Re: how to decide the value of SF
<spamtrap@xxxxxxxxxx> wrote in message
news:1161530555.058192.245010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
if sub ax,ax(two numbers compared,the resulst is neither a plus nor
a negative )
how to determine the value of SF?
thanks for your help...
The Sign Flag (SF) is a copy of the highest bit in the destination register.
So it is zero here, which is intuitively correct -- 0 is not regarded a
negative number.
[Jongware]
.
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