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From: | "Florent" <florent AT oih DOT rwth-aachen DOT de> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: twin complement ...... |
Date: | Fri, 18 Aug 2000 11:07:58 +0200 |
Organization: | Aachen University of Technology (RWTH) |
Lines: | 29 |
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To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
>1) This function will work quit slow (if you're going to use it in some loop >for example) ah, why ? because of all tests ? no it's not in a loop, I use it three times when I receive some special datas from the machine. >2) Can you tell me what exacly is twin complement ? How this function is >suppose to work ? a twin complement is : int x=0x10 in bin x= 0001 0000 wiht the first complement we get 1110 1111 (replace all 1 by 0 et 0 by1) the n with the 2nd complement we had 1 1110 1111 + 1 _________ 1111 0000 so the twin complement of 0x10 is 0xf0 usually it's used for the negative number, but here I received some datas from a machine and I need to do the twin complement to read the value.
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