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use crate::internal::*;
#[derive(Debug, Clone, new, Default)]
pub struct MultiBroadcastTo;
impl MultiBroadcastTo {
fn eval_t<T: Datum>(input: &Tensor, shape: &[usize]) -> TractResult<TVec<Arc<Tensor>>> {
let input = input.to_array_view::<T>()?;
let output = input.broadcast(&*shape).ok_or("incompatible shapes")?;
Ok(tvec![output.to_owned().into_arc_tensor()])
}
}
impl Op for MultiBroadcastTo {
fn name(&self) -> Cow<str> {
"MultiBroadcastTo".into()
}
}
impl StatelessOp for MultiBroadcastTo {
fn eval(&self, mut inputs: TVec<Arc<Tensor>>) -> TractResult<TVec<Arc<Tensor>>> {
let (input, dims) = args_2!(inputs);
let dims: Vec<usize> = dims.to_array_view::<i64>()?.iter().map(|i| *i as usize).collect();
let dims = crate::broadcast::multi_broadcast(&[&*dims, &*input.shape()])
.ok_or("incompatible shapes")?;
dispatch_datum!(Self::eval_t(input.datum_type())(&*input, &*dims))
}
}
impl InferenceRulesOp for MultiBroadcastTo {
fn rules<'r, 'p: 'r, 's: 'r>(
&'s self,
s: &mut Solver<'r>,
inputs: &'p [TensorProxy],
outputs: &'p [TensorProxy],
) -> InferenceResult {
check_input_arity(&inputs, 2)?;
check_output_arity(&outputs, 1)?;
s.equals(&inputs[1].datum_type, DatumType::I64)?;
s.equals(&outputs[0].datum_type, &inputs[0].datum_type)?;
s.equals(&inputs[1].rank, 1)?;
s.given(&inputs[0].shape, move |s, shape| {
s.given(&inputs[1].value, move |s, dims| {
let dims: Vec<TDim> =
dims.to_array_view::<i64>().unwrap().iter().map(|i| TDim::from(*i)).collect();
let dims = crate::broadcast::multi_broadcast(&[&*dims, &*shape])
.ok_or("incompatible shapes")
.unwrap();
s.equals(&outputs[0].shape, ShapeFact::from(dims))
})
})
}
}