Function log_sum_exp

imperative/python/test/unit/functional/test_loss.py:133–135

(x, y)

        return np.log(np.maximum(x, eps))

    def log_sum_exp(x, y):
        x, y = np.maximum(x, y), np.minimum(x, y)
        return x + np.log1p(np.exp(y - x))

    len_pred, alphabet_size = pred.shape
    (len_label,) = label.shape