ref: b7ecf84c597a332ae0c1bb1534b61cfed573c92c
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));