在执行NEG指令时,对标志位CF有影响,其影响的规则是______。A.对正数求补时,CF=0B.对负数求补时,CF=0C.对非零数求补时,CF=1D.对零求补时,CF=1
在执行NEG指令时,对标志位CF有影响,其影响的规则是______。
A.对正数求补时,CF=0
B.对负数求补时,CF=0
C.对非零数求补时,CF=1
D.对零求补时,CF=1
相关考题:
若(AX)=0122H,四个标志位CF、SF、ZF、OF 的初始状态为0,执行指令SLIBAX,OFFFH后,这四个标志位的状态是( )。A.(CF)=0, (SF)=0, (ZF)=0, (OF)=0B.(CF)=1, (SF)=1, (ZF)=0, (OF)=0C.(CF)=0, (SF)=0, (ZF)=1, (OF)=1D.(CF)=1, (SF)=1, (ZF)=1, (OF)=1
若(AX)=0122H,四个标志位CF、SF、ZF、OF的初始状态为0,执行指令SUB AX, 0FFFH后,这四个标志位的状态是______。A.(CF)=O,(SF)=0,(ZF)=0,(OF)=0B.(CF)=1, (SF)=1, (ZF)=0, (OF)=0C.(CF)=0, (SF)=0, (ZF)=1, (OF)=1D.(CF)=1, (SF)=1, (ZF)=1, (OF)=1
若(AX)=0122H,4个标志位CF、SF、ZF、OF的初始状态为0,执行指令SUB AX,0FFFH后这4个标志位的状态是( )。A.(CF)=0, (SF)=0, (2P)=0, (OF)=0B.(CF)=1, (SF)=1, (2P)=0, (OF)=0C.(CF)=0, (SF)=0, (ZP)=1, (OF)=1D.(CF)=1, (SF)=1, (ZF)=1, (OF)=1
若(AX)=0122H,四个标志位CF、SF、ZF、OF的初始状态为0,执行指令SUB AX, OFFFH后,这4个标志位的状态是( )。A.ZF=0,SF=0,CF=0,OF=0B.ZF=0,SF=1,CF=1,OF=0C.ZF=1,SF=0;CF=0,OF=1D.ZF=1,SF=1,CF=1,OF=1
判断题介绍LOOP指令时,常说它相当于DECECX和JNZ两条指令。但考虑对状态标志的影响,它们有差别。LOOP指令不影响标志,而DEC指令却会影响除CF之外的其他状态标志。A对B错