Method and apparatus with data processing

A data processing apparatus, the apparatus comprising:

• a memory;
• and
• a processor configured to:
• normalize input data of an activation function comprising a division operation;
• determine dividend data corresponding to a dividend of the division operation by reading, from the memory, a value of a first lookup table addressed by the normalized input data;
• determine divisor data corresponding to a divisor of the division operation by accumulating the dividend data;
• and
• determine output data of the activation function corresponding to an output of the division operation obtained by reading, from the memory, a value of a second lookup table addressed by the dividend data and the divisor data.

A processor-implemented data processing method, the method comprising:

• determining dividend data corresponding to a dividend of an activation function by reading, from a memory, a value of a first lookup table based on input data of the activation function;
• determining divisor data corresponding to a divisor of the activation function by accumulating the dividend data;
• and
• determining output data corresponding to an output of the activation function by reading, from the memory, a value of a second lookup table based on the dividend data and the divisor data.

A processor-implemented data processing method, the method comprising:

• normalizing input data of an activation function comprising a dividend and a divisor;
• determining dividend data by reading, from a first lookup table of one or more memories, a value of a column-index corresponding to a value of the normalized input data;
• determining divisor data by accumulating the dividend data;
• and
• determining output data of the activation function by reading, from a second lookup table of the one or more memories, a value of a column-index corresponding to the value of the normalized input data and of a row-index corresponding to a value of the divisor data.