Open-source RISC-V from Bluespec, Inc; this is one of a family of free, open-source RISC-V CPUs.

* Piccolo: 3-stage, in-order pipeline: Piccolo is intended for low-end applications (Embedded Systems, IoT, microcontrollers, etc.).

* Flute: 5-stage, in-order pipeline: Flute is intended for low-end to medium applications that require 64-bit operation, an MMU (Virtual Memory) and more performance than Piccolo-class processors.

* Tooba: superscalar, out-of-order pipeline: slight variation on MIT's RISCY-OOO [In progress!]

* Bassoon: deep, out-of-order pipeline: [Coming!]

https://github.com/bluespec/Piccolo
https://github.com/bluespec/Flute
https://github.com/bluespec/Toooba
https://github.com/bluespec/Bassoon

#Verilog #RISCV #BlueSpec #BSV #AXI4
@ipcores