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Jun 27th, 2006, 11:52 AM
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#1 |
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Substraction...
Hi how can i substract value1 from EAX.
value1 = 0FFFFh. |
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Jun 27th, 2006, 11:57 AM
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#2 |
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MOV eax,value1
sub eax,value1 Is that correct? |
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Jun 27th, 2006, 11:57 AM
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#3 |
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Professional Programmer
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It appears to be correct
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Jun 27th, 2006, 2:02 PM
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#4 |
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I would suggest that you could just set EAX to zero. However, if you want to subtract value1 from another value, then put the other value in EAX and subtract value1.
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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
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Jun 27th, 2006, 2:58 PM
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#5 |
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So is right:
mov eax,value1 sub eax,value1 I know what you are saying: mov eax,0. but this is what the Mr. want me to do. thanks DaWei. |
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Jun 27th, 2006, 3:26 PM
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#6 |
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If you subtract a value from itself, you will get zero. At least, it used to be that way. I won't address possible glitches arising from twos-complement usage.
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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
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