Program stream control method for vector processor and system

Abstract

The invention discloses a program stream control method for a vector processor and a system. The method includes steps of outputting a vector data processing state when a vector data processing unit executes a vector data operation instruction outputted by a fetch unit; acquiring a the vector data processing state by the aid of a program stream control unit; generating a program stream changing mark according to the vector data processing state; starting to sequentially obtain instructions from program stream changing addresses by the aid of the fetch unit according to the program steam changing mark; and outputting acquired instructions to the vector data processing unit. The system comprises the fetch unit, the vector data processing unit and the program stream control unit, the vector data processing unit consists of a state generating unit used for generating the vector data processing state, and an output end of the state generating unit is connected with the program stream control unit. The program stream control method for the vector process and the system have the advantages that a program stream can be changed during processing, vector data processing time is saved, data processing volume is reduced, and data processing efficiency is high.

Description

technical field [0001] The invention relates to the field of microprocessors, in particular to a program flow control method and system for vector processors. Background technique [0002] Application algorithms such as wireless communication and image and video processing contain a large number of vector operations, such as the addition of 16 pairs of data, etc. A vector processor is a processor that supports vector data operations, and the above-mentioned 16 pairs of data addition operations can be performed through a vector instruction of the vector processor. In the prior art, program flow control of a vector processor is generally implemented through scalar program flow control (including branch, jump, or procedure call / return, etc.). However, this program flow control method of scalar program flow control is difficult to handle complex algorithms. For example, take the algorithm of searching characters in vector data as an example, when a certain element in the vecto...

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Problems solved by technology

However, since each arithmetic unit of the vector data processing unit executes vector data operation instructions independently of each other, for example, when executing the above-mentioned search character, the program flow control unit will execute a new program flow only after all the arithmetic units have completed their operations. , the scalar program flow control cannot effectively deal with the algorithm related to the vector data processing state, and cannot change the program flow during the processing process, which has the problems of long vector data processing time, large amount of processed data, and low data processing efficiency

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