1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
use tract_ndarray::*;
use crate::infer::*;
use crate::internal::*;
#[derive(Debug, Clone, new, Hash)]
pub struct ConstantOfShape {
scalar: Arc<Tensor>,
}
tract_linalg::impl_dyn_hash!(ConstantOfShape);
impl Op for ConstantOfShape {
fn name(&self) -> Cow<str> {
"ConstantOfShape".into()
}
fn info(&self) -> TractResult<Vec<String>> {
Ok(vec![format!("{:?}", self.scalar)])
}
op_hir!();
not_a_typed_op!();
not_a_pulsed_op!();
}
impl StatelessOp for ConstantOfShape {
fn eval(&self, inputs: TVec<Arc<Tensor>>) -> TractResult<TVec<Arc<Tensor>>> {
let shape = inputs[0].cast_to::<i64>().chain_err(|| TractErrorKind::StreamTensor)?;
let shape: TVec<usize> = shape.as_slice::<i64>()?.iter().map(|&x| x as usize).collect();
Ok(tvec!(dispatch_numbers!(make_from_shape(self.scalar.datum_type())(
&shape,
&*self.scalar
))?))
}
}
impl InferenceRulesOp for ConstantOfShape {
fn rules<'r, 'p: 'r, 's: 'r>(
&'s self,
s: &mut Solver<'r>,
inputs: &'p [TensorProxy],
outputs: &'p [TensorProxy],
) -> InferenceResult {
check_input_arity(&inputs, 1)?;
check_output_arity(&outputs, 1)?;
s.equals(&outputs[0].datum_type, self.scalar.datum_type())?;
s.equals(&inputs[0].rank, 1)?;
s.equals(&inputs[0].shape[0], outputs[0].rank.bex().to_dim())?;
Ok(())
}
fn to_typed(
&self,
_source: &InferenceModel,
node: &InferenceNode,
target: &mut TypedModel,
mapping: &HashMap<OutletId, OutletId>,
) -> TractResult<TVec<OutletId>> {
if let Some(ref fact) = target.outlet_fact(mapping[&node.inputs[0]])?.konst {
let shape = fact.cast_to::<i32>()?;
let shape = shape.as_slice::<i32>()?.iter().map(|&s| s as usize).collect::<TVec<_>>();
let value =
dispatch_copy!(make_from_shape(self.scalar.datum_type())(&*shape, &self.scalar))?;
return target.wire_node(&*node.name, crate::ops::konst::Const::new(value), &[]);
}
bail!("shape input is variable")
}
as_op!();
}
fn make_from_shape<T>(shape: &[usize], scalar: &Tensor) -> TractResult<Arc<Tensor>>
where
T: Datum + Copy,
{
Ok(Array::<T, _>::from_elem(&*shape, *scalar.to_scalar()?).into_arc_tensor())
}