Reconfigurable fixed/floating point general adder

Abstract

The invention provides a reconfigurable fixed / floating point general adder. The general adder comprises a 48-bit fixed point adder, a selector and a fixed / floating point operation converter, wherein the 48-bit fixed point adder performs fixed point additive operation and can be reconfigured into a single-precision floating point adder; the selector selects a corresponding fixed point or floating point additive operation passage according to top configuration information and performs output control; and the fixed / floating point operation converter converts the 48-bit fixed point adder into a 32-bit single-precision floating point adder. The general adder has the advantages that a full running structure is adopted, the fixed point adder is correspondingly optimized based on a parallel prefix adder, and on the basis of guaranteeing the operation performance of the fixed point adder, operation delay of the fixed point adder is shortened, and a gate circuit area is reduced. Through the overall structure of the fixed / floating point general adder, the universality of the adder is effectively improved under the condition that precision and data throughput are guaranteed.

Description

technical field [0001] The invention discloses a fixed-floating-point universal adder, which belongs to the field of digital signal processing. Background technique [0002] In recent years, with the rapid development of electronic technology, the complexity and integration of processors have become higher and higher. Adders are a very basic and critical existence in both microprocessors and programmable logic devices. [0003] In different fields of digital signal processing, the requirements for adders are also different. According to the data types used in operations, adders can be divided into fixed-point adders and floating-point adders. The fixed-point adder requires less computing resources, but its precision is lower; the floating-point adder requires more computing resources, but its precision is high. They each have their advantages and disadvantages. However, the existing adders generally only support a single fixed-point addition or floating-point addition ope...

AI Technical Summary

Problems solved by technology

However, the existing adders generally only support a single fixed-point addition or floating-point addition operation

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