This document contains a list of Open Source RISC-V software implementations (user mode simulator simulators, full system emulators and dynamic binary translators.
Spike is the official RISC-V Instruction Set Simulator. Spike serves as the behavioural reference model for the RISC-V ISA. Spike is easily extended to add new instructions. Spike supports RV32GC and RV64GC, and has Debug and GDB support.
QEMU, the fast processor emulator, is a multiplatform user mode simulator and a full system emulator that emulates CPUs via dynamic binary translation. It supports a wide variety of architectures. riscv-qemu supports RV32GC and RV64GC and has GDB support.
RISCVEMU is a full system emulator for the RISC-V architecture. RISCVEMU is notable in that it supports RV32GC, RV64GC and RV128GC as well as VirtIO console, block and network devices.
The gem5 simulator is a modular platform for computer-system architecture research, encompassing system-level architecture as well as processor microarchitecture. It features a detailed pipeline model for a wide variety of architecures.
rv8 is a simulation suite that features a user mode simulator, a full system emulator, a dynamic binary translator along with metadata tools and a model for generating artefacts based on instruction set metadata. rv8 implements an 16550-like UART and supports RV32GC and RV64GC.