The SiFive Vector Coprocessor Interface (VCIX) provides a flexible mechanism to extend application processors with custom coprocessors and variable-latency arithmetic units. The interface offers throughput comparable to that of standard RISC-V vector instructions. To accelerate performance, system designers may use VCIX as a low-latency, high-throughput interface to a coprocessor https://www.sifive.com/document-file/sifive-vector-coprocessor-interface-vcix-software Operations vcix.v.iv (vcix:...