Function highest_bit

src/fl/gfx/gamma_lut.h:71–73

}

constexpr int highest_bit(u32 v) FL_NOEXCEPT {
    return v == 0 ? -1 : hb_step(v, 0);
}

// ---- Fixed-point log2 (signed result, negative for inputs < 1.0) ----
// Uses 4-term minimax polynomial for log2(1+t), t in [0,1).