From: "Campbell, Rolf [SKY:1U32:EXCH]" <moscoop AT americasm01 DOT nt DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: odd or even?
Date: Mon, 06 Mar 2000 09:48:33 -0500
Organization: Nortel Networks
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To: djgpp AT delorie DOT com
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Martin Stromberg wrote:

> : >It should work fine with signed integers....
> : >-1 = 0xFFFFFFFF (lowest bit set)
> : >-2 = 0xFFFFFFFE (lowest bit not set)
>
> : Might not work on other machines, though.  (I honestly don't know,
> : I've never used a machine that wasn't 2's-complement)
>
> One's complement works as well:
> +0 = 0x00000000 (lowest bit not set)
> -0 = 0x80000000 (lowest bit not set)
> -1 = 0x80000001 (lowest bit set)
> -2 = 0x80000002 (lowest bit not set)
>
> What other interesting representations are there?

    Well, I've heard of a format where you only had to flip 1 bit to
increment or decrement any integer..  But I don't know if anyone actually
make a processor for it.

--
(\/) Rolf Campbell (\/)