bool Unsigned::Greater(Unsigned& b)
{
bool ret_val = true;
assert(this->Width() == b.Width());
for(int idx = this->Width()-1; idx >= 0; idx--)
{
if((!this->Get_Bit(idx) && b.Get_Bit(idx)))
{
ret_val = false;
break;
}
else if(this->Get_Bit(idx) && !b.Get_Bit(idx))
break;
}
return(ret_val);
}
void Unsigned::Concatenate(Unsigned& b)
{
Unsigned tmp(_width + b._width);
for(int idx = 0; idx < b.Width(); idx++)
{
tmp.Set_Bit(idx, (b.Get_Bit(idx) ? true : false));
}
for(int idx = 0; idx < this->_width; idx++)
{
tmp.Set_Bit(idx + b.Width(), (this->Get_Bit(idx) ? true : false));
}
this->Swap(tmp);
}
void Unsigned::Add(Unsigned& b)
{
bool carry = false;
assert(this->_width == b.Width());
for(int idx = 0; idx < b.Width(); idx++)
{
bool abit = this->Get_Bit(idx);
bool bbit = b.Get_Bit(idx);
bool sum = (abit ^ bbit ^ carry);
this->Set_Bit(idx,sum);
carry = (abit & bbit) | ((abit | bbit) & carry);
}
this->Sign_Extend();
}