Multifunctional fixed-point media access control (MAC) operation device for microprocessor

Abstract

The invention discloses a multifunctional fixed-point multiply-add unit media access control (MAC) operation device for a microprocessor. The multifunctional fixed-point MAC operation device comprises an instruction distribution unit, an instruction decoding unit, a storage unit and an instruction operation unit, wherein the instruction operation unit comprises a quaternary pipeline operation structure for multifunctional fixed-point multiply-add unit MAC operation and a result selection module which is used for acquiring an output result of the quaternary pipeline operation structure and writing the output result back to the storage unit; the quaternary pipeline operation structure, from an input end to an output end, sequentially comprises a secondary multiplier operation station, an adder operation station and a compound operation station which is used for performing complex operation, dot product operation and 32-bit multiplication operation; the secondary multiplier operation station comprises a plurality of single instruction multiple data (SIMD) multipliers which are distributed in parallel; and the adder operation station comprises a plurality of SIMD adders which are distributed in parallel. The multifunctional fixed-point MAC operation device supports various kinds of fixed-point accumulation multiplication and has the advantages of few occupation hardware resources, high hardware reusability, good expandability and small programming code amount.

Description

technical field [0001] The present invention relates to the computing unit of microprocessor, in particular to a multifunctional fixed-point multiply-add unit (Multiply Add Cell, MAC) suitable for microprocessors including Single Instruction Multiple Data (Single Instruction Multiple Data, SIMD) DSP ) computing device. Background technique [0002] In application fields such as image processing, radar signal processing, and modern communications, due to the large amount of processed data, the accuracy and real-time performance of data calculations are high, and ultra-high-performance microprocessors are usually used for processing. Since these algorithms are highly multiplication-intensive and addition-intensive, involving a large number of fixed-point accumulate multiplications including fixed-point multiply-add / subtract, dot-product, and complex-number operations, the fixed-point data processing capabilities of microprocessors are becoming more and more important. importa...

AI Technical Summary

Problems solved by technology

However, the common disadvantages of the existing technology are: 1) only some arithmetic functions such as fixed-point multiplication or fixed-point multiplication and addition are realized, and operations such as addition and subtraction cannot be supported, and the functions are single; 2) more hardware resources are occupied, and hardware multiplexing Low rate, poor scalability, large amount of programming code

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