清零条件转移

[计] branch on condition clear

qīng líng tiáo jiàn zhuǎn yí ㄑㄧㄥ ㄌㄧㄥˊ ㄊㄧㄠˊ ㄐㄧㄢˋ ㄓㄨㄢˇ ㄧˊ