Function hinge_embedding_loss_backward 

pub fn hinge_embedding_loss_backward<T: Triton, const BLOCK_SIZE: i32>(
    dy_ptr: T::Pointer<f32>,
    inp_ptr: T::Pointer<f32>,
    y_ptr: T::Pointer<f32>,
    dx_ptr: T::Pointer<f32>,
    n_elements: i32,
    margin: f32,
)
where
    T::I32Tensor: Tensor<i32, 1> + Comparison<i32, BoolTensor = T::BoolTensor>,
    T::Pointer<f32>: AddOffsets<i32, 1, T::I32Tensor, Output = T::Tensor<T::Pointer<f32>>>,

Hinge embedding loss backward (element-wise).

dx[i] = dy[i]     if y[i] ==  1
      = -dy[i]    if y[i] == -1 and margin - x[i] > 0
      = 0         otherwise