in gad/src/array_compare.rs [123:139]
fn max_as(&mut self, v: &Value<D>, rdims: Dims) -> Result<Value<D>> {
let result = self.eval().max_as(v.data(), rdims)?;
let value = self.make_node(result, vec![v.input()], {
let v = v.clone();
move |graph, store, gradient| {
if let Some(id) = v.id() {
let v = graph.link(&v);
let mask = graph.argmax_as(v, rdims)?;
let tiled = graph.tile_as(&gradient, v.dims())?;
let grad = graph.mul(&tiled, &mask)?;
store.add_gradient::<D, _>(graph, id, &grad)?;
}
Ok(())
}
});
Ok(value)
}