Is there any document about mips JIT?

[WilliamWangPeng]

Hello dear everyone,
Recently I want to add JIT in RISCV, but I don't know how to do it. I notice that here is the definition of MIPS JIT [1], and I want to ask you that if there is any document about the implementation of MIPS JIT?

[1]https://github.com/jtcriswell/SVA/blob/master/llvm/lib/Target/Mips/MipsCodeEmitter.cpp

Best regards
Many thanks to you
William