A trigonometric hardware acceleration in 32-bit RISC-V microcontroller with custom instruction

Abstract

This work presents a 32-bit Reduced Instruction Set Computer fifth-generation (RISC-V) microprocessor with a COordinate Rotation DIgital Computer (CORDIC) accelerator. The accelerator is implemented inside the core and being used by the software via custom instruction. The used microprocessor is the VexRiscv with the Instruction Set Architecture (ISA) of RV32IM; that means 32-bit RISC-V including Integer and Multiplication. The experimental results were collected using Field-Programmable Gate Array (FPGA) on the DE2-115 development kit and Application Specific Integrated Chip (ASIC) synthesizer on 180-nm CMOS process library.