-_Bool opcode_reads_register(union code op, u8 reg);
-_Bool opcode_writes_register(union code op, u8 reg);
-_Bool has_delay_slot(union code op);
+__cnst _Bool opcode_reads_register(union code op, u8 reg);
+__cnst _Bool opcode_writes_register(union code op, u8 reg);
+__cnst u64 opcode_write_mask(union code op);
+__cnst _Bool has_delay_slot(union code op);