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License: MIT License
Simple header-only library for Fixed-Point Number operations
License: MIT License
During doing arithmetic operation, if the resulting number exceeds the min/max range, it should be set to min/max.
Originally, only one main instruction. This may be faster on modern CPU even if it's floating point number multiplication.
d /= (double)(1ULL << FRAC_BIT_LEN);
Beside, bit-operation method uses a while-loop, it may be a bigger burden than floating point number multiplication.
Inside
template<int INT_BIT_LEN, int FRAC_BIT_LEN>
template<int T1, int T2>
FixedPointNumber<INT_BIT_LEN, FRAC_BIT_LEN> FixedPointNumber<INT_BIT_LEN, FRAC_BIT_LEN>::operator* (const FixedPointNumber<T1, T2> &rhs) const
The bits behind LSB are discarded, but it's better to round it to LSB.
FixedPointNumber res;
uint64_t product = lv * rv;
product >>= T2; // No rounding here
is incomplete:
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