Custom instructions can be simple, such as variants of multiple-and-accumulate instructions, or they can be custom control instructions, such as zero overhead loops ... the RISC-V specification allows ...
While traditional PCSs are based on ... Ottaviano A, Balas R, Bambini G, et al. ControlPULP: A RISC-V On-Chip Parallel Power Controller for Many-Core HPC Processors with FPGA-Based ...