Single-instruction multi-data shift unit supporting multiple data types

Abstract

The invention discloses a single-instruction multi-data shift unit supporting multiple data types. The single-instruction multi-data shift unit comprises N atomic shifting arrays, wherein N is a positive integer; each atomic shifting array supports a shifting operation of a 32-bit data width, and comprises a format converter, a first shifter, a second shifter, and a shifting result wrapper, wherein the format converter is used for performing format conversion on input 32-bit original data according to input data type information, the first shifter is used for receiving 32-bit data output by the format converter and performing first-stage shifting on the 32-bit data according to the input data type information and a shifting amount, the second shifter is used for receiving the output result of the first shifter and performing second-stage shifting on data in bytes, and the shifting result wrapper is used for receiving the shifting result of the second shifter, and integrating and wrapping shifted byte data into a final shifting result according to input data type control information. The single-instruction multi-data shift unit has the advantages of multiplexing of resources, simple structure and high time sequence performance.

Description

technical field [0001] The invention relates to a microprocessor architecture design, in particular to a single instruction multiple data shift unit. Background technique [0002] In order to meet the increasing performance requirements of multimedia computing, such as digital audio decoding, image processing and video processing. In a high-performance microprocessor, the multimedia computing unit has become an indispensable part of the microprocessor due to its good power consumption and performance benefits, such as the neon expansion unit of ARM Company. In order to obtain better multimedia processing performance, the multimedia processing unit often needs a wider data bit width (usually 128-bit data bit width), in order to obtain a larger unit processing capability, and the increased data bit width is undoubtedly greatly increased. The resources and power consumption of the vector processing unit are greatly increased, thereby greatly increasing the cost. Controlling re...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of excessive resource consumption and poor timing division of existing single instruction multiple data shift components, the present invention provides a single instruction that supports multiple data types with resource multiplexing, simple structure and good timing performance multiple data shifter

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