RISC

/prog/, I'm working on a RISC instruction set that is more RISC than any RISC out there. I've devised an instruction format, plus fifteen core instructions that should suffice for any programming out there. The instruction format, instruction forms, and instructions can be found here:

http://jsbin.com/ekuwap

Any comments or suggestions?

>>5
Depends on what you plan on using the instruction set for. syscall instructions are usually used for dealing with privilege levels (security) and providing a simple way of calling kernel or hypervisor code.
I would also like an indirect jump (to a register) instruction.