單項(xiàng)選擇題在執(zhí)行NEG指令時(shí),對(duì)標(biāo)志位CF有影響,其影響的規(guī)則是()

A.對(duì)零求補(bǔ)時(shí),CF=1
B.對(duì)非零數(shù)數(shù)求補(bǔ)時(shí),CF=1
C.對(duì)正數(shù)求補(bǔ)時(shí),CF=0
D.對(duì)負(fù)數(shù)求補(bǔ)時(shí),CF=0


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