Function scale_last_dim

src/models/vevo2/components.cpp:546–556

    const auto v = source.require_f32(prefix + ".weight_v", {out_channels, in_channels, kernel_size});
    std::vector<float> weight(v.size());
    const int64_t row_size = in_channels * kernel_size;
    for (int64_t out = 0; out < out_channels; ++out) {
        double sum = 0.0;
        const int64_t base = out * row_size;
        for (int64_t i = 0; i < row_size; ++i) {
            const float value = v[static_cast<size_t>(base + i)];
            sum += static_cast<double>(value) * static_cast<double>(value);
        }
        const double norm = std::sqrt(sum);
        if (norm == 0.0) {
            throw std::runtime_error("Vevo2 weight-norm tensor has zero norm: " + prefix);
        }
        const float scale = static_cast<float>(static_cast<double>(g[static_cast<size_t>(out)]) / norm);
        for (int64_t i = 0; i < row_size; ++i) {