggerInst->debug("Real result: ", realResult);
if(realResult != result) {
flags += Constants::FLA_OVERFLOW;
long long int carrycheck = 1;
if(((carrycheck << 32) & realResult) != 0) {
flags += Constants::FLA_CARRY;
}
}
return flags;
}
void ALU::stepAnimation() {
if(idle) {
continueAnim = true;
}
}