RISC-V instruction set extension method for accelerating digital signal processing

Abstract

The invention discloses an RISC-V instruction set extension method for accelerating digital signal processing, which is used for constructing an RISC-V instruction set for digital signal processing, and comprises the following steps: determining an operation type set of extension instructions for digital signal processing according to the algorithm type of digital signal processing; setting an operand type of the extension instruction according to the processor architecture; setting a data processing mode of the extension instruction according to the precision operation characteristics of digital signal processing; combining the operation type set, the operand type and the data processing mode of the extension instruction to construct an extension instruction subset; and encoding the extended instruction subset according to the instruction format of the RIS-CV instruction set, and constructing the RISC-V instruction set for digital signal processing. The problems that when an existingRISC-V instruction set is applied to digital signal processing, the operation type is insufficient, and the data width flexibility and the data result precision are insufficient can be solved, and theperformance of a processor during digital signal processing is improved.

Description

technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a RISC-V instruction set extension method for accelerating digital signal processing. Background technique [0002] The instruction set is the bridge and interface between the underlying hardware of the processor and the software running on it. The processor reads instructions from the memory, decodes and executes them, and completes complex calculation and control tasks. Each processor has a specific instruction set corresponding to it, and the design of the instruction set directly affects the performance of the processor. In the current processor design, in addition to setting corresponding instruction sets for basic operations and control, it is usually necessary to design extended instruction sets for specific application fields. The instruction set subsystem for a specific application field simplifies the complex operation control process into correspondi...

AI Technical Summary

Problems solved by technology

However, since the current RISC-V instruction set does not have instructions for digital signal processing such as dot product and multiply-accumulate, and mainly processes data with a data bit width of 32bit or 64bit, it also lacks saturation operations, rounding operations, etc. Instruction support for precision and validity processing operations leads to relatively large limitations when the existing RISC-V instruction set is applied to digital signal processing

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