fn softmax_zero(tensor: @Tensor<T>, axis: usize) -> Tensor<T>;
Applies the Softmax zero function to an n-dimensional input Tensor rescaling them so that the elements of the n-dimensional output Tensor lie in the range [0,1] and sum to 1 while keeping the zero elements to zero.
The softmax zero on the set
$$
\text{softmax zero}(x_i) = \begin{cases}
0 & \qquad x_i = 0 \
\frac{e^{x_i}}{ \sum_{x \in {S}} e^{x}} & \qquad \text{otherwise}
\end{cases}
$$
where
tensor
(@Tensor<T>
) - The input tensor.axis
(usize
) - The axis along which to compute the softmax zero.
A Tensor of fixed point numbers with the same shape than the input Tensor.
Constrain input and output types to fixed point tensors.
use core::array::{ArrayTrait, SpanTrait};
use orion::operators::tensor::{TensorTrait, Tensor, FP8x23Tensor};
use orion::operators::nn::{NNTrait, FP8x23NN};
use orion::numbers::{FP8x23, FixedTrait};
use core::debug::PrintTrait;
fn softmax_zero_example() -> Tensor<FP8x23> {
let tensor = TensorTrait::<FP8x23>::new(
shape: array![2, 2].span(),
data: array![
FixedTrait::new(0, false),
FixedTrait::new(8388608, false),
FixedTrait::new(16777216, false),
FixedTrait::new(25165824, false),
]
.span(),
);
return NNTrait::softmax_zero(@tensor, 1);
}
>>> [[0,0x800000],[2256043,6132564]]
// The fixed point representation of
// [[0, 1],[0.2689, 0.7311]]