Trigonometric function and hyperbolic function extension instruction computing device and processor core

Abstract

The invention provides a trigonometric function and hyperbolic function extension instruction calculation device and a processor core. The device comprises a control signal generation module, a special angle judgment module, a storage module, an iteration module and an output selection module. The one-hot code coding is carried out on the control signal of the trigonometric function and hyperbolic function extension instruction calculation device, and since only one bit of the one-hot code is 1, secondary decoding of a funct3 signal is avoided, so that resource consumption of a hardware extension circuit is saved.

Description

technical field [0001] The present invention relates to the technical field of processors based on RISC-V architecture, in particular to a trigonometric function and hyperbolic function extended instruction computing device and a processor core. Background technique [0002] The instruction set is the interface that is stored inside the processor and connects hardware and software. The processor completes complex computing tasks by reading instructions from memory, decoding and executing operations. 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 processor design, in addition to setting the instruction set that supports basic operations and control, it is also necessary to design extended instruction sets for specific application fields. The extension of the instruction set in a specific application field can simplify the complexity, so that the processor can exec...

AI Technical Summary

Problems solved by technology

Trigonometric and hyperbolic functions will generate dozens of instructions when compiled based on the RISC-V basic instruction set (RV32I), and the calculation time is long

In the hardware circuit implementation of traditional trigonometric and hyperbolic functions, the CORDIC algorithm is widely used due to its high calculation accuracy and short calculation time, but it needs to introduce complex system control logic, which will occupy a large amount of FPGA logic resources and lead to circuit failure. Reduced operating frequency

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