What's needed for RISC-V opcodes SLTI, LB, SLT, SRA?

[Sjors]

I'm not a compiler expert, but I wonder what's missing for these opcodes? And are they generally useful? How do you currently work around their absence?

[halseth]

The reason they are missing is that I haven't encountered them when tracing a compiled program.

Would probably be as "easy" as hand-writing an assembly program that uses these opcodes, then implement and verify them.