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标志位生成
2022-06-21 22:05:00 【Nancy-sn】
1、溢出标志OF (Overflow Flag)
若算术运算的结果有溢出,则OF=1;否则 OF=0
2、符号标志SF (Sign Flag)
运算结果最高位为1,则SF = 1;否则SF = 0
3、零标志ZF (Zero Flag)
若运算结果为0,则ZF = 1;否则ZF = 0
4、进位标志CF (Carry Flag)
当运算结果的最高有效位有进位(加法)或借位(减法)时,进位标志置1,即CF = 1;否则CF= 0。 
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