pow()

template<typename Derived, int IntBits, int FracBits>

static FASTLED_FORCE_INLINE Derived fl::fixed_point_base< Derived, IntBits, FracBits >::pow ( Derived base, Derived exp )

inlinestatic

Definition at line 234 of file base.h.

                                                                       {
        if (base.mValue <= 0) return Derived();
        constexpr Derived one(1.0f);
        if (exp.mValue == 0) return one;
        if (base == one) return one;
        // Snap base values within ~2 ULPs of 1.0 to exactly 1.0 to dodge the
        // log2(1+t) minimax polynomial's upper-endpoint residual (off by
        // 0.000443 at t=1, which amplifies via exp2 to ~50-100 LSB at u16
        // scale). See #2969.
        constexpr raw_type kNearOneEpsilon = static_cast<raw_type>(2);
        constexpr raw_type kOneRaw = static_cast<raw_type>(Derived::SCALE);
        if (base.mValue >= static_cast<raw_type>(kOneRaw - kNearOneEpsilon) &&
            base.mValue <= kOneRaw) {
            return one;
        }
        return exp2_fp(exp * log2_fp(base));
    }

References fl::exp(), exp2_fp(), FASTLED_FORCE_INLINE, and log2_fp().

Here is the call graph for this function: