高性能多通道浮点乘加器

High Performance Multi-Path Floating-Point MAF

随着面向数字信号处理以及其他相关领域的专用微处理技术的发展,浮点乘加运算变得日益重要。该操作将乘法和加法相融合,节省了整个运算的执行延时。基于多通路的思想,文章提出了一种改进的多通道浮点乘加器结构。根据对阶时A相对于B×C乘积的位置,将整个处理过程分为四条数据通路,采用不同的数据处理通路,避免了不必要的处理延时。通过对比得出:多通道浮点乘加器无论在速度以及功耗上,都具有一定的优势。

The multiply-add operation is becoming important increasingly with the development of application specific microprocessor oriented to DSP and some other interrelated fields.The computation of a multiplication and the summation of the result with another operand can be performed concurrently reducing,in this way,the latency of the overall operation.Based on the idea of multi-path,this thesis proposes an improved multi-path floating-point fused multiply-add （MAF）.The process is divided into four data paths according to the relative position of operand A from the result of B×C.Each path uses the separate operation process so that the unwanted delay is avoided.By contrast,we can conclude that the multi-path MAF architecture has advantages in both the speed and the power.