asm_fmt
enum asm_fmt i_format;
int asm_extract(enum asm_op, enum asm_fmt, uint64_t, struct asm_bundle *, int);
enum asm_fmt fmt;
enum asm_fmt fmt;
enum asm_fmt fmt;
enum asm_fmt fmt;
enum asm_fmt fmt;
enum asm_fmt fmt;
asm_extract(enum asm_op op, enum asm_fmt fmt, uint64_t bits,