Function getDoubleNegative11

src/backend/cpu/kernel/random_engine.hpp:171–178

Generates rationals in [-1, 1)

// Generates rationals in [-1, 1)
double getDoubleNegative11(uint *val, uint index) {
    intl v = transform<intl>(val, index);
    // Conversion to doubles adapted from Random123
    constexpr double signed_factor =
        ((1.0l) / (std::numeric_limits<long long>::max() + (1.0l)));
    constexpr double half_factor = ((0.5) * signed_factor);
    return fma(v, signed_factor, half_factor);
}

#define MAX_RESET_CTR_VAL 64
#define WRITE_STRIDE 256