RiscLua 546VFP requires an ARM processor with VFP, and so is not suitable for RiscPC, Iyonix or VRPC. It uses dynamic linking.
RiscLua 84 (soft-float) has been compiled with the Acorn C compiler (v7.51). It uses soft floats and is only recommended for older machines.
This version is based on Lua 5.4 and has the lpeg and riscos libraries built in. You can build RiscLua for yourself.