Intel® Agilex™ Variable Precision DSP Blocks User Guide

ID 683037
Date 11/17/2022
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Give Feedback

3.1.3. Multiplier Adder Sum Mode

The multiplier adder sum mode uses these equations:

  • resulta = (bx × by) + (ax × ay) to calculate the sum of the two 18 x 19 multiplications.
  • resulta = (bx × by) – (ax × ay) to calculate the difference of the two 18 x 19 multiplications.
Figure 19. One Sum of Two 18 x 18 or 18 × 19 Multipliers with One Variable Precision DSP Block for Intel® Agilex™ Devices

In this figure, the variable is defined as follows:

  • n = 19 for 18 × 19 signed operands
  • n = 18 for 18 × 18 unsigned operands

Set the SUB dynamic control signal to high to calculate the difference of the two 18 × 19 multiplications.