Function reduce_fwd

dnn/src/naive/check_non_finite/opr_impl.cpp:11–30

#define wtype dt_int32

void reduce_fwd(const TensorNDArray& srcs, wtype* dptr, dt_float32 scale) {
    dptr[0] = 0;
    for (auto src : srcs) {
        auto sptr = src.ptr<dt_float32>();
        size_t size = src.layout.total_nr_elems();
        std::function<wtype(wtype, wtype)> func;
        func = [&](wtype l, wtype r) -> wtype {
            if (l + 1 < r) {
                wtype mid = l + (r - l) / 2;
                return func(l, mid) | func(mid, r);
            } else {
                auto val = std::isfinite(sptr[l]);
                if (val)
                    sptr[l] *= scale;
                return static_cast<wtype>(!val);
            }
        };
        dptr[0] |= func(0, size);
    }
}

}  // namespace