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tanhshrink_backward

teeny_kernels::nn::activation::tanh

Function tanhshrink_backward 

Source 
pub fn tanhshrink_backward<T: Triton, D: Float, const BLOCK_SIZE: i32>(
    dy_ptr: T::Pointer<D>,
    x_ptr: T::Pointer<D>,
    y_ptr: T::Pointer<D>,
    dx_ptr: T::Pointer<D>,
    n_elements: i32,
)
where
    T::I32Tensor: Tensor<i32, 1> + Comparison<i32, BoolTensor = T::BoolTensor>,
    T::Pointer<D>: AddOffsets<i32, 1, T::I32Tensor, Output = T::Tensor<T::Pointer<D>>>,
Expand description

Backward: dx = dy * tanh²(x) Since y = x - tanh(x), we have tanh(x) = x - y, so tanh²(x) = (x-y)².