Intel FPGA Integer Arithmetic IP Cores User Guide

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ID 683490
Date 10/05/2020
Public
Document Table of Contents

8.1.1. Pre-adder

With pre-adder, additions or subtractions are done prior to feeding the multiplier.

There are five pre-adder modes:

  • Simple mode
  • Coefficient mode
  • Input mode
  • Square mode
  • Constant mode
Note: When pre-adder is used (pre-adder coefficient/input/square mode), all data inputs to the multiplier must have the same clock setting.

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