void operator ()(const tensor_type &delta, const tensor_type &x, tensor_type &x_gradient) {
CHECK_EQ(x.order(), delta.order());
// TODO(robertsdionne): Support arbitrary tensor order with an n-dimensional iterator.
for (auto i = 0; i < x.shape().at(0); ++i) {
for (auto j = 0; j < x.shape().at(1); ++j) {
x_gradient.set({i, j}, delta.at({i, j}) * (x.at({i, j}) > F(0)));
}
}
}
void operator ()(const tensor_type &x, tensor_type &y) {
using std::max;
CHECK_EQ(x.order(), y.order());
// TODO(robertsdionne): Support arbitrary tensor order with an n-dimensional iterator.
for (auto i = 0; i < x.shape().at(0); ++i) {
for (auto j = 0; j < x.shape().at(1); ++j) {
y.set({i, j}, max(F(0), x.at({i, j})));
}
}
}
