目录
dsnz R
R = R - 1 if R != 0 then skip end
将寄存器R减1,结果存回到寄存器R,同时判断结果,结果不为0则跳过下一条指令;
dsnz A, R
A = R - 1 if A != 0 then skip end
将寄存器R减1,结果存储到累加器A,同时判断结果,如果不为0则跳过下一条指令;