ref: 8a6851fa526de6f5dcf5ddabb5609f3a85929e6f
dir: /ops.h/
typedef struct Frame Frame; struct Frame { u32int *pc; Frame *next; }; typedef struct Op Op; struct Op { u32int opcode; void (*f)(Frame*,u32int); }; int oplookup(u32int code, void (**f)(Frame*,u32int));