gistfile1.c

#define DIRECT_THREADED
#ifndef DIRECT_THREADED

#define INIT_DISPACTH for (;;) { i = *pc; switch (GET_OPCODE(i)) {
#define CASE(op) case op:
#define NEXT mrb->arena_idx = ai; pc++; break
#define JUMP break
#define END_DISPACTH }}

#else

#define INIT_DISPACTH JUMP; return mrb_nil_value();
#define CASE(op) L_ ## op:
#define NEXT mrb->arena_idx = ai; i=*++pc; goto *optable[GET_OPCODE(i)]
#define JUMP i=*pc; goto *optable[GET_OPCODE(i)]

#define END_DISPACTH

#endif