ACTIVATION FUNCTION COMPUTING DEVICE AND COMPUTING METHOD THEREOF

Abstract

An activation function computing device and a computing method thereof are provided. The activation function computing device computes an input value conforming to a floating-point number format to generate an output value. The activation function computing device includes a plurality of lookup tables and a controller. The plurality of lookup tables respectively store correspondences between a plurality of mantissa values and a plurality of coefficients. The controller selects a selected coefficient from the coefficients according to an input exponent part and an input mantissa part of the input value. The controller computes the selected coefficient and the input value according to an approximation function including a Sigmoid function to generate the output value which conforms to the floating-point number format and has high accuracy.

CPC Classifications