tract_core/ops/array/
broadcast.rs

1use crate::internal::*;
2
3#[derive(Debug, Clone, new, Hash)]
4pub struct MultiBroadcastTo {
5    pub shape: ShapeFact,
6}
7
8impl Op for MultiBroadcastTo {
9    fn name(&self) -> Cow<str> {
10        "MultiBroadcastTo".into()
11    }
12
13    op_as_typed_op!();
14}
15
16impl EvalOp for MultiBroadcastTo {
17    fn is_stateless(&self) -> bool {
18        true
19    }
20
21    fn eval_with_session(
22        &self,
23        session: &SessionState,
24        inputs: TVec<TValue>,
25    ) -> TractResult<TVec<TValue>> {
26        let shape = self.shape.eval_to_usize(&session.resolved_symbols)?;
27        Ok(tvec!(inputs[0].broadcast_to_shape(&shape)?.into_tvalue()))
28    }
29}
30
31impl TypedOp for MultiBroadcastTo {
32    fn output_facts(&self, inputs: &[&TypedFact]) -> TractResult<TVec<TypedFact>> {
33        ensure!(inputs.len() == 1);
34        let mut fact = inputs[0].datum_type.fact(self.shape.clone());
35        fact.uniform.clone_from(&inputs[0].uniform);
36        Ok(tvec!(fact))
37    }
38
39    fn concretize_dims(
40        &self,
41        _source: &TypedModel,
42        node: &TypedNode,
43        target: &mut TypedModel,
44        mapping: &HashMap<OutletId, OutletId>,
45        values: &SymbolValues,
46    ) -> TractResult<TVec<OutletId>> {
47        let input = mapping[&node.inputs[0]];
48        let op =
49            Self { shape: self.shape.iter().map(|d| d.eval(values)).collect::<TVec<_>>().into() };
50        target.wire_node(&node.name, op, &[input])
51    }
52
53    fn declutter(
54        &self,
55        model: &TypedModel,
56        node: &TypedNode,
57    ) -> TractResult<Option<TypedModelPatch>> {
58        let input_fact = model.outlet_fact(node.inputs[0])?;
59        if input_fact.shape == self.shape {
60            TypedModelPatch::shunt_one_op(model, node)
61        } else {
62            Ok(None)
63        }
64    }
65
66    as_op!();
67}
tract_core/ops/array/broadcast.rs

tract_core/ops/array/
broadcast.rs
