SMaP_Number operator*(const SMaP_Number &lhs, const SMaP_Number &rhs)
{
SMaP_Number result = SMaP_Number();
__int32 lhsVal = lhs.val;
__int32 rhsVal = rhs.val;
//preconditional overflow test
unsigned __int8 lhsBits = highestOneBitPosition(lhsVal);
unsigned __int8 rhsBits = highestOneBitPosition(rhsVal);
if (lhsBits + rhsBits > VAL_SIZE)
{
result.dataRange = true;
}
//TODO: get logic to find case where result would be too small
else
{
result = SMaP_Number(lhsVal * rhsVal);
}
return result;
}
bool multiplication_is_safe(const unsigned long long a,const unsigned long long b) {
size_t a_bits=highestOneBitPosition(a), b_bits=highestOneBitPosition(b);
return (a_bits+b_bits<=n_bits);
}
bool ms(unsigned long long a, unsigned long long b) {
int a_bits=highestOneBitPosition(a), b_bits=highestOneBitPosition(b);
return (a_bits+b_bits <= 64);
}
bool addition_is_safe(uint16_t a, uint16_t b) {
size_t a_bits=highestOneBitPosition(a), b_bits=highestOneBitPosition(b);
return (a_bits<32 && b_bits<32);
}