Собственно, сабж. Тихо и не заметно вышла бета версия luajit с поддержкой soft float для MIPS.
MIPS32 dual-number + soft-float support
The existing MIPS port of LuaJIT requires a hardware FPU, but many embedded devices based on MIPS CPUs don't have (nor need) one. Since only single-number mode is supported, even FPU emulation in the kernel would be unacceptably slow.
Cisco Systems, Inc. has sponsored the development of the missing dual-number + soft-float functionality for the existing MIPS32 port. The work is carried out by RT-RK and has been merged into the v2.1 branch of the git repository.
With these changes, the MIPS port of LuaJIT can now be used on many more MIPS devices, from tiny routers up to high-performance FPU-less MIPS SoCs.