-_Bool load_in_delay_slot(union code op);
-_Bool opcode_is_io(union code op);
-_Bool is_unconditional_jump(union code c);
-_Bool is_syscall(union code c);
+__cnst _Bool opcode_is_mfc(union code op);
+__cnst _Bool opcode_is_load(union code op);
+__cnst _Bool opcode_is_io(union code op);
+__cnst _Bool is_unconditional_jump(union code c);
+__cnst _Bool is_syscall(union code c);