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Oct 7th, 2005, 11:13 AM
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#1 |
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M$ "puzzle"
The following asm block performs a common math function, what is it?
cwd xor ax, dx sub ax, dx ps: me? i have no clue what "asm" means... anybody knows how to tackle this thing?  |
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Oct 7th, 2005, 12:03 PM
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#2 |
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Thats assembly.... thats all I know.
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Oct 7th, 2005, 12:05 PM
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#3 |
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it's assembly alright, and sub probably stands for substract. So you're first Xoring register ax with dx and then substracting dx from ax, I think.
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Oct 7th, 2005, 12:18 PM
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#4 |
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Sorry for answering a question with a question, but if you don't even know what asm means, why are you worrying with this???
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Oct 7th, 2005, 12:53 PM
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#5 | |
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Quote:
 just being curious... I never seen this before, is there smth wrong with asking? |
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Oct 7th, 2005, 12:57 PM
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#6 |
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The cwd converts its operand from a word to a double word. The xor performs that operation on its two operands. Same for the sub. Nopey, not a dam' thang wrong with asking. Technical forum, technical question. Well to the right of the mean, I'd say, as a post.
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Oct 8th, 2005, 1:43 AM
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#7 |
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out of curiosity, where did you come across this? and why did it trouble you so? was it inline in a C program or something?
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