175c175
< return new WarnUnimplemented("yield", machInst);
---
> return new YieldInst(machInst);
177c177
< return new WarnUnimplemented("wfe", machInst);
---
> return new WfeInst(machInst);
179c179
< return new WarnUnimplemented("wfi", machInst);
---
> return new WfiInst(machInst);
181c181
< return new WarnUnimplemented("sev", machInst);
---
> return new SevInst(machInst);